Ecosystem Pattern And Components Test
Ecosystem Pattern And Components
This is online test 02 for CBSE class 12 Biology Ecosystem (Ecosystem pattern and components).. There are 10 questions in this test with each question having around four answer choices.
Questions & Answers
1
Another term used for decomposers is:
- AQuaternary consumers
- BReducersCorrect
- CTransducers
- DMacroconsumers
2
The ten percent law for energy transfer through trophic levels was proposed by :
- ATansley
- BCharles Elton
- CRamdeoMisra
- DLindemannCorrect
3
Ecosystem follows:
- Aboth first and second laws of thermodynamicsCorrect
- Bonly first law of thermodynamics
- Conly second law of thermodynamics
- Donly third law of thermodynamics
4
Non-essential for an ecosystem is/are:
- AConsumersCorrect
- BDecomposers& producers
- CMinerals
- DProducers& consumers
5
There are only 4 or 5 trophic levels in food chain of an ecosystem due to :
- ALoss of energy at successive levelsCorrect
- BEnvironmental resistance
- CLimited number of members in biotic community
- DCarrying capacity
6
A detritus food chain will start with which of the following?
- ABacteria & fungi
- BProtozoans
- CEarthworm
- DRhizophora speciesCorrect
7
Stability will be provided to the ecosystem by:
- AFood chains
- BFood websCorrect
- CEcological pyramids
- DDecomposition
8
The graphical representation of population at various trophic levels in food chain is through:
- AAll the these
- Bpyramid of numbersCorrect
- Cpyramid of energy
- Dpyramid of biomass
9
Which of the following will be incorrect about concept of ecosystem?
- Aecosystems can also be classified as temporary and permanent
- Ball ecosystems are equal in sizeCorrect
- Cecosystem is an open unit
- Decosystem is a functional unit of nature
10
For greater efficiency a food chain must be:
- Alonger
- Bwithout transducers
- CshorterCorrect
- Dwithout microconsumers