What are the main characteristics of phylum Ctenophora?

What are the main characteristics of phylum Ctenophora?

Some of the common features and important characteristics of the phylum Ctenophora are following:

• They are free-living marine organisms.
• They are diploblastic, i.e. possess two embryonic layers, ectoderm and endoderm.
• They are acoelomates, i.e. do not have a body cavity.
• Ctenophores are radially symmetrical.

What are the advanced features of phylum Ctenophora over the phylum Cnidaria?

Since they are symmetric from a central point, cnidarians are radially symmetric animals, while ctenophores are biradially symmetric. This means that they have a combination of both radial and bilateral symmetry.

What are the characteristics of Ctenophora that are different than Cnidaria?

The cnidarians can be either sessile or mobile. But, ctenophores are always mobile. The main difference between Cnidaria and Ctenophora is that Cnidaria exhibits radial symmetry whereas Ctenophora exhibits biradial symmetry. Both cnidarians and ctenophores possess sense organs such as statocytes and ocelli.

What are the general characteristics of phylum Cnidaria?

The five main characteristics of cnidarians are:

• Radial symmetry.
• Diploblastic animals.
• Tissue level of organisation.
• Presence of cnidoblasts with stinging nematocysts on the tentacles.
• Polymorphism and have two body forms, i.e. polyp and medusa.

What are 5 characteristics of phylum platyhelminthes?

Characteristic features of Phylum Platyhelminthes

• Their body is dorsoventrally flattened.
• They exhibit bilateral symmetry.
• Also, they are triploblastic, with three germ layers.
• They do not have a body cavity and are acoelomate.
• The body is soft and unsegmented.
• They are mostly parasitic with a few free-living.

What is a unique feature of the phylum Ctenophora quizlet?

Comb jellies, similar to jellyfish but they have a simpler life cycle and they lack nematocysts, so they capture prey with sticky cells on two long tentacles, moves around when combs of cilia beat in sequence.

What characteristics of Ctenophora are most important in distinguishing it from other phyla?

What characteristics of Ctenophora do you think are most important in distinguishing it from other phyla? Radial symmetry; making adhesive cells called colloblasts, do not make nematocysts; found at considerable depths; use sinous body movements, as well as their comb plate, in locomotion; transparent bodies. 19.

What is difference between Coelenterata and Ctenophora?

Coelenterata has two subphyla namely cnidaria and Ctenophora. They are aquatic organisms. Cnidaria is a highly diverse group, which is a distinguishing feature called cnidocytes. Ctenophora is a less diverse group, which has comb plates.

Why are ctenophores called comb jellies?

Ctenophores are called as ‘comb jellies’. It is a gelatinous animal that drifts through the ocean’s water column around the world. Comb jellies are named for their unique features like, plates of giant fused cilia, known as combs, which run in eight rows up and down their bodies.

What is major characteristic of the phylum Aschelminthes?

Key features of Phylum Aschelminthes The body is bilaterally symmetrical and triploblastic. The body is unsegmented, long, slender and tapers at the end. Metameric segmentation is not found. They are dioecious, males are generally smaller than females.

What are the general characteristics of the phylum Annelida?

Characteristics of Phylum Annelida They have a long and segmented body. Annelids are bilaterally symmetrical. They are triploblastic. Also, they exhibit organ system grade of organisation, showing organ differentiation.

Which of the following are characteristics of cnidarians?

Which of the following describes what is currently known about Ctenophora symmetry?

Which of the following describes what is currently known about Ctenophore symmetry? Ctenophores are possibly triploblasts because of muscle cells derived from mesoderm.

Are ctenophores diploblastic or triploblastic?

C) Ctenophora-Some species of Ctenophora are triploblastic whereas some are diploblastic. Example- comb jelly. Additional information:The diploblastic organisms are radially symmetrical whereas the triploblastic are bilaterally symmetrical.

Which system is absent in ctenophores?

So, the correct answer is ‘Cnidoblasts’.