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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.

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Which of the following reactions is incorrectly paired with its location?
galben [10]

E)Krebs cycle/ cristae of mitochondria

Krebs cycle occurs inside the matrix of the mitochondria. Electron transport chain takes place in the cristae.

8 0
3 years ago
Which best explains how the body mantens homeostats)
jek_recluse [69]

Answer:

All systems work together to stabilize the body.

Explanation:

Certain systems work with each other in order to maintain homeostasis, which is essential for the body. For example, when blood circulates through the digestive system, it picks up nutrients absorbed by the body during its last meal. Additionally, blood carries oxygen taken in by the lungs. The circulatory system works with the respiratory system here to distribute oxygen to other parts of the body.

6 0
3 years ago
Which renewable resource is the most widely used resource in the world?
andreev551 [17]

Answer:

Hydro is the most renewable power resource with global hydroelectric installed capacity exceeding 1,295GW accounting 18% of the world's total installed power generation capacity and more than 54% global power generation capacity

3 0
3 years ago
What can you conclude is one disadvantage of the arrangement of glucose molecules that gives chitin and cellulose their strength
Lynna [10]
The correct answer is the option B) It does not allow for the accumulation of glycogen and, therefore, limits the organism's mobility.
Explanation:
In cellulose and chitin the arrangement of glycogen in in alternate arrangement that provides the support to the plants that makes it strong and the limits its mobility.
If plants lac their special arrangement of the glycogen in chitin and cellulose the water will flow in and it will not be stand upright.
Thus, the correct answer is option B) It does not allow for the accumulation of glycogen and, therefore, limits the organism's mobility.


5 0
1 year ago
How do the circulatory system and immune system work together to
ozzi

Answer:

Increased blood flow kills healthy cells which prevents infection at the site of the injury.

Increased blood flow carries white blood cells to the site of the injury.

Explanation:

:)

7 0
2 years ago
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