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प्रश्न
Write down four characters of mammals. Give two examples.
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उत्तर
Characteristics of mammals:
(i) Their body is divisible into head, trunk, neck and tail. Cutaneous glands such as sweat glands, scent glands and sebaceous glands are present.
(ii) Females have mammary glands which secrete milk for the nourishment of the young.
(iii) A muscular diaphragm separates thoracic and abdominal cavities and respiration takes place through lungs only.
(iv) Two pairs of pentadactyl limbs are present. Teeth are thecodont and heterodont.
Example: Macropus and Rattus, Macaca.
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संबंधित प्रश्न
Tick (✓) the appropriate answer:
Scientist who introduced binomial nomenclature is
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:
Write down four main characters of Annelida.
What do you mean by the term coelomate animals? Give two examples.
Write down four general characters of phylum Arthropoda. Give two examples.
Give four general characters of phylum Mollusca. Write down two examples.
What are adaptations in fishes due to which they are aquatic?
Distinguish between Nonchordata and Chordata.
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Explain the general charaters of phylum Mollusca. Give one example of following classes of Mollusca;
(i) Gastropoda;
(ii) Pelecypoda;
(iii) Cephalopoda.
Give four important characters of mammals.
Fill in the blanks:
Dog fish belongs to phylum ______.
Choose the correct answer: Jelly-fish is classified in the phylum
Choose the correct answer: Multicellular producers are
What is binomial nomenclature?
Kingdom Animalia is characterized by
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:
Consider the following statements:
- Annelids are true coelomates
- Poriferans are pseudocoelomates
- Aschelminthes are acoelomates
- Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below:
