Asked by Hunter Waddington on Jul 17, 2024
Verified
Which of the following is characteristic to most protostomes?
A) The blastophore typically develops into the anus.
B) There is no blastophore.
C) The developmental fate of the embryonic cells tends to occur via indeterminate cleavage.
D) Cell division tends to be via spiral cleavage.
E) The blastophore typically develops into the brain.
Protostomes
A major group of animals in which the mouth develops from the first opening in the embryo, with examples including mollusks, annelids, and arthropods.
Spiral Cleavage
A type of embryonic development in some molluscs and annelids where cells divide in a spiral pattern.
- Identify the genetic commonalities across bilaterally symmetrical animals and the importance of particular gene families in their evolutionary process.
Verified Answer
NA
Naomi AmareJul 18, 2024
Final Answer :
D
Explanation :
Protostomes typically exhibit spiral cleavage during embryonic development, where cells divide in a spiral pattern. This is a distinguishing characteristic of many protostomes, contrasting with the radial cleavage seen in deuterostomes.
Learning Objectives
- Identify the genetic commonalities across bilaterally symmetrical animals and the importance of particular gene families in their evolutionary process.