Ecosystem Pattern And Components Test
Ecosystem Pattern And Components
This is online test 03 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
The metabolic process which causes a reduction in gross primary production:
- ArespirationCorrect
- Btransportation
- Cexcretion
- Ddigestion
2
Due to changing conditions of sunlight and temperature, the productivity :
- Aremains the same
- Bdecreases from poles to tropics
- Cincreases from polar areas to tropicsCorrect
- Dincreases from tropics to polar regions
3
An ecological pyramid cannot exhibit:
- AFood chains present in that ecosystem
- BEcological parameters
- CStructure of trophic levels
- DSame species belonging to two or more trophic levels.Correct
4
Marine biomes are affected very less by:
- Atemperature
- Bgeographical locationCorrect
- Csalinity
- Dtype of sea floor
5
If 20000J energy is present in transducers then 3°consumers will get:
- A2000J
- B10000J
- C200J
- D20JCorrect
6
The agroecosystems :
- Aare stable and never cause pollution
- Bhave the capacity of self-regulation
- Care natural ecosystems
- Ddo not have diversityCorrect
7
Zone of ocean present below 2000 meters and lacks any tranducers is :
- Aaphotic zone
- Babyssal zoneCorrect
- Ceuphotic zone
- Dcoastal zone
8
The food chain of hydrothermal vents present in deep oceans, begins with :
- Adetritivores
- Bphotoautotrophs
- Cparasites
- DchemoautotrophsCorrect
9
Coral reefs in aquatic ecosystem hold the same position as held by:
- Amediterranian scrub forests in terrestrial ecosystem
- Btropical deciduous forests in terrestrial ecosystem
- Cnorthern coniferous forests in terrestrial ecosystem
- Dtropical rainforests in terrestrial ecosystemCorrect
10
If the number of producers in a pond ecosystem is approx 10 million then the number of top carnivore (in million) which it can support may be:
- A2Correct
- B50
- C20
- D11