Identify prezygotic and postzygotic reproductive barriers

Question 1

What are prezygotic barriers?

Answer 1

Prezygotic barriers are reproductive barriers that occur before fertilization, preventing mating or fertilization between species.

Question 2

True or False: Temporal isolation is a type of prezygotic barrier.

Answer 2

True

Question 3

Fill in the blank: __________ isolation occurs when species breed at different times of the day or year.

Answer 3

Temporal

Question 4

What is an example of mechanical isolation?

Answer 4

Mechanical isolation occurs when the reproductive organs of different species are incompatible, preventing successful mating.

Question 5

Which of the following is NOT a prezygotic barrier? A) Habitat isolation B) Gametic isolation C) Hybrid sterility

Answer 5

C) Hybrid sterility

Question 6

What are postzygotic barriers?

Answer 6

Postzygotic barriers are reproductive barriers that occur after fertilization, affecting the viability or reproductive capacity of hybrid offspring.

Question 7

True or False: Hybrid inviability is a type of postzygotic barrier.

Answer 7

True

Question 8

Fill in the blank: __________ sterility occurs when hybrid offspring are unable to reproduce.

Answer 8

Hybrid

Question 9

What is the main difference between prezygotic and postzygotic barriers?

Answer 9

The main difference is that prezygotic barriers prevent mating or fertilization, while postzygotic barriers affect the viability or fertility of hybrid offspring after fertilization.

Question 10

Name one type of gametic isolation.

Answer 10

Gametic isolation occurs when the sperm of one species cannot fertilize the eggs of another species, often due to incompatible proteins.