Biology
Define the terms:
(a) Species
(b) Clitellum
(c) Moulting
(d) Diaphragm
(e) Nocturnal animals
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Answer
(a) Species — Species means an organism of particular kind whose members can interbreed among themselves to produce fertile young ones.
(b) Clitellum — The clitellum is a specialized reproductive structure found in certain annelids, particularly in earthworms. It is a short cylindrical band of thick glandular skin that surrounds the body like a belt and is around one-third distance of the body from the front end in the segments 14-16.
(c) Moulting — The casting off and the regrowing of the exoskeleton is collectively called moulting. It occurs in Arthropods.
(d) Diaphragm — A muscular structure separating thorax and abdomen internally in mammals is called diaphragm.
(e) Nocturnal animals — Animals that are active during night are known as nocturnal animals.
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Related Questions
Given below is a list of ten animals each followed by three terms or features. Underline the term which does not match with the animal.
- Amoeba — Nucleus, tentacle, food vacuole.
- Hydra — Invertebrata, Cnidaria, Crustacea.
- Fish — Gills, paired fins, ear drum.
- Earthworm — Invertebrata, Annelida, Insecta.
- Grasshopper— Wings, trachea, proboscis.
- Butterfly— Insecta, Invertebrata, Mollusca.
- Whale — Gills, mammary glands, fat under the skin.
- Pigeon — Feathers, wings, hair.
- Monkey — External ear, sweat glands, lateral line.
- Bat — Aves, Mammalia, Chordata.
Name these:
(a) Five kingdoms under the recent scheme of classification.
(b) Five divisions of kingdom Plantae.
(c) Eight phyla of Invertebrates.
(d) Five classes of Chordata.
(e) Two types of fishes on the basis of their skeletons.
Write the specific location and function of:
(a) Microscopic spicules or elastic spongin fibre
(b) Tentacles
(c) Parapodium
(d) Fins
(e) Feathers
Rearrange the following categories of classification in their proper sequence starting with the highest.
species, family, genus, class, order, phylum.