1.

Read the table and answer the following questions.S.No.Region of the pondOrganisms living in that region1.Above the surfacedragonfly, mayfly and kingfisher, hovering above the pond and then resting over a bamboo pole or a stick jutting out of the surface of the pond. They get food from the surface of the pond.2.On the surfacewhirling beetle, pond skater, larva of mayfly and dragonfly, Plants like pistia float on the surface completely while those like the lotus have roots going deep under. [Organisms on the surface are easily eaten up by others because there is little protection for them.] However, there is plenty of food and air. Fish usually come to the surface for food.3.Pond marginsSeveral grasses, frogs, cranes, crabs etc. Fish usually lay eggs here.4.MidwaterGreat water boatman, leech and mosquito larva are found in this region. Fish and crabs also swim around this region.5.Bottom of the pondThis region has plants like Hydrilla and animals like mussels, flatworms and some maggots (larvae of some insects). Light is minimum here, but food, in the form of dead and decaying matter is plenty.i) Name some organisms in the pond that can stay in different regions in the same pond?ii) What makes them stay in different regions in the pond?iii) Can different places in the pond also be called as habitat? Why? or why not?iv) Is there any animal with legs in the pond?v) Do all animals in the pond have tails?vi) Do all animals in the pond swim?vii) What are the animals that share the surface of the pond as habitat?viii) Are the leaves of all plants growing in a pond, similar?ix) What is the difference between the leaves of a plant growing at the bottom (hydrilla) and that floating on the surface (lotus)? Try to think and write why we find such differences.

Answer»

i) Frogs, cranes, crabs.

ii) Their food habits and body structure makes them stay in different regions in the pond.

iii) Yes, particular organisms are live in different places in the pond. So it be called as habitat.

iv) Yes, the frog has legs.

v) No, all the animals in the pond does not have tail.

vi) No, crane can’t swim.

vii) Whirling beetle, pond skater, larva of mayfly and dragonfly.

viii) No, the leaves of all plants growing in a pond are not similar. They are of different types. Ex : Hydrilla, Lotus.

ix) 

a) The leaves of a plant growing at the bottom (hydrilla) have small tubular leaves to pass water flow.

b) Floating on the surface (lotus) plants have large leaves to grasp sunlight.



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