NCERT Solutions Class 6 Science Chapter 9 The Living Organisms and Their Surroundings

NCERT Solutions for Class 6 Science for Biology chapter 9 The Living Organisms and Their Surroundings

Exercises

Question. What is a habitat?

Answer: Habitat is a place or environment where an organism lives. Habitat fulfills the requirement of food, shelter, air, water and other needs of an organism that are necessary for its survival.
 

Question.2 How are cactus adapted to survive in a desert?

Answer: Cactus is adapted to survive in the hot and dry conditions of a desert. Following are the adaptations that help a cactus to survive in desert:

1. Leaves of cactus are present in the form of spine to reduce water loss by transpiration
2. Roots of cactus are very long that go deep inside the soil to absorb water.
3. Stem of cactus have a thick waxy coating that helps in water retentio
 

Question.3 Fill in the blanks

a) The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called _______.
b) The habitats of plants and animals that live on land are called ________ habitat.
c) The habitats of plants and animals that live in water are called _________ habitat.
d) Soil, water and air are the ______ of a habitat factors
e) Changes in our surroundings that make us respond to them are _________ called.

Answer:

a) The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called adaptation.
b) The habitats of plants and animals that live on land are called terrestrial habitat.
c) The habitats of plants and animals that live in water are called aquatic habitat.
d) Soil, water and air are the abioticfactors of a habitat.
e) Changes in our surroundings that make us respond to them are called stimuli.
 

Question.4 Which of the things in the following list are non-living?

Plough, Mushroom, Sewing machine, Radio, Boat, Water hyacinth, Earthworm

Answer: In the above mentioned list plough, sewing machine, radio and boat are non-living.
 

Question.5 Give an example of a non-living thing, which shows any two characteristics of living things?

Answer: Vehicles such as cars, buses, etc show following two characteristics of living things:

1. Movement and
2. Energy requirement
 

Question.6 Which of the non-living things listed below, were once part of a living thing?

Butter, Leather, Soil, Wool, Electric bulb, Cooking oil, Salt, Apple, Rubber

Answer: The non-living things butter, leather, wool, cooking oil, apple and rubber were once part of a living thing.
 

Question.7 List the common characteristics of the living things.

Answer: Following are common characteristics of living things:

1. Growth
2. Feeding
3. Respiration
4. Excretion
5. Movement
6. Reproduction
7. Response to stimuli
 

Question.8 Explain why speed is important for survival in the grassland for animals that live there. (Hint: There are few trees or places for animals to hide in grasslands habitats.)

Answer: In grasslands, mainly grasses are found with a very few trees. Big carnivores such as lions, tigers etc feed upon their preys that are found in these grasslands. It is very easy to find their prey in these regions as there is hardly any space to hide. Preys are left with only one choice that is running out from their predators. Hence, to protect themselves from their predators, preys adapt themselves by increasing their speed and increase their chance of survival in these regions.