Biosphere and Biodiversity

Q.

What are decomposers? Name any two of them. What do they do in the forest?

Q.

What is canopy

Q. All animals, whether herbivorous or carnivorous depend ultimately on plants for food.

1. True
2. False

Q. Which of the following are the components of biosphere?

1. Lithosphere
2. Hydrosphere
3. Atmosphere
4. Exosphere

Q. What is aquifer?

Q.

Trees provide us with food, shelter, and medicines.

1. True
2. False

Q.

Decomposers are

1. Autotrophs

2. Heterotrophs

3. Organotrophs

4. Autoheterotrophs

Q.

Are snails decomposers or detritivores?

Q.

A forest is a purifier of _____ and _______.

Q.

Herbs form the ___ layer in the forest.

Q.

What do you understand by the understoreys of a tree? [2 MARKS]

Q. A wide variety of living things is called:

1. diversity
2. biodiversity
3. habitat
4. population

Q. Biosphere reserves are specific places where conservation of a variety of life-forms (plants and animals) can be carried out.

1. True
2. False

Q. Which of the following is not a component of biosphere?

1. Hydrosphere
2. Lithosphere
3. Atmosphere
4. Exosphere

Q.

Tall trees which look like roof over other plants in the forest is called __.

Q.

A biosphere reserve is defined as an area where huge diversity and variety of life is kept to conserve the biodiversity.

1. True

2. False

Q.

Which one of the following is NOT in favour of the conservation of nature? (a) switch off the bulb when not in use (b) close the tap immediately after using (c) dispose poly packs after shopping - GK Q&A

1. switch off the bulb when not in use

2. close the tap immediately after using

3. dispose poly packs after shopping

Q.

Biosphere reserves do not contain wildlife sanctuaries but may contain national parks. Say true or false.

1. True

2. False

Q.

Question 1
Explain how animals dwelling in the forest help it grow and regenerate.

Q. Environmentalists suggest planting trees near the river banks. Which of the following reason justify the statement?

1. Trees provide oxygen
2. Trees prevent soil erosion
3. Trees are a source of firewood
4. Trees reduce rainfall

Q. Amazon valley forests has a dense canopy layer. What can be the effects of canopy on the forest?

1. Sunlight does not reach the ground
2. Rain does not reach the ground
3. Growth rate of understory becomes less
4. Fertility of soil increases

Q. Biosphere reserves do not contain wildlife sanctuaries but may contain national parks. Say true or false.

1. True
2. False

Q.

Question 5
Explain why there is no waste in a forest.

Q. are specific parts of natural landscapes extending over large area of terrestrial or coastal ecosystems where flora and fauna are protected.

1. Lithosphere
2. Biosphere reserve
3. Forest
4. Hydrosphere

Q.

Question 12
Which of the following statements is not correct?

(i) Forests protect the soil from erosion.
(ii) Plants and animals in a forest are not dependent on one another.
(iii) Forests influence the climate and water cycle.
(iv) Soil helps forests to grow and regenerate.

Q. Choose the correct pair on the basis of rainfall received by different forests.

1. Coniferous
2. Deciduous
3. Low
4. Moderate
5. Tropical
6. High

Q. Short / Long answer type questions.
Why are the fungi known as the great decomposers?

Q. Giant and tall trees forms the

1. Canopy
2. Understorey
3. Forest floor
4. None of the above

Q.

Question 10
In Fig. 17.15, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels: Clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.

Q.

Question 4
Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.