Fish breathes through gills which take up dissolved oxygen present in water. When it is kept out of the water, it is unable to respire due to difference in pressure of gas. Hence, it dies.

If an organism fails to adapt to its environment, the possible consequences could be:
(i) The organism will die.
(ii) The species will become extinct

Yes, the following features of a lion help it to survive:
(i) Light brown colour of skin-It helps it to hide in dry grasslands when it hunts for prey.
(ii) Eyes in front of the face--Allow it to have a correct idea about the location of its prey.

A habitat includes
(i) a living component which is called as biotic.
(ii) non-living component called abiotic.

Deer have following specific features that help it to detect the presence of predators like lion
(i) Long ears to hear movement of predators.
(ii) Eyes on the sides of its head which allow it to look in all directions.

(a) Camels have long legs to keep their bodies away from the heat of sand.
(b) Frogs have webbed feet that enable them to swim.
(c) Dolphins and whales have blow holes which help them to breathe in air when they swim near the surface of water.

We see the following movements in plants
(i) Opening and closing of flower.
(ii) Growth of stem and leaves.
(iii) Growth of stem and twigs towards light and roots towards soil and water.

Paheli can increase the numbers of rose plants in the garden by planting stem cutting of the rose plant. This will lead to reproduction.

In grasslands, there are limited number of trees and places for animals to hide. When the enemy attacks an animal, it has to run fast, so as to reach a safe place. if it fails, it has to loose its life. So, speed in such places as grasslands is very important for the survival of animals.

To survive in a desert, a cactus has the following adaptations:
(i) Leaves modified into spine or absent to prevent water loss through transpiration.
(ii) Stem is modified to perform photosynthesis and covered with a thick waxy layer to retain water.
(iii) The root system of cactus is well developed and grows deep for absorbing water.

Yanks have long hair and leopard has thick fur on its body including feet and toes to prevent them from extreme cold.

Crocodile has very strong jaws, very hard back cover and can live on land also. It can live hungry for quite a long time. It is a social animal and does sharing with group.

Animals in aquatic habitat have streamlined bodies which help them in surviving underwater.

Animals unable to cope in harshen conditions go to sleep to prevent extreme cold and food shortage, this is known as hibernation.

Animals living in colder areas have hairy skin to warm their bodies and they have thick layer of fat under their skin.

Reproduction is important for organism as it leads to the production of more individuals of an organism of its own kind. This helps in continuity of life on the earth.

The habitats can be classified as:
Terrestrial habitats - Grassland and rice field
Aquatic habitats - Pond and ocean

(a) The diagram is of a deer which lives in grassland.
(b) The diagram is of a frog which lives in pond.
(c) The diagram is of a yak which lives in mountain.
(d) The diagram is of a camel which lives in desert.

The desert plants have reduced leaves and thick fleshy stem.

Seeds respire so, it can be identified as living beings.

There are following adaptive features of a lion that help it in hunting:
(i) Light brown colour of skin, which helps it to hide in dry grasslands when it hunts for prey.
(ii) Eyes in front of face, which help it to know the correct location of its prey.
(iii) Powerful paws and long claws, which help it . to catch and kill the prey

Cactus is mostly found in the deserts.
It has the following special features to adapt itself to survive in the desert :
(i) Leaves are modified into the spines to reduce the rate of loss of water.
(ii) Stem becomes green and fleshy to take over the function of photosynthesis.
(iii) Stem is also covered with a thick layer of wax to retain water.
(iv) Its roots go deeper into the soil for better absorption of water.