| (I) (a) Cellular level of body organisation is present. - Go to IV |
| (b) Tissue/Organ level of body organisation is present. - Go to II |
| (II) (a) Radial symmetry is present. - Go to III (a) |
| (b) Bilateral symmetry is present. - Go to III (b) |
| (III) (a) It is acoelomate. - Go to V |
| (b) It is true coelomate. - Go to VI |
| (IV) (a) It is found in deep sea waters and is a costly wedding gift in Japan. – [P] |
| (b) It is commonly known as bath sponge. [Q] |
| (V) (a) It is commonly known as the sea anemone. – [R] |
| (b) It is commonly known as sea fur. – [S] |
| (VI) (a) It is segmented and sanguivorous. – [T] |
| (b) It bears jointed feet and chitinous exoskeleton. – [U] |
A) The body of organism P is perforated by numerous pores called ostia whereas R possesses special stinging cells called cnidoblasts.
B) The excretory system of Q consists of characteristic flame cells or protonephridia.
C) The body wall of S consists of special stinging cells called choanocytes whereas body of T is differentiated into head, visceral mass and foot.
D) Body of U bears paired locomotory appendages called parapodia.
Correct Answer: A
Solution :
Flame cells or protonephridia are the excretory organs found in flatworms, e.g., tapeworm. Body of Spongia consists of special stinging cells called choanocytes whereas body of Hirudinaria is metamerically segmented. Parapodia are unjointed appendages whereas Periplaneta have jointed appendages.
You need to login to perform this action.
You will be redirected in
3 sec
