Advertisements
Advertisements
प्रश्न
Describe some flight adaptations of the birds.
उत्तर
Adaptations in birds for flight:
(i) Possess a spindly or boat-shaped body covered mostly by feathers.
(ii) Forelimbs are modified into wings for flight.
(iii) Bones are light and spongy due to presence of air cavities.
APPEARS IN
संबंधित प्रश्न
How do poriferan animals differ from coelenterate animals?
How do annelid animals differ from arthropods?
What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Prepare a list of some animals that are found parasitic on human beings.
Write down four characteristics of Ctenophora and give two examples.
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.
Distinguish between Nonchordata and Chordata.
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?
Write two main characters of the following animal and name the phylum it belongs to: Whale
Give the name of two animals that belong to phylum echinodermata.
Give two examples of each of the following: Arthropoda
Fill in the blanks:
The excretory organs of platyhelminthes are ______.
Fill in the blanks:
Dog fish belongs to phylum ______.
Choose the correct answer: The animal of phylum mollusca is
Choose the correct answer: 'Systema naturae' has been written by
Assertion: Binomial name is the universal name and contains two names.
Reason: It was first introduced by Carolus Linnaeus
Assertion (A): Reptiles are warm-blooded animals.
Reason (R): They have scales.
Give scientific reasons.
Body temperature is not constant in amphibians.
