Multiple Choice
What does evolutionary fitness measure?
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
Which of the following clades does not exhibit radial cleavage during embryonic development?
A
Protostomes
B
Echinoderms
C
Chordates
D
Deuterostomes
Verified step by step guidance1
Understand the concept of radial cleavage: Radial cleavage is a type of embryonic development where the cells divide symmetrically around a central axis. This is typical in deuterostomes.
Identify the clades listed in the problem: Protostomes, Echinoderms, Chordates, and Deuterostomes.
Recall the characteristics of deuterostomes: Deuterostomes, which include echinoderms and chordates, typically exhibit radial cleavage during embryonic development.
Understand the characteristics of protostomes: Protostomes generally exhibit spiral cleavage, which is different from radial cleavage.
Determine which clade does not exhibit radial cleavage: Based on the characteristics, protostomes do not exhibit radial cleavage, unlike the other clades listed.
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