How many of the following invertebrates exchange O2 with CO2 by simple diffusion
(Sponges, Coelenterates, flatworms, Annelida, Arthropoda, Mollusca, Pisces,)
(A)6
(B)5
(C)4
(D)3
How many of the following invertebrates exchange O2 with CO2 by simple diffusion
(Sponges, Coelenterates, flatworms, Annelida, Arthropoda, Mollusca, Pisces,)
(A)6
(B)5
(C)4
(D)3
Identify the incorrectly matched class of vertebrates with the features given :
| 1. | Fishes - Jaws and paired appendages (except Agnathans); Single loop circulation; Gills |
| 2. | Amphibians - Legs ( except in Caecilian); three chambered heart; no pulmonary veins |
| 3. | Reptiles - Amniotic egg; dry skin, thoracic breathing |
| 4. | Birds - Feathers; flight skeleton; endothermy |
Which one of the following is a matching set of a phylum and its three examples?
(1) Cnidaria − Bonellia, Physalia, Aurelia
(2) Platyhelminthes − Planaria, Schistosoma, Enterobius
(3) Mollusca − Loligo, Teredo, Octopus
(4) Porifera − Spongilla, Euplectella, pennatula
Which one of the following is a matching set of a phylum and its three examples?
(1) Cnidaria − Bonellia, Physalia, Aurelia
(2) Platyhelminthes − Planaria, Schistosoma, Enterobius
(3) Mollusca − Loligo, Teredo, Octopus
(4) Porifera − Spongilla, Euplectella, pennatula
| 1. | Earthworm | 2. | Tunicate |
| 3. | Moth | 4. | Starfish |
2. Reptilia
3. Aves
4. Osteichthyes
1. Macropus
2. Chelone
3. Camelus
4. Psittacula
| Assertion : | Claspers of cartilage fishes are analogous to penis of human male. |
| Reason : | Both act as copulatory organs and transfer the sperms into female. |
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