Question

Write two distinguishing characters of following phyla

a. Arthropoda b. Echinodermata c. Chordata​

Answer 1

Answer:

Arthropoda

and Chordata.

Let's, you given a answer.

Answer 2

Answer:

a. Arthropoda :-

1. The body structure shows bilateral symmetry.

2. They are triploblastic.

3. They can be found in all types of habitats – land, water and soil.

4. They have jointed limbs.

5. The body is segmented into three regions – Head, Thorax and Abdomen.

b. Echinodermata

1. These are exclusively marine animals.

2. The larval forms show bilateral symmetry and adult forms show radial symmetry.

3. They are triploblastic.

4. It exhibits organ system grade of organisation.

5. They have a true coelom.

c. Chordata

1. They are bilaterally symmetrical and triploblastic.

2. Chordates are coelomate and show an organ system level of organisation.

3. They have the characteristic notochord, dorsal nerve cord, pharyngeal slits.

4. Also, they have a post-anal

5. In this phylum, the nervous system is dorsal, hollow and single.