Questions & answers for Chapter 9 The living organisms

(a)lives.

Explanation: Habitat means a dwelling place. It is the place where an organism lives. All organisms depend on their habitat for food, water, air and shelter.

(b) pond.

Explanation:Terrestrial habitat is the one in which the plants and animals live on land. So grassland, forest, coastal and mountain are all examples of terrestrial habitats.

(c) sprouts.

Explanation:When the seeds like chana and moong are soaked overnight they give out sprouts. This process of seeds giving out sprouts is called germination and the seeds are said to be germinating. It is the beginning when a new plant starts growing from a seed.

(c)leaf.

Explanation:Photosynthesis is the process by which leaves prepare food for the whole plant. But in desert plants the leaves are reduced to spines so the process of photosynthesis is carried out by the stem. Stems of desert plants are thick and green.

(b) desert adaptation.

Explanation: Camels are adapted to live in a desert that means their bodies have special features which help them to live in the desert. It has long legs to keep its body away from hot sand. Its dung is dry and it excretes small amount of urine to save the water present in their bodies. It does not sweat much because that would mean less loss of water and they have to save water in their bodies.

(b) desert adaptation

Explanation: Camels are adapted to live in a desert that means their bodies have special features which help them to live in the desert. It has long legs to keep its body away from hot sand. Its dung is dry and it excretes small amount of urine to save the water present in their bodies. It does not sweat much because that would mean less loss of water and they have to save water in their bodies.

Explanation:Camels are adapted to live in a desert that means their bodies have special features which help them to live in the desert. It has long legs to keep its body away from hot sand. Its dung is dry and it excretes small amount of urine to save the water present in the body. It does not sweat much to conserve water.

(b) desert adaptation.

Explanation:The desert snakes and rats live in deep burrows to escape the intense heat of the desert. They remain in the burrows during the day and come out only at night when it becomes cooler.

(d) high altitude mountain ranges.

Explanation:The trees in the mountain region are adapted to the climatic conditions present there. As a result they have sloping branches and needle like leaves so that the snow which falls on them can slide off easily and they do not suffer any damage The adaptation also helps in water conservation.

(a) dry grasslands.

Explanation:The light brown colour of the lion’s body helps it to hide in the dry grasslands from its prey while hunting.

(a) respiration.

Explanation:Whales are mammals and do not breathe through gills like other aquatic animals.They breathe through blowholes which are present on the upper parts of their heads. They come to the surface of the water to breathe in the air and can stay in water for a long time without breathing.

(c) oxygen.

Explanation: Respiration is the process in which oxygen is used by the organism to produce energy. Breathing is taking in of oxygen rich air and giving out of carbon dioxide rich air. Inhaling is taking in of oxygen gas rich air while exhaling is giving out of carbon dioxide gas rich air.

(b) photosynthesis.

Explanation:Plants use carbon dioxide gas for photosynthesis and for respiration they use oxygen gas and give out carbon dioxide gas.

(b) respiration.

Explanation:Plants use carbon dioxide gas for photosynthesis and for respiration they use oxygen gas and give out carbon dioxide gas.

(c) excretion.

Explanation:Excretion is the process of getting rid of harmful wastes in plants and animals. Accumulation of waste material can be toxic to the organism.

(b) duck.

Explanation:Webbed feet help ducks to swim in water.

(d) frog.

Explanation:Frogs can live both in water and on land. They are called amphibians. So their body has adaptations to live easily both on land and in water. It has strong hind legs to move and jump on land to catch its prey while webbed feet help it to move in water.

(d) radius.

Explanation:Usually aquatic animals have streamlined bodies but octopus is an aquatic animal which has a nearly spherical shape with tentacles. It stays deeper in the ocean near the seabed and catches the prey that moves near it. But when it moves in water it makes its body shape streamlined.

(b) bat.

Explanation:Bat is a mammal and nocturnal (active during the night) whereas the others are birds and diurnal (active during the day).

(d) ocean.

Explanation:Ocean is a water body consisting of saline water,whereas river, pond and well are examples of fresh water body.

(a) cold habitat.

Explanation:Penguins inhabit the frozen south pole.Cold habitat is characterized by low temperatures, short vegetation, long winters, brief growing seasons, and limited drainage.

(a) cold habitat.

Explanation: Cold habitat is characterized by low temperatures, short vegetation, long winters, brief growing seasons, and limited drainage.

(b) cockroach.

Explanation:The animals which are active during night are called nocturnal animals. E.g. cockroach, owl, bats etc.

(c) earthworm.

Explanation: Earthworm breathes through its skin while the other animals use spiracles and trachea for breathing..

(a) carbon dioxide.

Explanation: Respiration is the process in which the oxygen is used by the organism to produce energy. Breathing is taking in of oxygen rich air and giving out of carbon dioxide rich air. Inhaling is taking in of oxygen rich air while exhaling is giving out of carbon dioxide rich air.

(a) respiration.

Explanation:Dolphins do not breathe through gills like other aquatic animals they breathe through blowholes which are present on the upper parts of their heads. They come to the surface of the water to breathe in the air and can stay in water for a long time without breathing.