B migration, that is the answer
Answer:
Option C.
Scientist explain the incomplete fossil record because not all organisms become fossils. Processes like erosion and mountain building can change rock layers, causing fossils to be spread over multiple layers or destroyed.
Explanation:
- Fossils are the remains of organisms that are found on the rocks after they die.
- So, no one can be 100% sure about the complete fossil record because of the continuous process like erosion and other natural calamities.
- The sediment must cover any organism's remains to start the fossilization process to start. Most of the organisms start decomposing before this process can be executed.
Answer:
because the solute concentration is higher outside than inside, water exits through endoctocys
Explanation:
That is called uric acid and it helps them maintain internal homeostasis in hot climates by retaining water
thymine
adenine
cytosine
guanine
Explanation:
uracil is not because uracil is only RNA.
