Answer:
new species often appear at about the same time.
Explanation:
A biotic crisis or a mass extinction crisis is a rapid and widespread decrease in biodiversity. There is a clear change after the mass extinction, in the diversity and of multicellular organisms.
Answer:
A is correct C is correct and D is also correct
Answer:
Skeletal muscles
Explanation:
Skeletal muscles contribute to maintaining temperature homeostasis in the body by generating heat. Muscle contraction requires energy and produces heat as a byproduct of metabolism.
RNA, 3, 4.
The very important thing here is the knowledge of the process of how a cell makes a protein, and this is quite simple. It starts at the nucleus of a cell, with the polymerase RNA reading the DNA and then making a single RNA ribbon, the mRNA, this contains 4 kinds of ribonucleotides, adenylate, guanylate, uridylate, cytidylate. This ribbon then gets out of the nucleus carried by tRNA containing the codon that matches these for, but in cracks (3).
Don't forget that this process is all based in amino acids, a protein is formed by these, and each crack will determine what this protein or that one will do for the cell's survival. So the conclusion to that is: all the proteins in your body are based in your own DNA, that's why you are who you are.
Answer: False
Explanation:
Most conifer trees keep their leaves year-round.
Hope it helps :) and let me know if you want me to elaborate.
