Freshwater habitats include bogs, ponds, lakes, rivers and streams. A pond is a little bit like a lake.

The organisms that feed on the dead and decaying remains of plants and animals are called decomposers.

A habitat is an area that is inhabited by a particular species of animal or plant. It is a place where it can find food, shelter, protection and mates for reproduction.

Mesophytes are the largest group of terrestrial plants that live in a moist habitat.

Acclimatisation is the process of small adjustments by the body to overcome small changes in the surrounding atmosphere for a short period of time.

Temperature does not affect the lifespan of a species.

They breathe in air through nostrils or blowholes located on the upper part of their heads.

Cactus has a waxy surface with lots of water in it. It also has thorns to prevent loss of water.

Gills help in using oxygen dissolved in water.

Frogs have moist skin for exchange of gases in water.

Desert plants store large amount of water.

The animals that can fly have hollow bones that are called pneumatic bones.

Exchange of gases mainly takes place in plants through stomata present in leaves. 

They secrete small amount of urine because they have very active cells lining the urinary bladder that can re-absorb water from urine back to circulation.

Viviparous animals are those animals which do not lay eggs and give birth to young ones.