1. | Gastrovascular cavity has a single opening, mouth on hypostome. |
2. | Corals are cnidarians and have a skeleton of calcium carbonate. |
3. | They exhibit tissue level of organization and are diploblastic. |
4. | Digestion is exclusively intracellular. |
I: | Polyp is sessile and cylindrical form as seen in Hydra and Adamsia. |
II: | Medusa is umbrella-shaped and free swimming form as seen in Aurelia. |
1. | Only I is correct | 2. | Only II is correct |
3. | Both I and II are correct | 4. | Both I and II are incorrect |
a: | both polyp and medusa forms exist during its life cycle |
b: | metagenesis, a sort of alternation of generation, is seen |
c: | polyps produce medusae sexually and medusae form the polyps sexually |
1. | only a is correct | 2. | only a and b are correct |
3. | only c is correct | 4. | a, b and c are correct |
Column I | Column II | ||
A. | Physalia | P. | Sea-fan |
B. | Adamsia | Q. | Sea anemone |
C. | Pennatula | R. | Sea-pen |
D. | Gorgonia | S. | Portuguese men of war |
A | B | C | D | |
1. | S | Q | R | P |
2. | S | R | Q | P |
3. | P | Q | R | S |
4. | S | P | Q | R |
Statement I: | Planaria is a free-living flatworm and possesses high regeneration capacity. |
Statement II: | Hooks and suckers are present in parasitic flatworms. |
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 |