What evidence for the endosymbiotic hypothesis

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

The activity of the modern sample is 1.10 bq . how long does that measurement take?

What do all of the above organisms have in common