Asked Apr 3, 2019

Why are Cnidarians diploblast and other animals tripoblast based on evolution?


Expert Answer

Step 1

In the early developmental stages, the embryo of the vertebrates organizes itself into a three-layered structure. In these layers, each layer gives rise to a different set of tissues. Such organisms are termed as triploblastic in nature. These layers are also termed as germ layers and divided into endoderm, mesoderm, and ectoderm.

The organisms which are diploblastic in nature, they have two germ layers. The examples of such organisms are hydra and jellyfish. In the adult stage, they contain an outer layer of cells (skin), and an inner layer (gut).

Step 2

Corals, jellyfish, hydra, and sea anemones belong to the phylum Cnidarians. Cnidarians are diploblastic in nature, that is, they have two germ layers. In other animals, there are three germ layers; hence they are termed as triploblastic in nature. Cnidarians are used as a model to study the evolution in animals, and the involvement of the third germ layer in them.

Cnidarians have a complex life cycle. First of all, the eggs develop into two-layered planula larva and then develop into a sessile polyp stage, and ...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Evolution and Adaptation

Related Biology Q&A

Find answers to questions asked by student like you

Show more Q&A add

Q: What is microbiology and how is it used in nursing?

A: Microbiology is an advanced discipline of biological sciences which involves the study of microbes. ...


Q: What is environmental microbiology?:  Describe

A: Environmental microbiology is one of the most significant branches of microbiology. It refers to the...


Q: In the body, vitamin E 1.   is incorporated into chylomicrons. 2. functions as a fat...

A: Vitamins are the organic compounds that an individual requires in small amounts for the growth and d...


Q: How does Gamma radiation control the microbial growth affect of cells?

A: Different forms of radiations are used to kill microorganisms or control their growth. Gamma rays fa...


Q: clomate change due to th erapidly increasing levels of greenhouse gases (particularly CO2) in our at...

A: Carbon dioxide is a greenhouse gas. Increase in greenhouse gases in the atmosphere is one of the rea...


Q: 2a. What is the adaptive advantage of functional compartmentalization in multicellular eukaryotes?

A: Eukaryotes are majorly multicellular animals and their cells exhibit division of labor. Eukaryotic c...


Q: Describe the path of a mature egg that is released and fertilized.

A: An egg is a female gamete and is released by the ovaries. At its release, it is at secondary oocyte ...


Q: what does it mean to denature a protein?

A: The proteins are one of the essential part of the living organism that used as various function in t...


Q: Capillary ExchangeBlood flowing through a capillary bed experiences the following pressures:- Blood ...

A: The force exerted by a fluid on a structure is called as hydrostatic pressure. Blood hydrostatic pre...