In the beginning, the environment was free of air pollution and the light colored moths were more prevalent in the forest against the light colored trees. however, as air pollution started to increase, black colored moths were more prevalent in the forest.

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

Individuals do not compete directly for resources, but are prey for the same predator