BIOLOGY HIGH SCHOOL

Which of the following describes natural selection? A. A population of mammals lives near the water, water levels rise and the habitat becomes swampy, the animals have trouble moving in the water, the population changes to a shorter-legged type so they can move more easily in the water B. A population of mammals lives near the water, water levels rise and the habitat becomes swampy, the act of swimming shortens the legs of the mammals, the offspring of the mammals have shorter legs C. Water levels rise and a habitat becomes swampy, a population on high ground observes the change, individuals with shorter legs migrate to the area D. A population of mammals varies in the length of their legs, water levels rise and the habitat becomes swampy, the individuals with shorter legs are better able to swim to food, the population evolves to become shorter-legged 1 points

Answers

Answer 1
Answer:

the answer is D. it shows how the population changed because the shorter legged animals survived and continued the population while the long legged animals died away.
Answer 2
Answer:

Final answer:

Natural selection occurs when there is variation within a species, inheritance of the variations, and a limit on resources. This leads to individuals with advantageous traits having a higher chance of survival and reproduction. The best example given was a population of mammals that evolved to have shorter legs due to a change in their habitat.

Explanation:

Natural selection is a crucial mechanism of evolution and it occurs when three conditions are present: variation within a species, inheritance of those variations, and a population limitation on resources consumed. This leads to a survival competition, where advantageous traits increase an individual's chances of survival and reproduction, thus passing these traits onto the offspring.

In the given options, the description that fits most closely with natural selection is: 'D. A population of mammals varies in the length of their legs, water levels rise and the habitat becomes swampy, the individuals with shorter legs are better able to swim to food, the population evolves to become shorter-legged'. This example demonstrates genetic variation (the different leg lengths), selection pressure (the change in habitat), and selection advantage (shorter legs being more suitable for the new conditions).

Learn more about Natural Selection here:

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Energy is released from ATP when

Answers

Answer: The correct answer for the blank is-

Energy is released from ATP ( adenosine triphosphate) when high energy phosphoanhydride bond ( present between two phosphate) is broken down or hydrolyzed.

This results in the formation of ADP ( adenosine diphosphate) and Pi ( inorganic phosphate).

Therefore, hydrolysis of ATP releases energy.

Energy is released from ATP when ATP undergoes hydrolysis.

ATP supplies energy for cellular activities by breaking off a phosphate group from its structure.

ATP is produced through the process of cellular respiration where food particles such as glucose are broken down to yield energy in the form of ATP.

Further Explanation

Cellular respiration

  • Cellular respiration is the process of by which living organisms use nutrients or food substances to generate energy in the form of ATP that is required to drive cellular processes.
  • Cellular respiration takes place in an organelle known as mitochondrion which is known as the powerhouse of the cell.
  • Cellular respiration takes place in three stages; glycolysis, Kreb's cycle and electron transport.  
  • Each step of cellular respiration yields ATP with the electron transport chain yielding the most number of ATP molecules, 34 ATP molecules.

ATP

  • ATP is the energy carrier molecule in the cells of living organisms. It is the usable form of energy by the cells in all living forms. Cells use ATP to drive all the cellular activities such as transport, excretion, growth and development, etc.
  • ATP is produced through the process of cellular respiration where food particles such as glucose are broken down to yield energy in the form of ATP.

Hydrolysis of ATP

  • ATP molecule is made up of a nucleotide base adenine attached to three phosphate groups.
  • Energy is contained in the bonds between the phosphates in an ATP molecule which is released when they are broken through the addition of water molecules a process called hydrolysis.
  • ATP powers cellular processes by transferring phosphates group in its structure to other molecules which releases energy required to drive the cellular activities.

Keywords: cellular respiration, ATP, energy  

Learn more about:  

Level: High school  

Subject: Biology  

Topic: Cellular respiration

Sub-topic: Hydrolysis ATP

This cell membrane gateway system is specifically called the

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Hey There!

The cell membrane gateway system is specifically called the Sodium Potassium Pump

Thank You!
The cell membrane gateway system you are looking for is called Sodium-Potassium-Pump.

I hope this helps!

Name for the collection of dna in the nucleus of eukaryotes cells

Answers

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A chromatin is a complex of nucleic acids (DNA or RNA) and proteins called histones which condense to form a chromosome  during cell division.

In eukaryotic cells, it is found within the cell nucleus while in prokaryotes, it is found inside the nucleoid .

 Its functions are;

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2. strengthen the DNA to allow mitosis and meiosis.

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What are the macromolecules DNA and RNA referred to as? Proteins Carbohydrates Nucleic acids

Answers

DNA and RNA macromolecules are referred to as Nucleic Acids.

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the endosymbiotic theory was supported by the scientist Lynn Margulis

Lynn Margulis

Hope this Helps

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Answers

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