What defines organisms as belonging to the same species?

• They can interbreed and produce fertile offspring.

• They look exactly alike.

• They live in the same geographic area.

• They have similar diets.

What is a common characteristic of offspring resulting from the breeding of two different species, like a zonkey?

• They are usually stronger than their parents.

• They are typically sterile and cannot reproduce.

• They always have a unique appearance.

• They can only survive in captivity.

What is the primary factor that leads to allopatric speciation?

• Differences in mating rituals.

• Variations in breeding seasons.

• A geographic barrier separating populations.

• Inability of offspring to survive.

Which type of prezygotic barrier is demonstrated by two bird species that look very similar but do not mate because their songs are different?

• Temporal isolation.

• Habitat isolation.

• Behavioral isolation.

• Genetic incompatibility.