Answer is B) 1, 3, 2
Fish with craniums naturally preceded the evolution of sharks, since sharks have craniums. Sharks must have evolved from a cranium-wielding ancestor.
Sharks evolved about 450 million years ago, before land vertebrates (animals with spines and skeletal systems) even existed. Mammals evolved about 100 million years later.
The heart receives more oxygen which helps it to pump the blood faster around the body to reach your muscles causing more blood to come to the surface. This is what i think so it may not be completely right.
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A five-cycle PCR process is started with a single DNA duplex. How many copies of your sequence, in theory, do you have right now? 32.
<h3>What is the PCR?</h3>
1) PCR, or polymerase chain reaction, is a method for producing several copies of a particular DNA region in vitro (in a test tube rather than an organism).
2) Taq polymerase, a thermostable DNA polymerase, is used in PCR, and DNA primers made especially for the desired DNA region are necessary.
3) PCR allows for the production of several copies of the target region by cycling the reaction repeatedly through a series of temperature changes.
4) PCR has a wide range of useful research applications. It is frequently employed in forensic analysis, medical diagnostics, and DNA cloning.
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Answer:
A
Explanation:
had a quiz on this like 2 years ago...
I believe the answer is respiration