Which of the following do all disease-causing viruses need in order to reproduce? a reverse transcriptase b the equipment of the host cell c amino acids d a signal from other viruses

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a.the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

If a robot fixed another robot is it a engineer or doctor?

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.