Q. No.Water transport system or canal system is a characteristic feature of which animal?
1. Spongilla
2. Hydra
3. Asterias
4. Echinus
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 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 is common among mammals?
| 1. | They do not moult |
| 2. | They have seven cervical vertebrae |
| 3. | They are carnivores |
| 4. | They have ventral nerve cord |
Identify the incorrect match from those given below
|
(1) |
Jelly fish |
Aurelia |
Scyphozoa |
|
(2) |
Paddle worm |
Chaetopterus |
Polychaeta |
|
(3) |
Cray fish |
Oniscus |
Crustacea |
|
(4) |
Acorn worm |
Balanoglossus |
Enteropneusta |
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