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- 1. Multiple Choice
In any food chain, the first trophic level is occupied by
Herbivores
Carnivores
Producers
Secondary consumers
- 2. Multiple Choice
Range of PAR wavelength is
200 - 400 nm
400 nm - 600 nm
600 nm - 800 nm
400 nm - 700 nm
- 3. Multiple Choice
It predicts
Mineralisation
Senescence
Leaching
10% law
- 4. Multiple Choice
In a pond ecosystem, the pyramid of biomass is always inverted in shape, because
The sunlight is more at bottom
The producers are at bottom
Primary consumers are absent
Secondary consumers are absent
- 5. Multiple Choice
An abiotic component of an ecosystem, required by plants to perform photosynthesis
sunlight
water
oxygen
soil
- 6. Multiple Choice
It is common in
Forest ecosystem
Pond ecosystem
Parasite ecosystem
Grassland ecosystem
- 7. Multiple Choice
Producers
Consumers
Omnivores
Dead organic matter
- 8. Multiple Choice
"Pyrmids of energy is always upright"
True
False
- 9. Multiple Choice
Diagram represents
Food chain
Food web
Decomposition stages
Pyramid of biomass
- 10. Multiple Choice
Identify a Sedimentary bio-geochemical cycle
Carbon cycle
Oxygen cycle
Nitrogen cycle
Sulphur cycle
- 11. Multiple Choice
Look at the diagram of the food web. The arrows means “eaten by.”
What will happen if the number of snakes goes down?
The owl will eat the grass
The number of frogs will go down
The hawk and owl will have less food
The number of mice and grasshoppers will go up.
- 12. Multiple Choice
Primary succession
Secondary succession
Psammosere
Allogenic succession
- 13. Multiple Choice
The transfer of energy from one organism to the next in an ecosystem begins with a producer. A producer is an organism that produces its own food. A consumer is an organism in a food chain that obtains energy from producers or other consumers; consumers may be herbivores or carnivores.
Which food chain correctly describes the flow of energy in an ecosystem?
grass → grasshopper → fish → human
grasshopper → fish → human
human → fish → grasshopper
human → grasshopper → fish → grass
- 14. Multiple Choice
This diagrammatic sketch showing
Phosphorous cycle
Carbon cycle
Oxygen cycle
Nitrogen cycle
- 15. Multiple Choice
Air is a biotic factor.
TRUE
FALSE
- 16. Multiple Choice
Pond is a ............
Lentic ecosystem
Lotic ecosystem
- 17. Multiple Choice
Chalmydomonas
Daphnia
Benthos
Humic acid
- 18. Multiple Choice
A succession in a freshwater ecosystem is
Psammosere
Hydrosere
Lithosere
Halosere
- 19. Multiple Choice
The Hydrosere succession has
6 stages
8 stages
7 stages
3 stages
- 20. Multiple Choice
In the given diagram, stage 2 and stage 5 represents
Forest stage & Shrub stage
Reed-swamp stage & Marsh meadow stage
Submerged plant stage & Marsh meadow stage
Shrub stag & Forest stage
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