Hypotheses Explaining Latitudinal Gradient of Biodiversity

Q.

Most animals are tree-dwellers In a?

1. Tropical rainforest

2. Coniferous forest

3. Thorn woodland

4. Temperate deciduous forests

Q.

How does sunlight help tropical ecosystems develop relatively more vibrant flora and fauna?

1. Most animals are diurnal and thus, found in regions with more sunlight

2. Sunlight generates heat, which is needed for plants and animals to grow

3. Sunlight is the primary source of energy from which all biomass is created on Earth

4. None of the above

Q. Which region has the highest diversity in terms of number of species?

1. Tropical region
2. Sub-tropical region
3. Arctic region
4. Desert region

Q. A small limited habitat within a larger, more extensive habitat is called a microhabitat.

With regard to the assertion and reason, choose the correct option:

Assertion [A]: Rainforests show high biodiversity.
Reason [R]: Rainforests have a large number of microhabitats.

1. Both A and R are correct and R explains A
2. Both A and R are correct but R does not explain A
3. A is incorrect but R is correct
4. Both A and R are incorrect

Q.

Which among the following statements explains why tropical regions have a richer biological diversity than other regions?

1. Mass extinction of life forms in polar and sub-polar regions

2. The only types of soil that are fertile enough for most of the plant species are found in the tropic region

3. The tropical region of the earth is characterised by constant and stable climate which is easy for organisms to adapt to

4. Organisms do not have enough food resources in the non-tropical regions on earth

Q. State whether true or false:
Rainforest is a homogenous habitat.

1. True
2. False

Q.

Read the statements A and B. Identify the correct option.
Statement A: Diversity observed in an entire geographical area is called gamma diversity.
Statement B: Biodiversity decreases as you move from a higher altitude towards a lower altitude.

1. Both the statements A and B are correct

2. Both the statements A and B are wrong

3. Statement A is correct, B is wrong

4. Statement B is correct, A is wrong

Q. Which of the following statements is/are true?

I. Temperate regions have more species diversification than tropical regions
II. Tropical environments have more species diversity than temperate regions
III. Niche specialisation is observed more in temperate regions
IV. Higher productivity is seen in tropical regions

1. I and II
2. III only
3. IV only
4. II and IV