Asked by Tabitha Griffin on May 12, 2024
Verified
Cnidarians have an outer layer derived from ectoderm, an inner layer from endoderm, and a ____.
A) middle layer of mesoderm
B) watery middle layer
C) well-developed brain
D) jellylike matrix in between
E) complete gut
Mesoderm
The middle layer of an embryo in early development, which gives rise to muscles, bones, and the circulatory system among other structures.
Ectoderm
The outermost layer of cells or tissue of an embryo, giving rise to the outer skin layer, nervous system, and various sensory organs.
Endoderm
The innermost layer of cells or tissues of an embryo in early development, or the lining of the digestive and respiratory tracts in the mature organism.
- Understand the basic body structures of major animal phyla and their developmental patterns.
Verified Answer
FP
Fernando PinedaMay 18, 2024
Final Answer :
D
Explanation :
Cnidarians have a simple body structure that includes an outer layer derived from ectoderm and an inner layer from endoderm, with a jellylike matrix called mesoglea in between these layers, rather than a middle layer of mesoderm or any of the other options listed.
Learning Objectives
- Understand the basic body structures of major animal phyla and their developmental patterns.