Answer:
Antibiotics, also known as antibacterials, are medications that destroy or slow down the growth of bacteria. They include a range of powerful drugs and are used to treat diseases caused by bacteria. Antibiotics cannot treat viral infections, such as cold, flu, and most coughs.
Explanation:
What methods do cells use to increase the surface area to volume ratio?
Prokaryotic cells have inner folds of the cell membrane that are responsible for specific functions such as respiration. These creases increase the surface area.
As the cell radius increases, the surface area increases as the radius squared, but the volume increases as the radius cubed (much faster).
As the cell advance, its internal volume increases and the cell membrane expands. Unfortunately, volume increases faster than surface area, so the relative amount of surface area available to direct material to a unit volume of cells steadily decreases. The important point is that the surface area-to-volume ratio decreases as the cells get larger.
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What is the role of producers in environment ?
How does exposure to water affect the arrangement of the phospholipids?
It causes the heads to point towards the exterior and the tails to point towards the interior of the cell.
It causes the heads to point towards the interior and the tails to point towards the exterior of the cell.
It causes a bilayer to form with the tails pointing away from the center of the membrane.
It causes a bilayer to form with the tails pointing toward the center of the membrane.
Answer:
It causes a bilayer to form with the tails pointing toward the center of the membrane.
Explanation:
It is due to the tails being hydrophobic and the heads being hydrophilic. Also it is called a "phospholipid bilayer" sooo... hope this helps!
The term that refers to the presence of a tuft of flagella emerging from a single site is ______.
A. amphitrichous
B. lophotrichous
C. peritrichous
D. atrichous
E. monotrichous
Vlophotrichous Cell Biology describes tufts of flagella that are located near the cell pole.
How do flagella work? What are they made of?Flagella are tiny organelles that resemble hairs and aid in cell movement. In Latin, "flagellum" means "whip." A cell is helped to move through the fluid by the flagella, that resemble whips. Only a few number of organisms have special flagella that serve as sensing organs for temperature and pH changes.
What is a flagella cell?The flagellum's main purpose is to promote chemotaxis and movement. Bacteria can have one or more flagellums, and they can also be peritrichous or bipolar (containing several flagella at a single site) (having multiple flagella throughout the entire bacterium).
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need help asap
question 3
- 20 points
what do you think? So why don't t apes walk upright like us?
Apes were basically monkeys. They walk on their hands and feet but crouched. There's a bunch of theories saying that humans evolved from apes. As apes evolved, they started walking upright.
The relative movements of Earth, the Moon, and the Sun create patterns of change we observe.
A complete and accurate model for explaining the phases of the Moon visible on Earth requires which of the following?
Select all that are needed.
- sun
-earth
- moon
The Sun constantly illuminates one-half of the Moon, but the amount of this half that we can view from Earth determines the phase that we observe. the phases of the Moon visible on Earth requires the sun, earth, and moon.
What are the phases of the Moon?Only the "night" side of the Moon is visible during the new moon. if there is a full moon, the Moon will rise just before dusk.
About two weeks pass between the new moon and the full moon. At the new moon, the luminous portion of the Moon that faces the Sun is complete.
Therefore, the many moon forms that are visible from Earth are referred to as phases of the moon.
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How much greater are the discharge rates than the recharge rates of the Ogallala Aquifer?
The recharge rate of the Ogallala Aquifer is estimated to be between 0.1 and 0.2 inches per year.
What is Ogallala Aquifer?
The Ogallala Aquifer is a vast underground aquifer system located in the Great Plains region of the United States. It is one of the world's largest aquifers, covering an area of around 174,000 square miles across eight states, from South Dakota to Texas. It is an important source of water for agricultural, industrial, and municipal uses.
The discharge rate is estimated to be between 0.3 and 0.6 inches per year. This means that the discharge rate is between three and six times greater than the recharge rate.
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This website is so bad like i asked help for something yesterday legit, and i got warned just take my points guys. es
Answer:
The number of moles of acid that were neutralized can be found by multiplying the volume of the base (in liters) by its concentration (in moles/liter) and then multiplying that value by the stoichiometric coefficient of the acid in the balanced chemical equation for the neutralization reaction.
Explanation:
To begin, we need to convert the volume of the base from milliliters to liters.
50.40 mL = 0.0504 L
Next, we can multiply the volume of the base (in liters) by its concentration (in moles/liter) to find the number of moles of base used in the titration.
0.0504 L * 0.542 M = 0.0272 moles
Since this is a neutralization reaction between a monoprotic acid and a strong base, the acid:base ratio is 1:1.
So the acid that has been neutralized is also 0.0272 moles.
Answer: Why
Explanation: That isn't good. I hope you have a good rest of your day!
What essential criteria must be met in order to execute a successful mapping cross? (Select all the statements that apply.)
A. One parent should be heterozygous and the other homozygous recessive for all the genes being mapped.
B. The genotypes of the offspring must be readily determined from their phenotypes.
C. One parent should be homozygous dominant and the other homozygous recessive for all the genes being mapped.
D. Recombination must occur in the sex that displays genetic heterogeneity.
The genotypes of the offspring must be readily determined from their phenotypes.
What is the genotypes of AA?A heterozygous individual has two different alleles. Therefore it would have the genotype Aa. An individual with the genotype Aa can make two types of gametes: A and a. Since this is a random process, the individual will, on average, make equal numbers of each gamete.
What is a genotype and give an example?A genotype is a scoring of the type of variant present at a given location (i.e., a locus) in the genome. It can be represented by symbols. For example, BB, Bb, bb could be used to represent a given variant in a gene.
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How do you find the effort force of a second class lever?
In a class two lever the force of the effort multiplied by the distance of the effort from the fulcrum is opposite and equal to the force of the resistance multiplied by the distance of the resistance from the fulcrum.
The force utilized to move an object across a distance is called an effort force. To use a rudimentary machine to perform work on an item, this force must be overcome. By dividing the load by the number of ropes, we may get the pulley's effort force. F is the effort force in the diagram.
For instance, when using a shovel, you hold one end stable to serve as the fulcrum and pull up on a load of soil with your other hand. The resistance force is the dirt being picked up, and the effort force is the second hand.
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explain the biological principle behind the preservation of meat by salting
True or False: An action potential in one section of the membrane can cause the initiation of an action potential in adjacent sections of the membrane.
True , This is the concept of axonal action potential propagation! Positive charges accumulate on subsequent regions of the membrane as a result of depolarization caused by an initiated action potential on one segment of the axon.
This local depolarization can cause an action potential to move along the axon by causing depolarization along the neighboring segment of the membrane.
Voltage-gated sodium channels open and close in milliseconds. As the cell membrane depolarizes, sodium channels open, allowing sodium ions to enter and further depolarize the membrane. This inward current causes the action potential to rise.
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If the results from a scientific experiment do not support the hypothesis, then the experiment
A
is a failure.
B.
can be revised.
C.
must be done again.
D
should be continued without the hypothesis.
Answer:
D
Explanation:
Question 22 of 22 Several members of the family in the pedigree who suffered from a disease are colored in black. Currently deceased members of the family are struck out with a line. Based on the data in the pedigree, propose a Mendelian model that would explain the inheritance of this disease. Explain how the data is consistent with your model. A scientist hypothesizes that a mutation at a single locus is responsible for the pattern of inheritance seen in this pedigree. Explain how a mutation in a gene can arise during meiosis. Describe one strategy organisms use to prevent such mutations from arising.
A. Many families have Alzheimer's disease. From this we conclude that the disease is X-linked recessive.
B. Meiosis is the process of generating gamete cells. There are two choices: mutual break join and another non-reciprocal break copy.
Many families are affected by Alzheimer's disease. It cannot be autosomal inherited because it affects more men than women. Affected males in the second generation have many affected children with normal wives.
If it was autosomal dominant, the sick father would have passed it on to all his second-generation children, but that is not the case. Therefore, it cannot be autosomal dominant.
If it had been autosomal recessive, he would not have affected his children, as his wife appears normal. increase. Therefore, it is not an autosomal abnormality.
Not X-linked dominant, in which case the affected father passed his only X chromosome to his daughter, making her daughter sick. But in this case, the sons are involved. Therefore, it is not X-linked dominant.
From this we conclude that the disease is X-linked recessive.
B. Meiosis is the process of generating gamete cells. Mutations can occur during meiosis in various ways such as double-strand breaks, inversions and point mutations. Important mutation types include missense, nonsense, and point mutations. Cells use multiple repair mechanisms to repair DNA damage or mutations during meiosis. One of the most efficient mechanisms is double-strand break repair by homologous recombination (HR).
Here, the DNA is unwound at the mutated region by recA loading. Recombination with homologous pairs continues through the RecBCD complex.
Here are his two alternatives: reciprocal break join and another non-reciprocal break copy.
Repair normally occurs during her S phase of the cell cycle, when the cell divides its DNA. However, mutations that occur during meiosis, such as chromatid pairing and recombination, are not easily repaired. Cells stop dividing only when the mutation gets worse.
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Which of the following situations could be represented by this graph?
Answer:
The answer is B
Explanation:
As you can see They do walk 1.5 Kilometers and stop at 20 then they walk until 3 kilometers in 40 minutes because they end at 60.
Most of the genetic disorders you have learned about are the result of a change in DNA sequence, as with cystic fibrosis, or the presence of
an extra chromosome, as with Down syndrome. The exception is Turner's syndrome. Women with Turner's syndrome have only 45 chromosomes. They are missing an X chromosome. This disorder is the only case in which a person can survive with one less chromosome.
What does this tell you about
how genetic information is inherited in humans?
Please help
The most genetic information is inherited in humans on the x-chromosome.
In bacteria, each messenger RNA (mRNA) serves as a template for the production of one or more particular proteins. Messenger RNAs (mRNAs) carry information from DNA. Translation is the process by which the primary amino acid sequence of a protein is established from the nucleotide sequence of an mRNA molecule.
Their mother passes one copy on to them through the egg, while their father passes the other one along sperm. Each egg and sperm have a single set of 23 chromosomes. Two copies of each chromosome and two copies of each gene are present when the sperm fertilizes the egg, resulting in the formation of an embryo.
Three separate processes responsible for the genetic diversity.
mutationrecombination,gene immigrationTo learn more about Genetics :
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I need help with this. URGENT!!
The nitrogen cycle is a repeating cycle of processes during which nitrogen moves through both living and non-living things: the atmosphere, soil, water, plants, animals and bacteria.
What are the characteristics of nitrogen cycle?The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial, and marine ecosystems.
There are five stages in the nitrogen cycle, and we will now discuss each of them in turn: fixation or volatilization, mineralization, nitrification, immobilization, and denitrification.
The nitrogen cycle matters because nitrogen is an essential nutrient for sustaining life on Earth. Nitrogen is a core component of amino acids, which are the building blocks of proteins, and of nucleic acids.
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19. How do some cells become brain cells and others become skin cells, when the DNA in ALL the calls is exactly the
same. In other words, the instructions are exactly the same, how does one cell become a brain call and anothera si
cell?
The proteins expressed and the genes activated makes one cell a brain cell and another skin cell.
Gene expression is the process through which a gene's information is used to create a functioning gene product, allowing it to produce end products like proteins or non-coding RNA and ultimately have an impact on phenotypes. However, in non-protein-coding genes like transfer RNA (tRNA) and small nuclear RNA (snRNA), the end result is a functional non-coding RNA instead of a protein.
Gene expression alterations lead to cell differentiation. This happens when various environmental signaling molecules activate or repress certain transcription factors that are required to express particular genes in the DNA. Inside of cells, DNA is arranged into chromosomes. Chromosomes have several genes.
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Did unicellular or multicellular life appear first ?
Answer:
unicellular life first
Explanation:
it arose billions of years ago while multicellular life forms around at least 600 million years ago
What is the function of the interdigital membranes in frogs? Do all frogs posses them? Explain.
Answer:
Function: To improve the animals´ movement and displacement on water.Not all frogs have well-developed membranes. Those with terrestrial habits exhibit reduced interdigital tissue.Explanation:
The interdigital membrane is the skin between the fingers and toes of the animals. This tissue is resistant and flexible. Its expansion varies among species and depends on their habits. The principal function of these membranes is to improve the animals´ movement and displacement on water. This tissue represents a broader area that provides resistance to water so the animal can swim faster and longer. On the ground, these membranes also can be useful while jumping, but this is not its principal function. The development of the interdigital membrane show variation among amphibians. In those taxa that spend most of their time in the water, the membranes are extensive and well-developed. On the contrary, groups that spend most of their lives on the ground, on trees, and other vegetation, exhibit poorly-developed membranes or almost absent.An enzyme called tyroinae produced the dark compound in kin (melanin). I’m albinim, thi enzyme doe not work or i not preent. Explain how each mutation could be reponible for Albinim
The majority of TYR mutations render tyrosinase inactive, preventing melanocytes from ever generating melanin. Type 1A oculocutaneous albinism is a result of several mutations (OCA1A).
The term "albinism" typically refers to oculocutaneous albinism, a group of genetic illnesses wherein the body produces little to no melanin. Your skin, hair, and eye colors are all influenced by the type and quantity of melanin in your body. Because melanin is involved in the growth and operation of the eyes as well, albinos have vision issues.
Albinism symptoms are typically visible in a person's skin, hair, and eye color, however sometimes there are minute variations. Due to their sensitivity to the sun's effects, people with albinism are more likely to get skin cancer.
Albinism has no known treatment, but those who have the condition can take precautions to protect their skin.
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HELP!!!!! How do musical embellishments help enhance a piece of music?
One of the few things that everyone can enjoy and relate to is music. We are all made of music.
What is Musical Embellishments?It is an essential component of who we are. Since the very beginning of human history, music has existed in all civilizations and all countries. Music, according to Henry Wadsworth Longfellow, is the human race's global language.
Amazingly, music can unite disparate groups of individuals. We can learn how to relate to others and develop our empathy through music. Peace can be attained through music. Fear, separation, and misunderstanding obstacles can be destroyed with just one person's understanding.
In Northern Europe at the end of December 1914, during World War I, music effectively facilitated peace.
Therefore, One of the few things that everyone can enjoy and relate to is music. We are all made of music.
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How does the cycling of carbon follow the Law of Conservation of Mass and Energy?
Answer:
The carbon cycle is an example of the Law because the same carbon atoms are being recycled through the carbon cycle.
Explanation:
The law states matter cannot be created or destroyed. So the carbon cycle backs that up since it is being reused.
Length of DNA and RNA
Answer:
. A DNA molecule in a human chromosome can be up to 250 million nucleotide-pairs long; in contrast, most RNAs are no more than a few thousand nucleotides long, and many are considerably shorter.
Which of the following is an example of positive feedback
A Body shivers to generate heat
B Blood vessels dilate to lower temperature
Blood clotting
D Regulation of blood sugar
Answer:
a the body shivers to generate heat
Question:
Which of the following is an example of positive feedback?
Answer: CORRECT (SELECTED)
A blood clot inducing more blood clotting.
Explanation:
Positive feedback loops amplify the starting signal. In this case, the clotting of blood stimulates more blood to clot.
Which adaptations allow thermophiles, a type of bacteria, to live within the hot springs of Yellowstone National Park
The ability to live in a highly acidic environment and the ability to withstand very hot temperatures are the adaptations that allow thermophiles, a type of bacteria, to live within the hot springs of Yellowstone National Park.
what is Adaptation?
Adaptation is the physical or behavioural characteristic of an organism that helps an organism to survive better in the surrounding environment.
The main feature of Yellowstone National Park is the presence of very hot and acidic water. Starting as rain on the surface, water from hot springs seeps through the bedrock beneath Yellowstone and is superheated by Yellowstone's magma system.
Thermophilic proteins have several adaptations that give them the ability to maintain structure and function at extreme temperatures. Thermophiles, for example, have specialized enzymes that use additional hydrogen bonds, salt bridges, and disulfide bonds to resist denaturation at very high temperatures, strengthening proteins to resist unfolding increase.
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acid rain contributes to all of the following problems except: A) smog B) loss of biodiversity C) damage to vegetation D) advance chemical weathering
Answer:
From what I've seen in my lessons the answer should be C. Just let me know if I'm wrong or not. Cheers!
Graph 5- Survivorship Curves Using your textbook or an online resource, determine the differences between K-selected species and r-selected species. Next, use the graph below to answer question 24.
The difference between K-selected species and R-Selected species is that the former posses a type I survivorship curve while the latter has type III survivorship curve.
A Type III survival curve is more likely to be present in K-selected species. Type I survivorship curves are typical in r-selected species. Graphs called survival curves provide a visual representation of the proportion of a population that is still alive at various ages. R-Selected species have evolved to survive in unstable and unpredictable surroundings. They produce a great number of tiny young.
The offspring of r-selected animals are comparatively self-sufficient at birth and do not get a lot of resources or parental care. Examples of r-selected species include plants like the dandelion and marine creatures like jellyfish.
Species chosen by K are adapted to predictable, steady surroundings. K-selected species tend to have populations that are roughly at their carrying capacity. These species have long generation times, and larger but fewer offspring overall. An example of a K-selected species would be an elephant or a human.
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According to Porter's model, which of the following should be considered when analyzing a firm's competition? (check all that apply)
buyers
the regulations in possible host countries
suppliers
the threat of substitutes
This model states that five forces determine the level of industry’s competition and profitability. The five forces are: (1) threat of new entrants, (2) bargaining power of buyers, (3) bargaining power of suppliers, (4) threat of substitutes, and (5) rivalry among existing firms.
Porter’s model of competition is a widely accepted framework for understanding the competitive landscape of an industry. When analyzing a firm’s competition, all of these forces should be considered. For example, understanding the threat of new entrants is important because it can impact the level of competition and pricing within the industry.
Similarly, the bargaining power of buyers and suppliers can be influential in setting industry prices and margins. Additionally, the threat of substitutes should be considered, as this can affect the demand for the firm’s product or service. Finally, the regulations in possible host countries should be taken into consideration, as these can also impact the firm’s ability to enter and operate in foreign markets.
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