Tag: let's plant trees

Questions Related to let's plant trees

Who is the father of Green revolution?

  1. Johannes Kepler

  2. Norman Borlaug

  3. Edwin Hubble

  4. Nikola Tesla


Correct Option: B

Plants remove carbon in the form of:

  1. Carbonates

  2. Carbon monoxide

  3. Bicarbonates

  4. Carbon dioxide


Correct Option: D
Explanation:

Plants remove carbon in the form of carbon dioxide from the atmosphere during the process of photosynthesis.

Which of the following provides nutrients to the seedlings to grow in forests?

  1. Bacteria

  2. Fungi

  3. Decaying animal dung

  4. Beetles and grubs


Correct Option: C
Explanation:

Animals living in the forest include herbivores and carnivores. The dung of these animals are decomposed by insects living in the soil. This contributes to the fertility of the soil by adding organic matter and nutrients, such as nitrogen, that is trapped by bacteria in the soil. This provides nutrients to the seedlings to grow in forests. Thus the correct answer is option C.

What is reforestation?

  1. Cutting of trees.

  2. Restocking of the destroyed forests by planting new trees.

  3. Conversion of fertile soil into forest.

  4. Conversion of forest into fertile soil.


Correct Option: B
Explanation:

Reforestation is restocking of the destroyed forest by planting new trees. We should plant at least as many trees as we cut. Reforestation can take place naturally also.

Thus, the correct answer is option B.

Deforestation is caused due to

  1. grazing

  2. timber

  3. Cultivation

  4. all of these


Correct Option: D

What is the effect of deforestation on amount of $CO _2$ in atmosphere?

  1. It increases

  2. It decreases

  3. It remains unchanged

  4. Cannot be predicted


Correct Option: A
Explanation:

Deforestation is the permanent destruction of forests in order to make the land available for other uses. Deforestation has many negative effects on the environment. The most dramatic impact is a loss of habitat for millions of species. Seventy percent of Earth's land animals and plants live in forests, and many cannot survive the deforestation that destroys their homes. Deforestation also drives climate change. Since, trees purify air by absorbing carbon dioxide from atmosphere, loss of trees would result into increase in level of carbon dioxide.

Deforestation refers to

  1. planting of trees

  2. cultivation of crops

  3. disappearance of forests

  4. development of plantation


Correct Option: C

Most fertile layer of soil is

  1. top layer

  2. organic layer

  3. middle soil layer

  4. all of these


Correct Option: A

Plants control the humidity in air by

  1. Photosynthesis

  2. Transpiration

  3. Photorespiration

  4. All of the above


Correct Option: B
Explanation:

Plants absorb water from the soil and looses it to the atmosphere by transpiration,hence,control the humidity in air by acting as a water exchanger between ground and atmosphere.

Deforestation causes__________ to linger in the atmosphere.

  1. $CO _2$

  2. $H _2O$

  3. $O _2$

  4. $N _2$


Correct Option: A
Explanation:

Deforestation causes carbon dioxide to linger in the atmosphere. As carbon dioxide accrues, it produces a layer in the atmosphere that traps radiation from the sun. The radiation converts to heat which causes global warming, which is better known as the greenhouse effect.