The animals with bilateral symmetry in the young stage and radial pentamerous symmetry in the adult stage, belong to the phylum:
1. | Mollusca | 2. | Cnidaria |
3. | Echinodermata | 4. | Annelida |
In Arthropoda, the head and thorax are often fused to form a cephalothorax, but in which one of the following classes, is the body divided into head, thorax, and abdomen?
1. Myriapoda
2. Crustacea
3. Arachnida and Crustacea
4. Insecta
One of the following is a very unique feature of the mammalian body:
1. Presence of diaphragm
2. Four-chambered heart
3. Rib cage
4. Homeothermy
What is true for Mammalia:
1. Platypus is oviparous
2. Bats have feather
3. Elephant is ovoviviparous
4. Diaphragm is absent in them
Which of the following character is not found in all the chordates:
1. Diaphragm
2. Coelom
3. Pharyngeal gill clifts
4. Dorsal nerve cord
Which gland secretes odourous secretion in mammals:
1. Bartholins
2. Prostate
3. Anal gland
4. Liver-bile
The similarity between Ascaris lumbricoides and Anopheles stephensi is:
1. Sexual dimorphism
2. Metamerism
3. Anaerobic respiration
4. Endoparasitism
In which of the following, the notochord is present in the embryonic stage?
1. | All chordates | 2. | Some chordates |
3. | Vertebrates | 4. | Non-chordates |
In which animal nerve cell is present but the brain is absent:
1. Sponge
2. Earthworm
3. Cockroach
4. Hydra
Which of the following animals have scattered cells with cell–tissue grade organization:
1. Sponge
2. Hydra
3. Liver fluke
4. Ascaris