List-I | List-II | ||
(A) | Contractile vacuole | (I) | Asterias |
(B) | Water vascular system | (II) | Amoeba |
(C) | Canal system | (III) | Spongilla |
(D) | Flame cells | (IV) | Taenia |
Options: | (A) | (B) | (C) | (D) |
1. | (IV) | (II) | (I) | (III) |
2. | (I) | (III) | (II) | (IV) |
3. | (III) | (II) | (I) | (IV) |
4. | (II) | (I) | (III) | (IV) |
A: | Platyhelminthes are triploblastic, pseudocoelomate and bilaterally symmetrical organisms. |
B: | Ctenophores reproduce only sexually and fertilization is external. |
C: | In tapeworm, fertilization is internal but sexes are not separate. |
D: | Ctenophores are exclusively marine, diploblastic and bioluminescent organisms. |
E: | In sponges, fertilization is external and development is direct. |
1. | (A), (C) and (D) only | 2. | (B), (C) and (D) only |
3. | (A) and (E) only | 4. | (B) and (D) only |
Statement I: | All members of Animalia are multicellular. |
Statement II: | All members of Animalia have at least a tissue grade of organisation. |
I: | Four pairs of gills covered by an operculum on each side |
II: | Skin covered with placoid scales |
III: | Regulation of buoyancy by an air bladder |
I: | Annelids are metamerically segmented animals with a true coelom. |
II: | Arthropods are the most abundant group of animals characterised by the presence of jointed appendages. |
III: | Molluscs have a soft body surrounded by an external calcareous shell. |
IV: | Echinoderms possess a spiny skin. |
V: | Hemichordates are fresh water animals. |
I: | possess a jaw |
II: | have a cartilaginous endoskeleton |
Assertion (A): | The digestive system in Platyhelminthes is called incomplete. |
Reason (R): | Platyhelminthes are mostly endoparasites found in animals including human beings. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
4. | (A) is False but (R) is True. |
I: | an endodermally derived rod-like structure. |
II: | formed on the dorsal side during embryonic development in some animals. |