Yaa that statement is true, complex chemical catalyst of living cells are enzymes
D is the most likely answer because as the glacier moves across the landscape, it leaves many deep ridges into the earth. They eventually collect water and form deltas.
The answer is B. Genetic drift greatly affects small populations, but large populations can recover.
There is only species of a koala but you can ask how many races there are.
The name is, "phascolarctos cinereus".<span />