Question

Answer in brief.
a. Give scientific classification of shark upto class.
b. Write four distinguishing characters of phylum- Echinodermata.
c. Distinguish between butterfly and bat with the help of four distinguishing properties.
d. To which phylum does Cockroach belong? Justify your answer with scientific reasons.

Answer 1

a. The classification of shark is as follows:
Kingdom- Animalia
Phylum- Chordata
Sub- phylum- Vertebrata
Class- Chondrichthyes

b. Characteristic features of Echinodermata are:

• they are called echinoderms because calcareous spines are present on the body of these animals.
• their skeleton is made up of calcareous spines/ossicles (plates).
• they show radial symmetry in adult stage whereas they show bilateral symmetry in larval stage.
• these animals have the ability of regeneration.
• they are found only in oceans.

c.

Butterfly	Bat
1. It belongs to the phylum Arthropoda.	It belongs to the phylum Chordata and class mammalia.
2. Their characteristic feature is the presence of joint appendages.	Their characteristic feature is the presence of mammary glands.
3. It shows the presence of chitinous exoskeleton.	Exoskeleton is in the form of hair or fur.
4. They are cold blooded organisms.	They are warm blooded organisms.

d. Cockroach belings to the phylum Arthropoda. It shows all the features which are a characteristic of this phylum:

• it shows the presence of jointed appendages
• it is triploblastic, coelomate, bilaterally symmetrical and segmented
• it has chitinous exoskeleton around its body
• it respires with the help of tracheal system