CBSE
Multiple Choice QuestionsGiven below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?
Level PC is insects and level SC is small insectivorous birds
Level PP is phytoplanktons in sea and Whale on top level TC
Level on PP is pipal trees and the level SC is sheep
Level on PP is pipal trees and the level SC is sheep
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.
|
A |
B |
C |
D |
|
Rock Minerals |
Detritus |
Litter fall |
Producers |
|
A |
B |
C |
D |
|
Litter fall |
Producers | Rock minerals |
Detritus |
|
A |
B |
C |
D |
|
Detritus |
Rock minerals | Producer |
Litter fall
|
|
A |
B |
C |
D |
|
Detritus |
Rock minerals | Producer |
Litter fall
|
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
Sulphur cycle
Phosphorus cycle
Nitrogen cycle
Nitrogen cycle
Identify the possible link A in the following food chain
Green plant 
Insect 
Frog 
A 
Eagle
rabbit
wolf
cobra
cobra
Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A - D) represent respectively?
|
A |
B |
C |
D |
|
Insects |
Crustaceans |
other animal group |
Molluscs
|
|
A |
B |
C |
D |
|
Crustacean |
Insects | Molluscs | other animal groups |
|
A |
B |
C |
D |
|
Molluscs |
Other animal groups | Crustaceans | Insects |
|
A |
B |
C |
D |
|
Molluscs |
Other animal groups | Crustaceans | Insects |
Which one of the following is not a functional unit of an ecosystem?
Energy flow
Decomposition
Productivity
Productivity
The upright pyramid of number is absent in
pond
forest
lake
lake
Most animals that in deep oceanic water are
primary consumers
secondary consumers
tertiary consumers
tertiary consumers
The rate of formation of new organic matter by rabbit in a grassland is called
net productivity
secondary productivity
net primary productivity
net primary productivity
Deficiency symptoms of nitrogen and potassium are visible first in
senescent leaves
young leaves
roots
roots
