Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
1. | Penguin is homoiothermic while the remaining three are poikilothermic |
2. | Leech is a freshwater form while others are marine |
3. | Songilla has special collared cells called choanocytes, not found in the remaining three |
4. | All are bilaterally symmetrical |
1. Closed circulatory system
2. Segmentation
3. Pseudocoelom
4. Ventral nerve cord
Which one of the following is a matching pair of a body feature and the animal possessing it?
1. Post-anal-tail - Octopus
2. Ventral Central nervous system - Leech
3. Pharyngeal gills slits absent in embryo - Chamaeleon
4. Ventral heart - Scorpion
Which of the following pairs are correctly matched?
Animals | Morphological features | |
A. | Crocodile | 4-chambered heart |
B. | Sea urchin | Parapodia |
C. | Obelia | Metagenesis |
D. | Lemur | Thecodont |
1. A, C, and D
2, B, C, and D
3. Only A and D
4. Only A and B
What is true about Nereis, Scorpion, Cockroach, and Silverfish?
1. They all have jointed paired appendages
2. They all possess a dorsal heart
3. None of them is aquatic
4. They all belong to the same phylum
Metameric segmentation is characteristic of:
1. Platyhelminthes and Arthropoda
2. Echinodermata and Annelisa
3. Annelida and Arthropoda
4. Mollusca and Chordata