I: | has dorso-ventrally flattened body |
II: | is an endoparasite in human beings |
III: | has hooks and suckers present at its anterior end |
1. | Platyhelminthes | 2. | Annelida |
3. | Aschelminthes | 4. | Cnidaria |
Statement I: | Alimentary canal is complete with a well-developed muscular pharynx. |
Statement II: | An excretory tube removes body wastes from the body cavity through the excretory pore. |
Statement III: | They are dioecious and males are longer than females. |
1. | Only Statement II |
2. | Only Statement III |
3. | Only Statement I and Statement II |
4. | Only Statement II and Statement III |
1. | Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. |
2. | Nereis is dioecious. |
3. | Earthworm is monoecious. |
4. | Hirudinaria, blood-sucking leech, is an annelid that lacks true coelom and metamerism. |
I: | They are bilaterally symmetrical, triploblastic, non-segmented and pseudocoelomate animals. |
II: | Arthropoda is the largest phylum of Animalia and includes more than 90 % of all species on the earth that are named so far. |
III: | Insects are arthropods with body consisting of head, thorax and abdomen. |
1. | Only I | 2. | Only I and II |
3. | Only III | 4. | Only II and III |
Column I | Column II | ||
A. | Insect reared for producing silk | P. | Locusta |
B. | Mosquito acting as vector for Dengue virus | Q. | Bombyx |
C. | Gregarious pest | R. | Limulus |
D. | Living fossil | S. | Aedes |
A | B | C | D | |
1. | Q | S | P | R |
2. | Q | S | R | P |
3. | P | Q | R | S |
4. | R | P | Q | S |
1. | It is the second largest animal Phylum after Phylum Arthropoda. |
2. | It includes animals that are bilaterally symmetrical, triploblastic, and coelomate. |
3. | Body is covered with a calcareous shell and is metamerically segmented with a distinct head, muscular foot, and visceral hump. |
4. | Gills are present in the mantle cavity, a space between the mantle and the hump. |
1. | Pinctada | Pearl Oyster |
2. | Aplysia | Sea hare |
3. | Dentalium | Tusk shell |
4. | Loligo | Devil fish |
1. | They have bilateral symmetry as adults and radial symmetry as larvae. |
2. | They are triploblastic and coelomates. |
3. | They possess a well-developed excretory system. |
4. | They have an incomplete digestive system. |
1. | Circulatory system is a closed type |
2. | Proboscis gland is a digestive gland that secretes a large number of hydrolytic enzymes |
3. | Respiration takes place through the gills |
4. | Sexes are not separate, fertilization is internal and development is direct |
a. | A notochord |
b. | Ventral, solid, and double central nervous system |
c. | Pharynx perforated by gill slits |
d. | Ventral heart |
e. | Terminal anus and a lack of post-anal tail |
1. | a, c, and d only | 2. | a, b. and e only |
3. | a and c only | 4. | b, c, and d only |