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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
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 down four characteristics of Ctenophora and give two examples.
Write down four main characters of Platyhelminthes. Give two examples.
Write down four general characters of phylum Arthropoda. Give two examples.
Describe some flight adaptations of the birds.
Explain the general characters of phylum Arthropoda. Give one example of following classes
(i) Crustacea;
(ii) Myriapoda;
(iii) Insecta;
(iv) Arachnida.
Describe the important characters of mammals and birds. Give two examples of each.
What are the group names of the following categories of animals?
Animals with a hairy skin ___________
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
Name three animals (belonging to different classes) which breathe by means of lungs but have no external ears (pinnae).
Match the names of animal groups in Column I with the names of animals in column II.
|
Column I (Group) |
Column II (Animals) |
|
Annelida |
Pigeon |
|
Porifera |
Snake |
|
Mollusca |
Earthworm |
|
Reptilia |
Sponge |
|
Amphibia |
Octopus |
|
Pisces |
Trout |
|
Mammal |
Rabbit |
Which names are left out that do not match and why?
TYRANNOSAURUS
(One of the extinct animals which lived on the Earth about 100,000,000 years ago) Tyrannosaurus was about six meters long and it preyed upon other animals.
What do you think about its classification-was it an amphibian, a reptile or a mammal?
Can you call it a relative of Kangaroo? Yes/No. Give reason
Fill in the blanks:
Dog fish belongs to phylum ______.
Choose the correct answer: Mosquito is included in insects because
Choose the correct answer: Jelly-fish is classified in the phylum
Choose the correct answer: The animal of phylum protozoa is
Carolus Linnaeus is known as the Father of ______.
True (or) False. If false write the correct answer.
True nucleus is seen in prokaryotic cell.
Give scientific reasons.
Body temperature is not constant in amphibians.
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:
