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प्रश्न
Main characteristics of Nematoda:
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उत्तर
Main characteristics of Nematoda:
(i) They are bilaterally symmetrical, triploblastic, pseudocoelomate and unsegmented animals.
(ii) They have a cylindrical or flattened, worm-like body.
(iii) Sexes are separate.
(iv) Body is covered with a tough, resistant cuticle.
Examples: Ascaris (round worm) and Wuchereria bancrofti (filarial worm).
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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 |
Write one difference between the following pair:
Invertebrates and Vertebrates
Define the term hermaphrodite. Give two examples.
Write down four general characters of phylum Echinodermata. Give two examples.
Name the phylum in which ambulacral system is present. What is its function?
What are differences between the following :
(a) Cartilaginous fishes and bony fishes ;
(b) Amphibia and Reptilia ;
(c) Aves and mammals.
Write down four main characters of chordates.
Write short note on protochordates.
Explain the general charaters of phylum Mollusca. Give one example of following classes of Mollusca;
(i) Gastropoda;
(ii) Pelecypoda;
(iii) Cephalopoda.
Why are scientific names of living beings considered better than their common names?
Name three animals (belonging to different classes) which breathe by means of lungs but have no external ears (pinnae).
Write down a flow chart showing subdivisions of kingdom Animalia.
Give four important characters of mammals.
Write two main characters of the following animal and name the phylum it belongs to: Whale
Give two examples of each of the following: Pisces
Choose the correct answer: Jelly-fish is classified in the phylum
Choose the correct answer: The animal of class pisces is
Choose the correct answer: Which of the following is not a helminth parasite?
Assertion: Binomial name is the universal name and contains two names.
Reason: It was first introduced by Carolus Linnaeus
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.
In the light of the above statements, choose the correct answer from the options given below:
