Question

A. Name the following:
1. It is present in the blood that combines with oxygen and carries it to all parts of the body. ____________
2. Aquatic animals breathe through this. _______________
3. It is present on the head of dolphins to help them breathe. _______________
4. An earthworm breathes through this. ________________
5. Frogs breathe through them when they are on land. ______________
6. Human beings use their limbs to walk, stand and run. _____________
B. Answer the following questions in brief.
1. Define ‘breathing’
______________________________________________________________________________________________________________________________________
2. Name two animals which breathe through their skins.
______________________________________________________________________________________________________________________________________
3. Define ‘migration’.
______________________________________________________________________________________________________________________________________
5. Mention two features of birds that help them to fly.
______________________________________________________________________________________________________________________________________

6. Describe the movement of fish in water.
______________________________________________________________________________________________________________________________________
C. Give reasons for the following:
1. The deer is not easily visible in the forest.
__________________________________________________________________________________________________________________________________________________________________________
2. Whales and dolphins come to the surface of water to breathe.
______________________________________________________________________________________________________________________________________
3. Kangaroos hop on their hindlimbs.
__________________________________________________________________________________________________________________________________________________________________________
4. Most of the birds can fly but penguins cannot.
_____________________________________________________________________________________
_____________________________________________________________________________________

Answer 1

1. Haemoglibin
2. Gills
3. Air holes
4. Skin (idk prolly this i forgot)
5. Lungs
6. True.

B.1- Breathing is a process in which an organism sucks in oxygen-rich air and lets- out CO2-rich air.
B.2- frogs when underwater and earthworms
B.3- migration is the annual interval movement of animals from one place to another in search of better environments/ breeding grounds.
B.4- their hollow bones and aero-dynamic shape.
B.6- i forgot.

C.1 Deer are not easily visible in the forest because their coloured fur helps them to camoflauge in the forest to escape predators.
C.2 Whales and dolphins come to the surface of the water to breathe as they have lungs instead of gills.
C.3 idk for a low-level. This answer would be too detailed for a low level, so idk.
C.4 Most birds can fly but penguins cannot as their bodies are too heavy and large for their wings to support flying.