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प्रश्न
Give four general characters of phylum Mollusca. Write down two examples.
उत्तर
General characteristics of phylum Mollusca:
(i) They have a soft, bilaterally symmetrical body with little segmentation and without appendages. Body cavity is haemocoel.
(ii) Body is divisible into an anterior head, a ventral foot and a dorsal visceral mass. The entire body is covered by a thin fold of skin called mantle, which secretes a hard calcareous shell of one or more pieces.
(iii) Respiration occurs via gills, mantle or a "lung" of the mantle.
(iv) Sexes are usually separate.
Examples: Chiton and Pila.
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संबंधित प्रश्न
Match the following:
| Column I | Column II | ||
| (a) | Operculum | (i) | Ctenophora |
| (b) | Parapodia | (ii) | Mollusca |
| (c) | Scales | (iii) | Porifera |
| (d) | Comb plates | (iv) | Reptilia |
| (e) | Radula | (v) | Annelida |
| (f) | Hairs | (vi) | Cyclostomata and Chondrichthyes |
| (g) | Choanocytes | (vii) | Mammalia |
| (h) | Gill slits | (viii) | Osteichthyes |
Match the animals given under column A with their respective classification group given under column B
| Column A | Column B | ||
| 1 | Sponge | a | Amphibia |
| 2 | Snail | b | Reptilia |
| 3 | Butterfly | c | Echinodermata |
| 4 | Toad | d | Mollusca |
| 5 | Lizard | e | Arthropoda |
| 6 | Starfish | f | Porifera |
Main characteristics of Nematoda:
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Write down four characters of Chondrichtyes. Give two examples.
Write down four characters of mammals. Give two examples.
Give an example each of Urochordata and Cephalochordata.
Write down four general characters of Porifera. Give two examples.
Give any one difference between the following :
Insecta and Arachnida
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Butterfly- Insecta, Invertebrata, Mollusca
Write down a flow chart showing subdivisions of kingdom Animalia.
Give the name of two animals that belong to phylum echinodermata.
Choose the correct answer: Whittaker is famous
Choose the correct answer: Binomial Nomenclature was proposed by
______ in 1623, introduced the binomial nomenclature.
True (or) False. If false write the correct answer.
True nucleus is seen in prokaryotic cell.
Write short notes on – Binomial Nomenclature.
Assertion (A): Reptiles are warm-blooded animals.
Reason (R): They have scales.
