Please help it’s urgent For these two questions

The part of a desired plant inserted into rootstock during grafting is called the

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.