Consider the following statements concerning food chains

(i) Removal of 80% tigers from an area resulted in greatly increased growth of

vegetation

(ii) Removal of most of the carnivores resulted in an increased population of deers

(iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss

(iv) The length of food chains may vary from 2 to 8 trophic levels

Which two of the above statements are correct?

1. ii and iii

2. iii and iv

3. i and iv

4. i and ii

Subtopic:  Energy Flow |
 77%
NEET - 2008
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Quercus species are the dominant component in

1. temperate deciduous forests

2. alpine forests

3. scrub forests

4. tropical rain forests

NEET - 2008
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which of the following ecosystem types has the highest annual net primary productivity ?

1. Tropical rain forest

2. Tropical deciduous forest

3. Temperate evergeen forest

4. Temperate deciduous forest

Subtopic:  Ecosystem Productivity |
 83%
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Which one of the following is not used for construction of ecological pyramids?

1. Dry weight

2. Number of individuals

3. Rate of energy flow

4. Fresh weight

Subtopic:  Ecological Pyramids |
 80%
From NCERT
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In a lake that undergoes thermal stratification, blooms of phytoplankton tend to occur

1. before thermal stratification 

2. after thermal stratification 

3. at the onset of thermal stratification 

4. at the mid-phase of thermal stratification 

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Photosynthesis is absent in 

1. aphotic layer                 

2. photic layer        

3. benthic layer                 

4. pelagic layer.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 70%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

The given type of ecological pyramid represents

 

1. pyramid of numbers in tree ecosystem

2. pyramid of biomass in a fallow land 

3. pyramid of biomass in a lake

4. energy pyramid in a spring

Subtopic:  Ecological Pyramids |
 64%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which of the following zones of a lake is habitat for snails, slugs and microorganisms?

1. Littoral

2. Limnetic

3. Benthic

4. Profundal

Subtopic:  Components & Types of Ecosystems |
 57%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered

as occupying

1. first trophic level

2. second trophic level

3. third trophic level

4. fourth trophic level.

Subtopic:  Energy Flow |
 53%
AIIMS - 2003
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

Given below is one of the types of ecological pyramids

 

This type represents

(1) pyramid of numbers in a forest

(2) pyramid of biomass in a fallow land

(3) pyramid of biomass in a lake

(4) energy pyramid in a spring.

Subtopic:  Ecological Pyramids |
 74%
AIIMS - 2005
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints