During ecological succession

(1) the gradual and predictable change in species composition occurs in a given area

(2) the establishment of a new biotic community is very fast in its primary phase

(3) the numbers and types of animals remain constant

(4) the changes lead to a community that is in near equilibrium with the environment and is called pioneer community

Subtopic:  Ecological Succession (OLD NCERT) |
 72%
From NCERT
NEET - 2015
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 ecosystem has the maximum biomass?

(1) Forest ecosystem 

(2) Grassland ecosystem 

(3) Pond ecosystem 

(4) Lake ecosystem 

Subtopic:  Components & Types of Ecosystems |
 73%
NEET - 2017
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Th primary producers of the deep-sea hydrothermal vent ecosystem are

(1) green algae

(2) chemosynthetic bacteria

(3) blue-green algae

(4) coral reefs

Subtopic:  Energy Flow |
 59%
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which one of the following is a characteristic feature of cropland ecosystem?

(1) Least genetic diversity

(2) The absence of weeds

(3) Ecological succession

(4) The absence of soil organisms

Subtopic:  Components & Types of Ecosystems |
 54%
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following would appear as the pioneer organisms on bare rocks?
(1) Liverworts

(2) Mosses

(3) Green algae

(4) Lichens

Subtopic:  Ecological Succession (OLD NCERT) |
 89%
From NCERT
NEET - 2016
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 term ecosystem was coined by

(1) AG Tansley                 

(2) E Haeckel

(3) E Warming                 

(4) EP Odum

Subtopic:  Introduction |
 65%
NEET - 2016
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

In which of the following both pairs have the correct combination?

1. Gaseous nutrient cycle
Sedimentary nutrient cycle 
Carbon and nitrogen
Sulphur and phosphorus
2.  Gaseous nutrient cycle
Sedimentary nutrient cycle 
Carbon and sulphur
Nitrogen and phosphorus
3. Gaseous nutrient cycle
Sedimentary nutrient cycle
Nitrogen and sulphur
Carbon and phosphorus
4. Gaseous nutrient cycle
Sedimentary nutrient cycle
Sulphur and phosphorus
Carbon and nitrogen 
Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 88%
From NCERT
NEET - 2015
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

Vertical distribution of different species occupying different levels in a biotic community is

known as 

1. divergence

2. stratification

3. zonation

4. pyramid

Subtopic:  Introduction |
 92%
From NCERT
NEET - 2015
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

Secondary succession takes place on/in

(1) bara rock

(2) degraded forest

(3) newly created pond

(4) newly cooled lava

Subtopic:  Ecological Succession (OLD NCERT) |
 85%
From NCERT
NEET - 2015
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 mass of living material at a tropic level at a particular time is called

1. Gross primary productivity

2. Standing state

3. Net primary productivity

4. standing crop

Subtopic:  Ecosystem Productivity |
 70%
From NCERT
NEET - 2015
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