The standing crop is measured as the-

1. Mass of living organisms in a unit area.

2. The number of living organisms in a unit area.

3. Calculated from the net primary productivity

4. Both 1 and 2.

Subtopic:  Energy Flow |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Why does the number of trophic levels in the grazing food chain is restricted ?

1. As the transfer of energy follows 10 per cent law

2. So that food chain remains short

3. As there are few species the community

4. So that transfer of energy could be more efficient.

Subtopic:  Energy Flow |
 85%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

What does 10 per cent law say?

1. Less than 10 per cent of the energy is transferred to each trophic level from the lower trophic level
2. Only 10 per cent of the energy is transferred to each trophic level from the lower trophic level
3. Only 10 per cent of the energy is assimilated from the eaten food
4. Consumer gains 10 per cent mass of the consumed food
Subtopic:  Energy Flow |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The base of each pyramid represents the _________or the ___________level while the apex represents ____________
1. Consumers, first trophic and top trophic level
2. Producers, first trophic and top trophic level
3. Producers, second trophic and top trophic level
4. Consumers, second trophic and top trophic level

Subtopic:  Ecological Pyramids |
 92%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Identify the relationship represented by the pyramid

1. Pyramid of number

2. Pyramid of biomass

3. Pyramid of energy

4. None of the above

Subtopic:  Ecological Pyramids |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following pyramid represents the pyramid of number in grassland?

       

                          A

              

                        B

                          C

1. A

2. B

3. C

4. B & C

Subtopic:  Ecological Pyramids |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statement is incorrect?

1. Only three top-carnivores are supported in an ecosystem based on production of nearly 6 million plants.
2. Pyramid of biomass shows a sharp increase in biomass at higher trophic levels.
3. Pyramid of biomass is inverted if small standing crop of phytoplankton supports large standing crop of zooplankton.
4. Pyramid of energy is always upright.
Subtopic:  Ecological Pyramids |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

If the available energy at first trophic level is 10000 J then how much trophic levels it could support further?

1. 2

2. 3

3. 4

4. 5

Subtopic:  Energy Flow |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statement is incorrect?

1. Any calculations of energy content, biomass or numbers, has to include all organisms at that trophic level.
2. The base of each pyramid represents the producers or the first trophic level while the apex represents tertiary or top level consumer.
3. The trophic level represents a functional level, not a species as such.
4. A given species occupies only one trophic level in the same ecosystem at the same time.
Subtopic:  Ecological Pyramids |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The pyramid of biomass in the sea is generally

1. Upright

2. Inverted

3. Bell-shaped

4. Rectangular, stable.

Subtopic:  Ecological Pyramids |
 90%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh