Which sets of structures are homologous?
a. a whale's flipper and a bird's wing (my guess)
b. a beetle's leg and a horse's leg
c. a moth's eye and a cow's eye

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?