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lara [203]
3 years ago
12

Please help and explain.

Biology
1 answer:
horsena [70]3 years ago
4 0
I got you :)


The molecular clock (based on the molecular clock hypothesis (MCH)) is a technique in molecular evolution that uses fossil constraints and rates of molecular change to deduce the time in geologic history when two species or other taxa diverged. It is used to estimate the time of occurrence of events called speciation or radiation. The molecular data used for such calculations is usually nucleotide sequences for DNA or amino acid sequences for proteins. It is sometimes called a gene clock or evolutionary clock.
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In which of the following cases is an immune response not beneficial?
schepotkina [342]
Organ transplant answer3
8 0
3 years ago
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I need hel at science quick ASAP ​
andre [41]

Answers:

D) According to the graph, obesity and diabetes are intertwined, which could be why obesity and diabetes are linked.

E) Diabetes had the greatest rise in prevalence in 1997 until 2000, with prevalence percentages between about 76% to 78%.

Explanation: Explanation for these answers are below:

D) Looking at the graph, obesity and diabetes had similar prevalences in 1997 and 1998, and started to part ways a little in 1999.  In fact, even without the graph, scientists have known for a long time that people who have obesity also have diabetes.  This graph supports that claim because of how closely linked diabetes and obesity are and how similar the prevalence percentages are.

E) Diabetes had the greatest rise in 1997 to 2000, which had a 78% prevalence by 2000.  Obesity had very similar prevalence percentages from 75.5% to 77% in 1997 to 2000.

5 0
2 years ago
Higher viscosity of blood will increase the amount of stress placed on the heart while it is pumping. Viscosity of blood is high
Paul [167]

Answer:

C) hematocrit is highest

Explanation:

The viscosity is the property of the fluid substance related to the flow of the resistance. The flow of the resistance increases when the amount of content in the fluid increases.

The flowing blood contains the water and the other components like the cells and proteins therefore it also exhibit the viscosity. The viscosity in blood happens when the cells and molecules interact with each other therefore measure of these components indicated about the viscosity of the blood.

The hematocrit is the ratio of the proportion of the red blood cells present in the blood to the total volume of the blood. The viscosity of blood, therefore, increases when the hematocrit is high and decrease when the hematocrit component is low.

Thus, Option-C is the correct answer.

7 0
3 years ago
The study of the flow of energy and its transformations is called:.
Svetlanka [38]

The study of the flow of energy and its transformations is called thermodynamics.

Hope this helped!

6 0
2 years ago
The cycling of carbon between the living and non-living parts of the Earth system is an important result of which of the followi
Andrews [41]

Answer:

A: Plants and animals exchanging gases with the atmosphere

Explanation:

becaue they both give gas to atmospher

brainliest plz

8 0
3 years ago
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