Question Detail

ZOO 102 Animal Diversity, Phylogeny, and Vertebrate Structure Objective Question

Question

In developmental biology, which characteristic is typically associated with deuterostomes during the eight-cell stage?
Options
A Spiral and determinate cleavage
B Radial and indeterminate cleavage
Correct Answer
C Schizocoelous coelom formation
D Mouth developing from the blastopore
Correct Answer

Option B is the correct answer.

Detailed Explanation

Deuterostomes exhibit radial and indeterminate cleavage, whereas protostomes exhibit spiral and determinate cleavage. Indeterminate cleavage allows cells to retain developmental flexibility.

Hint

Recall the patterns of cell division in the early embryo for this group.

Question Info