What is phloem?
What does it phloem carry?
Explain the function of sieve tubes and their association with companion cells.
What is translocation?
Explain how pressure and water potential aid translocation.
How can aphid stylets be used to measure phloem transport rates?
How can radioactively-labeled CO2 be used to measure phloem transport rates?
Answer:
Explanation:
Phloem is a specialized tissue in vascular plants that is responsible for the transport of organic compounds, such as sugars, amino acids, and hormones, from the leaves to other parts of the plant.
Phloem carries organic nutrients and hormones, produced by photosynthesis or other metabolic processes, from the leaves to the other parts of the plant, such as roots, stems, and flowers.
Sieve tubes are specialized cells found in phloem tissue that form a series of connected tubes for transporting nutrients throughout the plant. Companion cells are specialized cells that are adjacent to sieve tubes and provide them with metabolic support.
Translocation is the process by which organic compounds are transported through the phloem from the source to the sink. The source is typically the leaf, where sugars and other organic compounds are produced, while the sink is any other part of the plant where the compounds are used or stored, such as roots, stems, or flowers.
Translocation is facilitated by pressure and water potential gradients created by the active transport of sugars and other organic compounds from the source to the sink. As sugars are actively transported into the phloem, water follows by osmosis, creating a pressure gradient that moves the organic compounds toward the sink.
Aphid stylets can be used to measure phloem transport rates by inserting them into the phloem tissue and measuring the flow rate of the sap. This technique is commonly used in plant physiology research.
Radioactively-labelled CO2 can be used to measure phloem transport rates by exposing the source leaf to radioactively-labelled CO2 and then measuring the accumulation of the radioactive compounds in the sink tissue. This technique is used to track the movement of specific compounds through the phloem and to determine the rate of translocation.
PLS MARK ME BTRAINLIEST
what would happen if cells stop to respire?
Explanation:
the electrons flow throw it
The sodium-potassium pump
A. maintains electrochemical gradients by pumping 3 Na* ions outward and 2 K* ions inward.
B. is an example of passive transport.
C. is used routinely for moving a substance out of a cell.
D. is an example of facilitated diffusion.
Answer:
A
Explanation:
The sodium-potassium pump is used for balancing charges through the movement of Na and K ions
Complete the sentence. Noise pollution
O raises hearing acuity
Oincreases stress hormones
lowers blood pressure
leads to complete deafness
Answers:
Increases stress hormones
Explanation:
Choice one does not work because noise pollution does not increase hearing acuity, it lessens it.
Choice three does not work because noise pollution is shown to raise blood pressure.
Complete deafness is rare, so I would not choose the last choice.
In a long‑term study of a population of gray squirrels, researchers observed that most of the squirrels had gray fur. However, there were some individuals in the population with white fur (albino). Genetic analysis revealed that the albino condition is expressed by individuals who are homozygous recessive (gg). Over a ten-year period, the average frequency of albino squirrels in the population was 0.18. If the population is assumed to be in Hardy-Weinberg equilibrium, the average frequency of the dominant allele is closest to which of the following?
The average frequency of the dominant allele is closest to 0.52.
According to the Hardy-Weinberg equilibrium, the frequency of alleles in a population remains constant over generations, and the sum of the frequencies of all alleles must equal 1. Let p be the frequency of the dominant allele (G) and q be the frequency of the recessive allele (g). Then, p + q = 1.
Given that the frequency of homozygous recessive individuals (gg) is 0.18, we can use the Hardy-Weinberg equation to calculate the frequency of the recessive allele:
q² = 0.18Taking the square root of both sides gives us:
q = 0.424Since p + q = 1, we can calculate the frequency of the dominant allele:
p = 1 - q = 0.576Therefore, the average frequency of the dominant allele is closest to 0.52 (rounded to two decimal places).
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What data did the tests on the purfied substance produce? How did this data further support the hypothesis that DNA is the transforming factor?
Answer:
The tests on the purified substance revealed that it contained high levels of phosphorus and very little sulfur. This finding was significant because DNA contains high levels of phosphorus but very little sulfur, while proteins contain high levels of sulfur but very little phosphorus. This data further supported the hypothesis that DNA was the transforming factor, as it suggested that the substance being studied was DNA rather than a protein. This was because the levels of phosphorus found in the purified substance were consistent with what would be expected from DNA, while the levels of sulfur were not consistent with what would be expected from a protein. Therefore, the data from the tests on the purified substance provided strong evidence that DNA was the transforming factor.
What are the environmental and societal benefits of cultured meat production compared to traditional meat production?
Answer:
Cultivated meat water usage can be reduced by 82%-96% depending on the product. Cultured meat production uses considerably fewer water resources compared to conventional meat production. Research has shown that agriculture is responsible for 92% of our water usage, and that.
Explanation:
The book named Principles of Geology, which influenced Darwin, was written by
Answer:
Principles of Geology, which influenced Darwin, was written by Charles Lyell
Explanation:
what is gastulaton stage in development of a chick?
Answer:
Gastrulation is an early stage in embryo development in which the blastula re-organizes into the three germ layers : the ectoderm, the mesoderm and the endoderm.
Explanation:
hope this helps:) !!!!!
What is the difference between extant and extinct?
Answer:
Extinct refers to species no longer in existence, having no living representatives – gone everywhere.
Extant The species is known or thought very likely to occur currently in the area.
Question 3 of 25
How are genes and proteins related?
O
O
O
A. Genes and proteins are both made of DNA.
B. Proteins are made from instructions in genes.
C. Proteins are made of parts of genes.
D. Proteins are used to build genes.
Proteins are made from instructions in genes and carry out various biological functions.
(B). Proteins are made from instructions in genes.
Genes and proteins are closely related in the process of protein synthesis. Genes contain the instructions for making proteins, which are complex molecules made up of long chains of amino acids.
The sequence of bases in DNA determines the sequence of amino acids in a protein.
When a gene is transcribed into RNA, the information is then translated into a specific protein by the ribosomes in the cell.
The resulting protein can then carry out a variety of functions, such as catalyzing chemical reactions, providing structural support, or transmitting signals within the body.
Therefore, proteins are made from instructions in genes and are essential to many biological processes.
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Describe how Newton's 1st Law of Motion is used on a daily basis at school?
16 Which of the following provides evidence that objects draw energy from the systems around them? F Storms often occur when an area has experienced high heat and high humidity. G Hurricanes form and strengthen over warmer water but lose energy over cocter water. H Thunderstorms can release massive amounts of energy in the form of lightning bolts. J Although tornadoes can be extremely destructive, most do not last more than ten minutes.
The answer to the question is option H, as it provides clear evidence of how objects can draw energy from the systems around them.
When answering questions on Brainly, it is important to always be factually accurate, professional, and friendly. Answers should be concise and not provide extraneous amounts of detail. Typos or irrelevant parts of the question should be ignored.
Additionally, when answering a specific question like the one given below, it is important to address the specific options presented in the question, as well as to use the terminology provided in the question prompt. In this case, the answer to the question is option H:
Thunderstorms can release massive amounts of energy in the form of lightning bolts. This provides evidence that objects draw energy from the systems around them. Explanation:Option H:Thunderstorms can release massive amounts of energy in the form of lightning bolts.
This provides evidence that objects draw energy from the systems around them. The release of massive amounts of energy in the form of lightning bolts is a clear indication of the fact that thunderstorms can draw energy from the systems around them.
Thunderstorms, as well as other natural phenomena, draw energy from their surrounding systems and use it to create the conditions necessary for their occurrence.
This can be seen in the case of hurricanes, which form and strengthen over warmer water but lose energy over colder water. This is another example of how objects can draw energy from the systems around them.
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%. When a few individuals become isolated from a larger population and establish a new one whose gene pool is not reflective of the source population is called
Genetic drift and tends to lead to a loss of genetic diversity
b. Genetic drift and tends to lead to an increase in genetic diversity
c. Gene flow and tends to lead to a reduction in genetic differences between the populations
d. Gene flow and tends to lead to an increase in genetic differences between the populations
Answer:The answer is D
This question: 1
point(s) possible
This passage, Aquatic Food Supplies, is from a geography textbook
Review the passage as needed
Subr
What is the implied meaning of this statement from paragraph 47
A deluge of modern, highly capitalized fishing threatens to drown traditional fisherman in a sea of despair
A. Certain hardshes and experiences are shared by people who practice traditional fishing methods
B Severe storms present a great risk to people who practice traditional fishing methods
Nex
This passage shows that certain difficulties and experiences are shared by people who practice traditional fishing methods, as shown in option A.
What does the passage show?Fishing methods have evolved and modernized.Traditional fishing has lost space in the market.The text shows how the techniques and resources used to promote fishing have been modernized and become faster and more efficient to contain the demands of the capitalist market.
Traditional fishing has not been able to keep up with this evolution, which has created difficulties for traditional fishermen who have traditional fishing as their main source of income.
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Help please, view attachment
Answer:
The answer is C. This model is showing Fusion, when two smaller particles combine and create one big particle, and there always has to be a release of a neutron
What causes the "rumbling" of thunder?
Lightning strikes in waves, creating multiple rounds of thunder.
The sound waves behave differently within air that is high in humidity.
The sound waves bounce off trees, buildings, and other objects after the lightning is struck.
Thunder bounces off the bottom of the thunderstorm cloud.
Place the jumbled steps of muscle contraction in proper order
Below are the steps of muscle contraction in the correct order:
The nervous system sends a signal, called an action potential, down a motor neuron.Others are:
The action potential causes the release of a neurotransmitter called acetylcholine (ACh) into the neuromuscular junction.ACh binds to receptors on the muscle fiber's membrane, which opens ion channels that allow sodium (Na+) ions to enter the cell.The influx of sodium ions creates an electrical current that spreads throughout the muscle fiber, causing it to depolarize.The depolarization triggers the release of calcium (Ca2+) ions from the sarcoplasmic reticulum (SR) within the muscle fiber.The calcium ions bind to troponin, which causes tropomyosin to move away from the myosin binding site on actin.Myosin heads bind to the exposed binding sites on actin, forming cross-bridges.The myosin heads pivot, pulling the actin filaments towards the center of the sarcomere (power stroke).ATP binds to the myosin head, causing it to detach from the actin filament.The process of myosin binding, power stroke, and detachment continues as long as calcium ions are present and ATP is available.When the action potential ceases, the muscle fiber repolarizes and calcium ions are actively transported back into the SR, causing the tropomyosin to block the myosin binding sites again.Lastly, The muscle fiber relaxes as the tension in the sarcomere decreases.
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a) What are the bases of mRNA coded for by this section of DNA, before the
mutation? Hint: In RNA, A pairs with U.
Answer:
DNA, before the
mutation? Hint: In RNA, A pairs with U.
UNIT 6 LAB
Forensic Advances Raise New Questions About Old Convictions
What happened during William Richards first three trials? What was his sentence?
In the fourth trial, what did the forensic dentist tell the jury? What does this same dentist feel about his testimony in hindsight?
Explain how as technology evolves, forensics experts’ testimony will evolve as well.
Do you think Richards deserves another trial? Why or why not?
In Texas, A Living Lab for Studying the Dead
Describe the Forensic Anthropology Center at Texas State University.
What have the researchers already discovered about the set of human remains that have been in the trench since February?
Why does Ms. Nugent study forensic anthropology?
What do the students do at the site? What happens to the bones?
Would you be interested in studying in a research center like this one? Why or why not?
In Rwandan Mass Graves, There are Few Ways to Identify the Dead
What elements do forensic anthropologists look for in order to help identify the victims in the mass grave?
What about Rwanda makes this work more unique than one might typically expect?
Regarding "In Texas, A Living Lab for Studying the Dead," the Forensic Anthropology Center at Texas State University is a research facility that studies the decomposition of human remains under various conditions to aid in forensic investigations. Researchers at the center study human decomposition to estimate time since death, determine cause of death, and identify individuals based on skeletal remains.
How to explain the informationThe set of human remains in the trench at the center since February is being used to study the effects of scavenger activity on human remains in a tropical environment. Researchers are interested in how this type of environment affects decomposition rates and patterns.
Ms. Nugent studies forensic anthropology to help families find closure by identifying the remains of their loved ones. She is also interested in the forensic aspects of anthropology and the important role it plays in criminal investigations.
At the site, students participate in the excavation and recovery of the remains, as well as the analysis of the skeletal remains in the lab. After analysis, the bones are respectfully returned to the grave.
Regarding "In Rwandan Mass Graves, There are Few Ways to Identify the Dead," forensic anthropologists look for various elements to identify victims, including dental records, DNA analysis, and skeletal features. They also look for clothing and personal effects that may provide clues to the identity of the victims.
In Rwanda, the unique challenge is the sheer number of victims and the extent of their fragmentation, which makes identification more difficult. Additionally, the remains may have been disturbed or moved over time, further complicating the identification process.
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The plant shown in the photo is a vine. It can grow where
there are many other plants and plenty of water year-
round.
alla
C) The type of ecosystem that is more likely to have a large number of vines that can grow where there are many other plants and plenty of water year-round is a rainforest.
Rainforests are among the most biologically different ecosystems on Earth, home to millions of species of shops and creatures, numerous of which are set up nowhere differently. Vines are an important element of the rainforest ecosystem, serving as a source of food, sanctum, and niche for numerous creatures.
Some exemplifications of common rainforest vines include lianas, which can climb up to the cover of trees and give a ground for creatures to cross from one tree to another, and epiphytes, which grow on trees and can give a home for insects, catcalls, and other brutes. still, rainforests are under trouble from deforestation, niche destruction, and climate change.
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Richard knows he's a take-charge kind of person. He is a good student, and knows it is because of his hard work. What type of attribution is he using, and why do you think this is?
Richard is using an internal attribution, as he attributes his success to his own abilities and efforts rather than external factors.
Attribution theory refers to the process by which individuals explain the causes of events and behaviors, including their own. Internal attribution refers to the explanation of behavior in terms of an individual's own abilities, traits, or efforts, while external attribution refers to the explanation of behavior in terms of situational or environmental factors. In the case of Richard, he is using an internal attribution by attributing his success as a good student to his own hard work and abilities, rather than to external factors such as luck or help from others.
This suggests that Richard has a strong sense of control and agency over his own life and achievements, and believes that he can influence the outcomes of his own actions through his efforts and skills. This type of attribution can be empowering and motivating, as it reinforces a sense of personal responsibility and ownership over one's life outcomes.
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The theory, now generally held, that an embryo develops progressively from an undifferentiated cell is called
what type of skeletons do jellyfish have
Answer: they have a hydrostatic skeleton- their bodies are supported by hydrostatic pressure from a fluid-filled cavity surrounded by muscles. Technically they have no actual skeleton.
Explanation:
What combination of processes can transform a metamorphic rock to sediments?
a.
erosion, crystallization, and melting
b.
heating, pressure, and lithification
c.
melting, crystallization, and compaction
d.
exposure, weathering, and erosion
Option D Exposure, weathering, and erosion is the correct answer. It is the combination of processes that can transform a metamorphic rock into sediments.
Metamorphic rocks are shaped by the change of pre-existing rocks (molten, sedimentary, or other metamorphic rocks) through warm, pressure, and/or chemical forms. To convert a metamorphic rock to sediments, the rock ought to be uncovered to the surface and experience weathering and disintegration forms.
Exposure alludes to the method of bringing the transformative rock to the Earth's surface. This could happen through structural elevations, disintegration of overlying rocks, or volcanic action. Once the rock is uncovered, weathering processes break down the rock into littler parts or sediments. This may happen through physical or chemical weathering, such as the activity of water, wind, ice, or chemical responses with air or water.
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come up with a good question connected to an area of concern regarding food waste
What are some practical solutions that can be implemented to reduce food waste in the food service industry, and how can these solutions be effectively communicated to consumers to encourage more sustainable practices?
~~~Harsha~~~
Which mode of nutrition do the cotton like threads formed on the moist bread have
Answer:
Heterotrophic mode of nutrition
Explanation:
A grassland ecosystem experiences an especially rainy year. During the same
year, the rabbit population in the grassland increases sharply. What is the
most likely reason for this increase?
A. The ecosystem's carrying capacity is lower, so fewer rabbits have
immigrated and more have died.
B. The ecosystem's carrying capacity is higher, so fewer rabbits have
been born and more have emigrated.
C. The ecosystem's carrying capacity is lower, so more rabbits have
emigrated and fewer have been born.
D. The ecosystem's carrying capacity is higher, so more rabbits have
been born and fewer have died.
Answer: C.
Explanation:
The ecosystem's carrying capacity is lower, so more rabbits have
emigrated and fewer have been born.
Natural selection is a process by which organisms that are better adapted to their environment tend to
increase in size.
migrate.
evolve new traits.
survive.
Mark this and return
Answer:
Survive is the correct answer
Explanation:
Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others. Individuals with adaptive traits—traits that give them some advantage—are more likely to survive and reproduce. These individuals then pass the adaptive traits on to their offspring. Over time, these advantageous traits become more common in the population
Which of the following is NOT one of the factors that affects our appraisal of a
stressor?
The factors that affect our appraisal of a stressor include timing, control, significance, and physical proximity.
Option (E) is correct.
A) Timing: This factor refers to the duration and frequency of the stressor. A stressor that occurs frequently or lasts a long time may be appraised as more stressful than a stressor that is short-lived or happens infrequently.
B) Control: This factor refers to the degree to which we believe we have the power to manage or cope with the stressor.
C) Significance: This factor refers to the importance we place on the stressor and its potential consequences.
D) Physical proximity: This factor refers to how physically close we are to the stressor. A stressor that is happening nearby or that we are directly exposed to may be appraised as more stressful than a stressor that is happening far away or that we are not directly exposed to.
E) All of the above: This answer choice states that all of the factors listed (timing, control, significance, and physical proximity) affect our appraisal of a stressor. This is the correct answer because each of these factors plays a role in how we perceive and respond to a stressor.
Therefore, the correct option is (E)
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The question is incomplete. the complete question is:
Which of the following is NOT one of the factors that affects our appraisal of a stressor?
A) Timing
B) Control
C) Significance
D) Physical proximity
E) All of the above factors affect our appraisal of a stressor