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In any food chain, the first trophic level is occupied by
Range of PAR wavelength is
200 - 400 nm
400 nm - 600 nm
600 nm - 800 nm
400 nm - 700 nm
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
An abiotic component of an ecosystem, required by plants to perform photosynthesis
It is common in
Dead organic matter
"Pyrmids of energy is always upright"
Pyramid of biomass
Identify a Sedimentary bio-geochemical cycle
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.
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
This diagrammatic sketch showing
Air is a biotic factor.
Pond is a ............
A succession in a freshwater ecosystem is
The Hydrosere succession has
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