Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Coelenterates (cnidarians)
2. Ascheminthes (roundworms)
3. Ctenophores
4. Sponges
Which one of the following pair of animals comprises 'jawless fishes'?
1. Lampreys and eels
2. Mackerals and rohu
3. Lampreys and hagfishes
4. Guppies and hagfishes
1. | Scales on their hind limbs |
2. | Four-chambered heart |
3. | Two special chambers crop and gizzard in their digestive tract |
4. | Eggs with a calcareous shell |
1. Closed circulatory system
2. Segmentation
3. Pseudocoelom
4. Ventral nerve cord
1. | Arthropoda - The body is divided into a head, thorax, abdomen and respiration by mouth |
2. | Chordata - Notochord at some stage and separate anal and urinary openings to the outside |
3. | Echinodermata – Pentamerous radial symmetry and mostly internal fertilization |
4. | Mollusca - Normally oviparous and developed through a trochophore or veliger larva |
Which one of the following pairs is mismatched?
1. | Pila globosa - pearl oyster | 2. | Apis indica- honey bee |
3. | Laccifer lacca- lac insect | 4. | Bombyx mori- silkworm |
What is common between parrot, platypus, and kangaroo?
1. Homeothermy
2. Toothless jaws
3. Functional post-anal tail
4. Oviparity
1. | absence of true coelom but the presence of metamerism |
2. | presence of neither true coelom nor metamerism |
3. | presence of true coelom but the absence of metamerism |
4. | presence of true coelom and metamerism (metamerisation) |
Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
Animals |
Morphological feature |
(a) Liver fluke, sea anemone, sea cucumber |
Bilateral symmetry |
(b) Centipede, prawn, sea urchin |
Jointed appendages |
(c) Scorpion spider, cockroach |
Ventral solid central nervous system |
(d) cockroach locust, Taenia |
Metameric segmentation |
1. a
2. b
3. c
4. d
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