Asked by Tyler Short on Jul 17, 2024
Verified
Protostomes are distinguised from deuterostomes based on
A) the presence or absence of a nervous system.
B) the pattern of embryonic development.
C) the presence or absence of a circulatory system.
D) the presence of absence of cephalization.
E) feeding behaviors.
Protostomes
A group of animals characterized by the blastopore (the first opening in the developing embryo) becoming the mouth, including groups like mollusks and annelids.
Deuterostomes
A group in the animal kingdom characterized by the development of the anus from the first opening in the embryo, with the mouth developing later.
Embryonic Development
The process through which an embryo forms and develops from fertilization to birth.
- Acquire an understanding of the variances between protostomes and deuterostomes, with a focus on their developmental processes.
Verified Answer
PH
Pauwy HilwaJul 21, 2024
Final Answer :
B
Explanation :
The pattern of embryonic development is the main distinguishing feature between protostomes and deuterostomes. Protostomes undergo spiral and determinate cleavage, while deuterostomes undergo radial and indeterminate cleavage. This results in different body plans and organ systems developing between the two groups.
Learning Objectives
- Acquire an understanding of the variances between protostomes and deuterostomes, with a focus on their developmental processes.