True or false: The primary factor in determining the cleavage pattern of an animal embryo is the amount of yolk present in the egg.True false question.TrueFalse

True or false: Patterns of cleavage of animal eggs is the same among all animal phyla.True false question.TrueFalse

Which of the following describes the patterns of cleavage of an animal egg?Multiple choice question.They vary in invertebrates but are identical in all vertebrates.They vary among animal phyla.They are the same in all animal phyla.

During which stage of development is the egg fertilized by the sperm and the zygote undergoes cleavage?Multiple choice question.Embryonic periodFetal periodPre-embryonic period

Which are true statements regarding cleavage and the blastula?Check All That ApplyCleavage is the division of a zygote into smaller and smaller cells.Cleavage is the division of a zygote into smaller and smaller cells.The blastula is a solid ball of cells.The blastula is a solid ball of cells.Cleavage generally occurs slowly.Cleavage generally occurs slowly.Cleavage patterns are identical among different animal species.Cleavage patterns are identical among different animal species.The presence of yolk may impede cleavage.

Holoblastic cleavage occurs in eggs containing which of the following?Multiple choice question.Yolk-richModerate to little yolkNo yolk