Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?                                                 

 
 

1.  Level PC is "insects" and level SC is "small insectivorous birds".
2.  Level PP is "phytoplanktons" in sea and "Whale" on top level TC
3.  Level PP is "pipal trees" and level SC is "sheep".
4.  Level PC is "rats" and level SC is "cats".

Subtopic:  Ecological Pyramids |
 53%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Which one of the following is not a functional unit of an ecosystem 
1. Energy flow
2. Decomposition
3. Productivity
4. Stratification

Subtopic:  Components & Types of Ecosystems |
 82%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


The upright pyramid of number is absent in      
1. Pond
2. Forest
3. Lake
4. Grassland

Subtopic:  Ecological Pyramids |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Identify the likely organisms (a), (b), (c) and (d) in the food web shown below:     

Options

(a)

(b)

(c)

(d)

1.

deer

rabbit

frog

rat

2.

dog

squirrel

bat

deer

3.

rat

dog

tortoise

crow

4.

squirrel

cat

rat

pigeon

Subtopic:  Energy Flow |
 90%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

The rate of formation of new organic matter by rabbits in grassland is called:

1. Net productivity 2. Secondary productivity
3. Net primary productivity 4. Gross primary productivity
Subtopic:  Ecosystem Productivity |
 81%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


The second stage of hydrosere is occupied by plants like :   
1. Azolla
2.Typha
3.Salix
4. Vallisneria

Subtopic:  Ecological Succession (OLD NCERT) |
 65%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Natural reservoir of phosphorus is :    
1. Animal bones
2. Rock
3. Fossils
4.Sea water

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 87%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Secondary productivity is rate of formation of new organic matter by:  
1. Parasite
2. Consumer
3. Decomposer
4. Producer

Subtopic:  Ecosystem Productivity |
 89%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?                                                                        
plant → mice → snake → peacock
1. 0.02 J
2. 0.002 J
3. 0.2 J
4. 0.0002 J

Subtopic:  Ecological Pyramids |
 71%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.                                                            

Options :

A

B

C

D

1.

Rock minerals

Detritus

Litter fall

Producers

2.

Litter

Producers

Rock minerals 

Detritus

3.

Detritus 

Rock minerals

Producer

Litter fall

4.

Producers

Litter fall

Rock minerals 

Detritus

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
 81%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.