Q. No.Homeothermy is exhibited by:
(1) All amniotes
(2) Birds and Mammals
(3) All dueterostomes
(4) Reptiles and Mammals
Identify the option where all the columns are not correctly matched:
| Animal | Phylum | Features | |
| 1. | Pleurobrachia | Ctenophora | Comb plates, Only sexual reproduction |
| 2. | Loligo | Mollusca | Radula, Dioecious |
| 3. | Balanoglossus | Hemichordata | Respiration by gills, Proboscis gland |
| 4. | Ascidia | Chordata | Marine, Notochord persistent throughout life |
Birds are not characterized by:
1. Forelimbs modified into wings
2. Fully ossified endoskeleton
3. Skin dry without glands except for oil gland
4. Oviparous and external fertilization
Echinoderms are not characterized by:
1. An absence of excretory system
2. Bisexual animals
3. Usually external fertilization
4. Indirect development with free swimming larva
Identify the incorrectly matched pair:
| Animals | Feature present in both | |
| 1. | Balanoglossus and Pinctada | Open circulatory system |
| 2. | Branchiostoma and Ascidia | Persistent notochord |
| 3. | Aplysia and Pheretima | True coelom |
| 4. | Gorgonia and Pennatula | Cnidoblasts |
Pteropus is a/an:
| 1. | Limbless amphibian |
| 2. | Extinct reptile that evolved into mammals |
| 3. | Bony fish that migrates from sea water to fresh water for breeding |
| 4. | Mammal with flight |
Which of the following is not an arthropod characteristic?
1. Jointed appendages
2. Non-segmented bodies
3. Periodic moulting
4. Articulated exoskeleton
The structure shown in the given diagram is characteristically seen in the Phylum:
1. Porifera
2. Ctenophora
3. Cnidaria
4. Molluska
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