Answer:
The toxic sludge covers the animals completely, and then they suffercate and dye, I don't know how else to say that
What it does is lowering the germination rate by more than a half(That's all, I'm sorry I couldn't provide more :(
Answer:
both of the models have enzymes that bind and the binding is covalent
Explanation:
The two cells that result from a single cell need to have the same amount of genetic material as the initial cell, therefore the DNA needs to be duplicated before the cell divides.
The sister chromatids are attached together so that during anaphase the daugther cells will receive the same chromosomes