Q. No.Development takes place through a trochophore or veliger larva in:
1. Annelida
2. Mollusca
3. Arthropoda
4. Echinodermata
1. Annelida
In chordates, the tail is:
| 1. | Post anal and segmented |
| 2. | Post anal and unsegmented |
| 3. | Pre anal and segmented |
| 4. | Pre anal and unsegmented |
The most important reason for the fact that reptiles were the first animals to be successful on land is:
| 1. | Internal fertilization |
| 2. | Skin covered with scales |
| 3. | Partially divided ventricles |
| 4. | Presence of amnion |
Euplectella [Venus Flower Basket], shown in the figure below, belongs to:
| 1. | Porifera | 2. | Cnidaria |
| 3. | Ctenophora | 4. | Platyhelminthes |
Pinworm, Hookworm, and Filaria worm belong to:
| 1. | Annelida | 2. | Platyhelminthes |
| 3. | Aschelminthes | 4. | Arthropoda |
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Which of the following is not a character of deuterostomes?
1. Radial cleavage
2. Schizocoelous coelom
3. Indeterminate cleavage
4. Blastopore forms anus
Icthyophis is a/an:
| 1. Tunicate chordate | 2. Flightless bird |
| 3. Limbless amphibian | 4. Egg-laying mammal |
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Which of the following does not belong to Protostomia?
1. Annelids
2. Mollusks
3. Echinoderms
4. Arthropods
Approximately what percentage of existing animal species are invertebrates?
| 1. | 20% | 2. | 50% |
| 3. | 70% | 4. | 95% |
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