Natural selection is least likely to be the cause of a change in a population's allele frequencies when: a. there is no competition for resources. b. the population has no genetic variation. c. there is ample genetic variation in the population. d. the ecosystem experiences extreme disturbances.

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.

What processes take place before the mature mrna exits the nucleus?