Cyclins are a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes.
So A. Is correct
Answer:
the difference is that its bigger
Explanation:
its bigger because birds are much smaller than mammals and they dont have as big as bones like mammals
Answer:
The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
Speciation is the evolution of one species into two different kinds, and when they become isolated, that is the final step, since they cannot interbreed any longer.
Answer:
I believe its the first one
Explanation:
I've done an experiment on this and water dissolves in salt.
An estuary is not a terrestrial biome