1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lelechka [254]
3 years ago
9

What is the basis for the use of a molecular clock to determine the absolute time of evolutionary change?

Biology
1 answer:
dedylja [7]3 years ago
7 0

Nucleotide substitutions in a gene occur at a relatively constant rate.

A nonsynonymous substitution is a nucleotide mutation that alters the amino acid sequence of a protein. Nonsynonymous substitutions differ from synonymous substitutions, which do not alter amino acid sequences and are (sometimes) silent mutations.

You might be interested in
Will partial budgets ever contain some fixed ownership costs
madam [21]

<span>Yes, partial budgets MAY SOMETIMES contain some fixed ownership costs depending on whether the proposed change includes any change in capital assets owned (i.e. the purchase or sale of capital assets). If any change in capital assets is included in the proposed change, then fixed ownership cost will change, and this should reflect on the partial budget.</span>

5 0
3 years ago
According to the bar graph, how many players
ivanzaharov [21]

Answer: 1

Explanation: because that the bar graph that goes. higher then 30

8 0
3 years ago
1. Which event describes a change where evolution has happened?
serg [7]
First one is C, second one is B, third one is C
5 0
3 years ago
9. Which class of organic compounds is used by the body for cell repair and growth?
Vitek1552 [10]

Answer:

Proteins

Explanation:

Minerals are not organic compounds, and carbs and lipids do not repair/grow cells (lipids are primarily used to store energy and insulate/protect the body and carbs provide a short boost of energy).

4 0
2 years ago
Read 2 more answers
Animals lose heat through the surface areas of their skin. A small animal, such as a mouse, uses a much larger proportion of its
Goryan [66]

Answer:

Because of the difference in surface area to volume ratio

Explanation:

Surface are to volume ratio is the area of an object that is exposed to the external environment (surface area), compared to the amount within an object (volume).

Therefore an elephant has a lower surface area to volume ratio than a mouse.

The smaller an object is the greater its surface area to volume ratio.

Small animals have much more surface area per mass than large animals. With so much surface area, they lose heat very quickly. So, a mouse, with a lot of surface area per mass, must spend a lot more energy to stay warm than a large animal.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the term for an organism that makes its own source of chemical energy?
    10·1 answer
  • The raw materials used by plants to make food are _____.
    13·2 answers
  • Which of the following do gymnosperms and angiosperms have in common? Check all that apply. sporophyte generation gametophyte ge
    14·2 answers
  • What type of soil would you expect to find in cold, dry climates?
    11·1 answer
  • Explain how one of the earth’s natural processes is responsible for creating a natural resource.
    10·1 answer
  • Choose the best definition of homeostasis.
    5·1 answer
  • 18. Which activity is not a response of human white blood cells to pathogens?
    12·1 answer
  • Stuart is studying weather data for his region. The data was gathered from 1950 to 2016. Which observation would
    13·1 answer
  • Directions: You are to write a summary that explains why Lake Ontario won’t completely freeze over. Your summary should be writt
    5·1 answer
  • A volcanic eruption changes the environment and separates a population of foxes. These two new populations are no longer able to
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!