Q. No.Which of the following is not a feature of birds?
1. Forelimbs modified into wings
2. Single occipital condyle
3. Ten pairs of cranial nerves
4. Four-chambered heart
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Radially symmetrical animals:
1. Are all triploblastic
2. Tend to be sessile and passively floating
3. Have a definite head and a brain
4. Have an anterior and a posterior end
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An important evolutionary transition that appeared for the first time in Echinoderms is:
| 1. | Bilateral symmetry | 2. | Radial symmetry |
| 3. | Tube within a tube plan | 4. | Endoskeleton |
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Perhaps the biggest reason for the enormous success of Arthropods is?
1. Chitinous exoskeleton
2. Diverse appendages
3. Respiration by tracheoles
4. Internal fertilization
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
A sort of alternation and generation seen in Cnidarians is termed as:
1. Metamorphosis
2. Epiboly
3. Metagenesis
4. Anagenesis
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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 |
Approximately what percentage of existing animal species are invertebrates?
| 1. | 20 | 2. | 50 |
| 3. | 70 | 4. | 95 |
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