[Campbell Biology P.723] Which of the following statements accurately describe the early emb... | Practice Question

Which of the following statements accurately describe the early embryonic development in most animals, as presented in the text and Figure 32.2?

  • A: Cleavage involves cell growth between mitotic divisions.
  • B: A blastula is typically a hollow ball of cells surrounding a cavity called the blastocoel.
  • C: Gastrulation produces layers of embryonic tissues, including the ectoderm and endoderm, from which adult body parts develop.
  • D: A larva is a sexually mature form that is morphologically identical to the adult.
  • E: The endoderm of the archenteron develops into the tissue lining the animal's digestive tract.

Explanation

Cleavage is a succession of mitotic cell divisions without cell growth. A blastula is a hollow ball of cells with a blastocoel. Gastrulation forms the primary embryonic tissue layers ectoderm and endoderm that give rise to adult structures. A larva is a sexually immature form, morphologically distinct from the adult. The endoderm of the archenteron forms the digestive tract lining.