How many times in the history of earth has the number of species dropped drastically? a. four times b. three times c. five times d. six times

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

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.

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content