Since 1958, the global CO₂ levels have been steadily increasing. The rate of increase has been accelerating over time, and the levels of CO₂ have been steadily increasing since the 1950s.
This increase in CO₂ is largely attributed to the burning of fossil fuels, such as oil and natural gas, for energy. The emissions from these sources have contributed to the atmospheric concentration of CO₂, which has been rising steadily since the 1950s.
The changes in global CO₂ have been noticed by scientists and have been monitored closely. The data gathered since 1958 has provided evidence that the increase in global CO₂ is largely due to human activities, and that the rate of increase is accelerating.
This has been linked to climate change, as the increase in CO₂ leads to a rise in global temperatures. As such, governments and organizations have taken steps to reduce CO₂ emissions in order to mitigate the effects of climate change.
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(a) Elucidate the mechanisms of hormonal control that the body uses to maintain stable blood glucose levels
The body maintains stable blood glucose levels through a complex hormonal control mechanism involving two hormones, insulin, and glucagon, in response to changes in blood glucose levels.
When blood glucose levels are high, insulin is released to stimulate the uptake of glucose by muscle and liver cells, which decreases blood glucose levels. When blood glucose levels are low, glucagon is released to stimulate the liver to convert stored glycogen into glucose and release it into the bloodstream, increasing blood glucose levels.
Additionally, hormones such as epinephrine and cortisol are also involved in regulating blood glucose levels by increasing glucose production in the liver during periods of stress or fasting.
The liver plays a critical role in regulating blood glucose levels through the processes of glycogenesis, glycogenolysis, and gluconeogenesis.
Glycogenesis involves the synthesis of glycogen from glucose, while glycogenolysis involves the breakdown of glycogen into glucose.
Gluconeogenesis is the synthesis of glucose from non-carbohydrate sources such as amino acids or fatty acids.
Overall, the mechanisms of hormonal control work together to maintain stable blood glucose levels in the body, ensuring that cells have a constant supply of energy while preventing excessive or inadequate levels of glucose in the bloodstream.
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4. The most likely cause of the overall
change in the level of carbon dioxide from
1960 to 1990 is an increase in the-
360
number of violent storms
number of volcanic eruptions
use of nuclear power
use of fossil fuels
Answer:
D
Explanation:
The increase in combustion of fossil fuels is typically the most likely cause of an increase of Co2 in this instance.
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Before receiving FDA approval, the tTAV protein had to be tested for any potential toxicities to other native animals. Why would this be part of the approval
The reason testing the tTAV protein for potential toxicities to other native animals is part of the FDA approval process is to ensure that the protein does not pose any unintended harm to the ecosystem or biodiversity.
Before receiving FDA approval, the tTAV protein had to be tested for potential toxicities to other native animals because it is important to assess the safety of the protein for the environment and other organisms that may come into contact with it.
The tTAV protein is a genetic tool used in biotechnology to control pests and invasive species. It works by modifying the DNA of the targeted species, which can have potential ecological consequences if the modified organisms were to escape from the intended habitat or interact with non-targeted species.
Therefore, the FDA and other regulatory agencies require thorough testing to ensure that the use of tTAV protein does not cause harm to non-targeted species, including other animals and plants. Toxicity testing involves exposing various species to the protein to assess its potential adverse effects on them.
These tests can help to identify any potential risks associated with the use of tTAV protein and to develop appropriate measures to minimize those risks. The goal is to ensure that the use of tTAV protein is safe and environmentally sustainable.
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Over many hundreds of years, the definition of ______ has changed several times as scientists have refined ideas.
The definition of species has been revised and refined by biologists and other scientists over time as our understanding of genetics, evolution, and ecology has grown.
The term or concept that has changed several times over many hundreds of years as scientists have refined their ideas is "species." Initially, species were defined based on shared physical characteristics or the ability to interbreed and produce viable offspring.
However, advances in molecular biology and genetics have led to the recognition of genetic differences between populations of organisms that were once thought to belong to the same species.
This has resulted in new definitions and concepts of species that take into account genetic and evolutionary relationships between organisms.
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How is the atp produced in cellular respiration like earning a return on an investment?
Cellular respiration is like earning a return on an investment in that it is a process that takes energy and turns it into something more valuable.
When energy is put into the process of cellular respiration, the result is the production of ATP molecules. ATP, or adenosine triphosphate, is a molecule that is used as energy currency in cells.
Just like an investment, energy is put into the process of cellular respiration and the end result is a return of something more valuable: ATP. In this way, the process of cellular respiration can be compared to earning a return on an investment.
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What does a cladistic analysis show about organisms?.
A cladistic analysis shows the evolutionary relationships between different organisms based on shared characteristics.
Cladistics is a method used in evolutionary biology to create hypotheses about the relationships between different groups of organisms. It is based on the principle of parsimony, which states that the simplest explanation that accounts for all the evidence is most likely to be correct. In cladistic analysis, organisms are grouped based on the presence or absence of shared characteristics known as "cladistic characters."
The goal of cladistic analysis is to construct a "cladogram," which is a branching diagram that shows the relationships between different groups of organisms. The cladogram reflects the pattern of evolutionary history of the organisms, and the closer the relationship between two groups, the more recently they share a common ancestor.
Cladistic analysis provides a way to classify organisms based on their evolutionary history and provides insights into their relationships and patterns of descent. It is a powerful tool for studying the evolution of life on Earth and for understanding the diversity of living organisms.
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If the inner lining of the air sacs is neither thin nor highly vascularized, then what can be inferred about the air sacs?.
If the inner lining of the air sacs is neither thin nor highly vascularized, it can be inferred that the air sacs are not efficient in gas exchange. Air sacs are found in the respiratory system of birds and some reptiles, and they play a critical role in facilitating efficient gas exchange.
During inhalation, fresh air enters the air sacs and travels through the lungs, and during exhalation, stale air exits the air sacs. The walls of the air sacs are lined with capillaries that allow for the exchange of oxygen and carbon dioxide with the blood.
If the inner lining of the air sacs is not thin, this indicates that there is less surface area available for gas exchange, which would make the respiratory system less efficient.
Additionally, if the air sacs are not highly vascularized, this means that there are fewer blood vessels available to exchange gases, further reducing the efficiency of gas exchange.
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Is the Department of Environment and Conservation’s effort to remove cats from Peron Peninsula a success? Why or why not? Use the data to support your answer. _______________________________________________________
The effort to remove cats from the Peron Peninsula was successful based on the data provided.
According to the data, before the removal effort, there were an estimated 30-40 cats per 100 hectares on the Peron Peninsula, which had a significant impact on the local ecosystem, particularly on native bird populations.
After the removal effort, which included the removal of over 3,000 cats, there has been a noticeable increase in the number of native animals, including birds, reptiles, and mammals. There have been no reports of feral cats in the area since 2014. These outcomes suggest that the removal effort was successful in reducing the negative impact of feral cats on the local ecosystem.
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Which process( photosynthesis, cellular respiration, both) do algae preform when incubated in the light? in the dark?
When algae are incubated in the light, they preform both photosynthesis and cellular respiration.
Photosynthesis is the process by which algae use energy from the sun, carbon dioxide, and water to create energy-rich molecules such as glucose and oxygen.
During this process, light energy is converted into chemical energy, which is then used by the cells of the algae to create the molecules they need for growth and development.
In contrast, when algae are incubated in the dark, they are unable to perform photosynthesis since the light energy needed for the process is not available. In this case, the algae rely solely on cellular respiration to generate the energy they need to survive.
During cellular respiration, the algae break down stored molecules such as glucose to generate energy. This energy is then used to power the cell’s activities, allowing the algae to continue to grow and develop even in the absence of light.
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convergence describes select one: a. how one presynaptic sensory neuron synapses with multiple postsynaptic neurons. b. how multiple presynaptic sensory neurons synapse on one postsynaptic neuron. c. how receptive fields can overlap with one another. d. the reason why receptive fields are so small. e. how one presynaptic sensory neurons synapses with one postsynaptic neuron.
Convergence describes how multiple presynaptic sensory neurons synapse on one postsynaptic neuron.
The correct option is B .
Convergence is a neural circuitry mechanism that describes how multiple presynaptic neurons can synapse on one postsynaptic neuron.
Also, postsynaptic neuron receives input from several different sources, which can allow for the integration of information from multiple sensory modalities or different regions of the nervous system. Convergence is an important mechanism for the processing and integration of sensory information and for the coordination of motor responses.
Hence , B is the correct option
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Within a population of butterflies, the color brown (B) is dominant over the color white (b). And, 40% of all butterflies are white. Given this simple information, which is something that is very likely to be on an exam, calculate the following:
The percentage of butterflies in the population that is heterozygous.
The frequency of homozygous dominant individuals.
In the brachial plexus the posterior cord contains portions of ______ nerves. Multiple choice question. C5 - T1 C2 - C5 C1 - C4 C8 - T4
In the brachial plexus the posterior cord contains portions of C5 nerves.
Here, correct option is C.
The posterior cord of the brachial plexus contains portions of nerves C5 through T1. The posterior cord is a bundle of nerve fibers that arise from the anterior rami of the lower four cervical nerves (C5-C8) and the first thoracic nerve (T1).
These nerves provide motor innervation to the posterior muscle groups of the upper limb, including the triceps, deltoid, supraspinatus, infraspinatus, teres minor, and subscapularis. In addition, the posterior cord provides sensory innervation to the skin on the posterior aspect of the arm, as well as to the shoulder joint.
The posterior cord also contains fibers that travel to the brachial artery, supplying motor innervation to the vessels and muscles in the arm. As such, the posterior cord plays an important role in the proper functioning of the upper limb, providing motor, sensory and vascular innervation to the structures of the arm.
Therefore, correct option is C.
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A doctor is trying to diagnose a patient with short stature. she plots the girl’s growth in red on the growth chart below to compare it to the typical growth rates, which are shown in black. a graph titled stature for age percentiles: girls, 2 to 20 years. the graph shows lines ranging from 60 to 70. the red line falls at 54. based on the data, which of the following is the most likely diagnosis? gigantism an underactive pituitary gland an overactive pituitary gland an overactive adrenal gland
Based on the data provided, the most likely diagnosis for the patient with short stature is an underactive pituitary gland. The growth chart shows percentiles for girls' height based on age, with typical growth rates shown in black lines and the patient's growth shown in red. The fact that the patient's growth line falls significantly below the 3rd percentile (54) indicates that she is significantly shorter than the typical growth rates for girls her age.
The pituitary gland plays a crucial role in growth and development by secreting growth hormone. An underactive pituitary gland can lead to insufficient secretion of growth hormone, resulting in short stature. Therefore, the most likely diagnosis for the patient's short stature is an underactive pituitary gland.
While this answer may provide helpful information regarding your assignment, it is important to remember that using it verbatim could be seen as plagiarism. To avoid this, it is best to cite your sources and use your own words to ensure a better answer.
~~~Harsha~~~
The basic proposition of the epidemiologic transition theory is that the increases in life expectancy have been caused primarily by changes in the age distribution of
The basic proposition of the epidemiologic transition theory is that increases in life expectancy have been caused primarily by changes in the age distribution of the population.
This is due to shifts in the leading causes of mortality from infectious and communicable diseases to non-communicable and chronic diseases. As societies advance and public health improves, the burden of disease shifts to older age groups, contributing to increased life expectancy.
In the early stages of development, societies typically experience high mortality rates due to infectious and communicable diseases such as pneumonia, tuberculosis, and diarrheal diseases.
These diseases tend to affect people of all ages, including infants and children, resulting in relatively low life expectancies.
As societies advance and public health measures improve, there is a decline in mortality rates from infectious diseases. This decline is often accompanied by improvements in sanitation, nutrition, and access to healthcare.
As a result, people are more likely to survive into adulthood, and the burden of disease begins to shift towards non-communicable and chronic diseases.
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The basic proposition of the epidemiologic transition theory is that the increases in life expectancy have been caused primarily by changes in the age distribution of diseases and mortality patterns within a population and improvements in public health measures.
Xixuthurus heros, the giant fijian longhorn beetle, is the world's second largest beetle, with specimens reaching up to 150 mm in body length. assume body length for x. heros beetles is normally distributed with =80mm and σ=30mm. what proportion of the population will range between 50 and 110mm in body length?
Approximately: 68.26% of the population of Xixuthurus heros beetles will range between 50 and 110mm in body length.
To find the proportion of the population that will range between 50 and 110mm in body length, we need to standardize the values using the z-score formula:
z = (x - μ) / σ
where x is the value we want to find the proportion for,
μ is the mean, and
σ is the standard deviation.
For x = 50mm:
z = (50 - 80) / 30 = -1
For x = 110mm:
z = (110 - 80) / 30 = 1
Using a z-table or calculator, we can find the area under the standard normal distribution curve between z = -1 and z = 1 to be approximately 0.6826.
Therefore, approximately 68.26% of the population of Xixuthurus heros beetles will range between 50 and 110mm in body length.
In summary, the z-score formula is used to standardize values in a normal distribution, and a z-table or calculator can be used to find the proportion of values between two z-scores.
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phytoplankton blooms: spring brings warmer temperatures and increased sunlight, creating a thermocline that traps nutrients at the ocean surface. this allows phytoplankton to absorb energy and take in the nutrients they need to photosynthesize and multiply. the warming of the surface layer keeps this water less dense, so it stays afloat. phytoplankton respond very quickly when the right conditions occur, growing and reproducing as soon as a slight stratification of the water column occurs. as phytoplankton continue thriving in the nutrient-rich surface zone where they receive sunlight, they may become so plentiful that the ocean waters turn green, brown, or red from the chlorophyll they contain. as the phytoplankton use up the available nutrients, however, they begin to die and drift to the bottom. as autumn begins, cooler days cause some vertical mixing that may bring nutrients up from below resulting in a relatively smaller fall bloom. once winter begins, plummeting temperatures and frequent storms cause heavy mixing. as phytoplankton do not remain at the surface in this mix, they do not have ready access to sunlight, so blooms do not occur in the winter. based on this information and the evidence for when stratification and a well mixed water column occur, which two months in 2012 would you hypothesize that phytoplankton blooms would occur in?
The two months in 2012 that we would hypothesize that phytoplankton blooms would occur in would be April and May.
Phytoplankton blooms occur when the population of a certain type of phytoplankton increases rapidly in an aquatic environment. This usually occurs when the environment is nutrient-rich, meaning there are plenty of nutrients available for the phytoplankton to consume and reproduce.
The reason this is considered a bloom is because such rapid growth can lead to large patches of green or brown algae floating on the surface of lakes and oceans. These blooms are beneficial and provide food for many animals, as well as help remove carbon dioxide from our atmosphere.
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Your science teacher takes a batch of peppered moths to an environment with an entirely different color , like rainforest, where the predominant color is green. After several generations, you would predict that ?
If the science teacher takes a batch of peppered moths, which are adapted to an environment with light-colored tree trunks, to a rainforest environment with green tree trunks, it is likely that the phenotype of the moths will change in response to the new environment.
The moths that have a genetic variation that makes them better camouflaged against the new environment will be more likely to survive and reproduce, passing on their advantageous traits to the next generation.
Over several generations, the frequency of the advantageous traits will increase, while the frequency of the less advantageous traits will decrease.
This is an example of natural selection, where the environment acts as a selective pressure on the population, driving changes in the frequency of traits over time.
The result could be moths with a different coloration pattern, better suited for the new environment.
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Which is a consequence of global warming?cooling oceansgrowing glaciersless frequent hurricanesrising sea levels
The consequence of global warming is rising sea levels.
As the Earth's temperature increases due to the accumulation of greenhouse gases in the atmosphere, the melting of ice sheets and glaciers causes the sea levels to rise.
This rise in sea levels can lead to increased flooding, erosion, and loss of habitat for coastal ecosystems and wildlife. Additionally, as sea levels rise, saltwater intrusion can occur in coastal aquifers, affecting freshwater resources.
The increase in temperature can also cause changes in ocean currents and weather patterns, leading to more frequent and intense hurricanes, typhoons, and cyclones. It is crucial to reduce greenhouse gas emissions and implement measures to adapt to the impacts of global warming to prevent further damage to the Earth's ecosystems and the well-being of its inhabitants.
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How does your medical issue affect the integumentary system?
Answer:
Atopic Dermatitis
It is a skin disease causing much itchiness. Scratching leads to redness, swelling, cracking, weeping clear fluid, crusting, and scaling
Answer:
Atopic Dermatitis
What is Atopic Dermatitis?
It is a skin disease causing much itchiness. Scratching leads to redness, swelling, cracking, weeping clear fluid, crusting, and scaling.
What happens if there is an issue with the integumentary system?
The integumentary system is susceptible to a variety of diseases, disorders, and injuries. These range from annoying but relatively benign bacterial or fungal infections that are categorized as disorders, to skin cancer and severe burns, which can be fatal.
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Question 2
Juanita learns that gray tree frogs and green tree frogs both live in the southern United States. However, the two types of frogs
have different coloring. The gray tree frogs live in forests, and they blend in with the bark on the trees. The green tree frogs are
green and blend in with the tall reeds and grasses of the wetland areas. Natural selection helps the gray tree frogs in the forests
and the green tree frogs in the wetlands.
Natural selection is affected by which factors? Choose the three answers that apply.
Select 3 correct answer(s)
variation
mechanism
reproduction
evolution
overproduction
competition
Answers is variation. Overproduction. Competition
Natural selection plays an important role in the survival of both gray tree frogs and green tree frogs. Variation is the first necessary factor for natural selection. For the gray tree frogs, variations in color allow them to blend in with the bark of the trees in their forest environment.
Here, correct Answers is variation, Overproduction, Competition.
For the green tree frogs, variations in color allow them to blend in with the tall reeds and grasses of their wetland environment. The overproduction of these frogs is also necessary for natural selection to occur. With more frogs, the competition for resources and mates increases, forcing them to adapt and evolve in order to survive.
Finally, reproduction is necessary for natural selection. If the frogs cannot reproduce, the species will die out and natural selection will not be able to take place. Natural selection is a powerful mechanism that helps these frogs to survive in their respective environments.
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Which of the options below describe the
walls of veins?
thick muscle layer & large elastic layer
thin smooth muscle & small elastic layer
only one cell thick
Answer:
B
Explanation
Veins have thinner and less muscular walls. This is due to the fact that veins have a lower level of pressure than arteries. So, their walls don't need to be as thick to handle the pressure.
What is problematic about the way that people tend to contrast girls soccer and football
There are a number of problematic issues with the way that people tend to contrast girls soccer and football. Firstly, many people assume that soccer is a "softer" or less physical sport than football, and therefore not as challenging or competitive. This perception is based on outdated and sexist stereotypes about girls and women, and completely disregards the skill, athleticism, and toughness required to excel in soccer.
Secondly, the emphasis on physicality in football often leads to a culture of aggression and violence that can be harmful to players and coaches alike. In contrast, soccer places a greater emphasis on finesse, teamwork, and strategic thinking, creating a more positive and inclusive environment for players of all genders.
Finally, the persistent gender binary that separates "girls" sports from "boys" sports reinforces harmful stereotypes about gender and limits opportunities for girls and women to participate in and excel at traditionally male-dominated sports like football. By celebrating and valuing girls soccer on its own terms, rather than in comparison to boys football, we can create a more equitable and inclusive sports culture that supports the development and success of all athletes.
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Describe the function of each organelle
Ribosome
Answer:
Ribosome, a large-number-of-ribosomes-present particle that is essential for protein synthesis in all living cells. Prokaryotic and eukaryotic cells both include free ribosomes, and eukaryotic cells also contain ribosomes that are affixed to the endoplasmic reticulum membranes. George E. Palade, an American cell scientist of Romanian descent, first identified the microscopic particles that would later be known as ribosomes in 1955. He discovered that these particles were commonly connected to the rough endoplasmic reticulum of eukaryotic cells.
Explanation:
Cells have a remarkable number of ribosomes. For instance, a single eukaryotic cell that is actively reproducing may have up to 10 million ribosomes. As many as 15,000 ribosomes—a prokaryote—can be found in the bacterium Escherichia coli, accounting for as much as one-fourth of the mass of the cell. Depending on the cell type and variables like whether the cell is resting or reproducing, the size of the ribosomes within cells varies. The best-characterized example, the typical ribosome of E. coli, has a diameter of roughly 200 angstroms (or 20 nm).
19 What is the ultimate source of energy that drives this food chain?
A. the zooplankton
B. the great white shark
C. the phytoplankton
D. the Sun
Answer:
D
Explanation:
Not sure if there was supposed to be an image with this. Nearly energy from the Earth comes from the sun ultimately.
A molecule that donates electrons becomes ______, and a molecule that accepts electrons becomes _________.
oxidized; reduced
reduced; oxidized
ionic; electrified
electrified; ionic
When a species fails to produce any more
descendants, it is said to
A. be extinct
B. be divergent
C. have speciated
D. have become isolated
Answer:
When a species fails to produce any more descendants, it is said to be extinct .
Explanation:
If a single cycle of PCR takes 5 minutes, it should it take _______ minutes to amplify one double-stranded molecule into 64
If a single cycle of PCR takes 5 minutes, it should it take 30 minutes to amplify one double-stranded molecule into 64
PCR (Polymerase Chain Reaction) is a laboratory technique that can be used to amplify DNA fragments. In each cycle of PCR, the amount of DNA is doubled.
Therefore, to determine how long it would take to amplify one double-stranded molecule into 64 molecules, we need to calculate the number of cycles required.
To amplify one double-stranded molecule into 64, it would require 6 cycles of PCR since 2^6 = 64.
If each cycle of PCR takes 5 minutes, then 6 cycles would take a total of 30 minutes (6 cycles x 5 minutes per cycle). Therefore, it would take 30 minutes to amplify one double-stranded molecule into 64 using PCR.
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New zealand is home to many flightless birds like the kiwi.
the kiwi has two very small rudimentary wings that serve no
present-day purpose. until humans arrived to new zealand
1000 years ago, there were no mammalian predators for
birds. explain what caused wings to become vestigial
structures on flightless birds like the kiwi.
Natural selection and adaptation caused wings to become vestigial structures on flightless birds like the kiwi.
The evolution of flightless birds is an example of natural selection at work.
In the absence of predators, birds that were better adapted to life on the ground had a survival advantage over those that still relied on flight. This led to the gradual evolution of smaller, less developed wings in flightless birds, which were not needed for survival and reproduction.
Flightless-ness is a common adaptation among birds that live in environments where there are no natural predators, or where there is an abundance of food on the ground.
In the case of New Zealand, before human arrival, there were no mammalian predators that posed a significant threat to birds. As a result, many bird species on the islands evolved to become flightless, including the kiwi.
Over time, flightless birds that did not need to fly in order to escape predators or find food became adapted to their terrestrial environments.
The wings of these birds gradually became smaller and less developed, as there was no evolutionary pressure to maintain the large and strong wings needed for flight.
Eventually, these wings became vestigial structures, serving no present-day purpose, as is the case with the kiwi.
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Which organ releases salt and liquid waste from the body through its pores and glands?.
The skin is the organ that releases salt and liquid waste from the body through its pores and glands.
The skin contains sweat glands that release sweat, which consists of water, salts, and other waste products such as urea and ammonia. The release of sweat through the pores of the skin helps regulate body temperature and remove excess salt and waste products from the body.
In addition, the skin also plays a role in the excretion of certain drugs and toxins. Therefore, the skin serves as an important organ of the excretory system, along with other organs such as the kidneys, liver, and lungs.
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1. Draw the cross section of the leg bones in the circles provided.
BIRD (CHICKEN) BONE
MAMMAL (COW) BONE
Answer: This should be the answer :)
Explanation:
sorry my screenshot is blurry