What is the main source of energy for all ecosystems on earth?
[C] Deep sea hydro-thermal system [D] Moon
PAR (Photo synthetically active radiation) from incident solar radiation is:
[C] 70% [D] 20%
Plant capture how much of PAR?
[C] 50% [D] 30%
Which law is obeyed during energy flow in an ecosystem?
[A] First law of thermodynamics
[B] Second law of thermodynamics
[C] Third law of thermodynamics [D] Both (a) and (b)
In a terrestrial ecosystem major producers are:
(B) Woody plant
[A] A and B only
[B] A and C only
[C] A, B and C [D] B only
Primary producers in aquatic ecosystem are:
[C] Higher plant [D] All of these
Which of these is a primary consumer?
[C] Man [D] Tiger
Which of these is a common herbivores in aquatic ecosystem?
[C] Mammals [D] Mollusc
Which of the following represent simple GFC (Grazing Food Chain)?
[A] Grass —>Goat —> Man
[B] Goat —> Grass —> Man
[C] Detritus —> Fungi —> Man [D] Fungi —> Detritus —> Grass
DFC (Detritus Food Chain) begins with:
[A] Dead organic matter
[C] Bacteria [D] Plant
Main decomposers are:
[A] Bacteria and fungus
[C] Flagellated, Protozoans [D] Flagellated diatoms
Decomposers meet their energy and nutrient requirements by:
[C] Detritus [D] Bacteria
GFC is a major conduit for energy flow in:
[A] Terrestrial ecosystem
[B] Aquatic ecosystem
[C] Both (a) and (b) [D] None of the above
[A] Intracellular digestion
[B] Extra cellular digestion
[C] Both intra and extracellular digestion [D] No digestion at all
Find the incorrect statement.
[A] In terrestrial ecosystem larger fraction of energy flow occurs through DFC.
[B] In aquatic ecosystem a major conduit for energy flow is GFC.
[C] Detritus food chain is not at all connected with grazing food chain at any level. [D] Natural interconnection of food chain makes it a food web.