Q. No.Which one of the following is not a mammalian character?
| 1. | Presence of milk producing glands |
| 2. | Skin is unique in possessing hair |
| 3. | Presence of external ears called pinnae |
| 4. | Homodont type of dentition |
Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.
| 1. Hydra | Coelenterata | Bilateral symmetry | Cnidoblasts present |
| 2. Planaria | Platyhelminthes | Bilateral symmetry | High regeneration capacity |
| 3. Ancylostoma | Annelida | Bilateral symmetry | Elongated and worm shape |
| 4. Octopus | Mollusca | Radial symmetry | External skeleton of shell present |
Gemmule formation is a common mode of asexual reproduction in
(1) Paramecium
(2) Hydra
(3) sponges
(4) yeast
Select the option that correctly matches characteristic features with the group of three animals.
| 1. | Skeleton of spicules | − Sycon, Adamsia, Spongilla |
| 2. | Excretion by flame | − Taenia, Fasciola, Ancylostoma |
| 3. | Mouth contains radula | − Dentalium, Octopus, Ophiura |
| 4. | Jointed appendages | − Limulus, Apis, Laccifer |
Select the incorrect statement.
(1) Periplaneta has compound eyes.
(2) Earthworm shows segmentation.
(3) Ascaris shows sexual dimorphism
(4) Liver fluke has a complete alimentary canal
Select the correct statement regarding reproduction.
| 1. | Mating in dogs is synchronised with lunar cycle. |
| 2. | Salamanders always have internal fertilisation. |
| 3. | In Trygon, the male introduces sperms into female through a modified pelvic fin. |
| 4. | Catla has internal fertilisation. |
Retrogressive metamorphosis occurs in
1. Hemichordata
2. Cephalochordata
3. Urochordata
4. Vertebrata
Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities?
(1) Carbon dioxide
(2) Water
(3) Uric acid
(4) Faeces
Select the animal that exhibits retrogressive metamorphosis.
(1) Bufo
(2) Amphioxus
(3) Limulus
(4) Herdmania
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