Multiple Choice QuestionsA food web is more realistic than food chain for showing the feeding relationship in an ecosystem because
it compares the number of consumers to the number of microorganisms in an ecosystem
food chains use only a small sampling of organisms
a food web explains why there are more producers than consumers
producers are usually eaten by many different consumers and most consumers are eaten by more than one predator
The organisms that thrives on the remains of dead plants and animals are categorised as
carnivore
omnivore
scavangers
predators
C.
scavangers
Scavangers and decomposers are the group of organisms which depends upon the dead remains of both plants and animals. Decomposer brokedown complex organic substances to simple inorganic substances. Omnivores feeds both plants and animals. Carnivores are the animal which eats other animals.
Which of the following is false?
The energy content in a trophic level is determined by considering individuals of a species in that trophic level
The succession that occur in newly cooled lava is called primary success
Rate of succession is faster in secondary succession
Quantity of biomass in a trophic level at a particular period is called as stop-(standing) crop
Ratio between mortality and natality is called
population ratio
vital index
census ratio
density coefficient
Grassland with scattered trees is :
savanna
deciduous forest
evergreen forest
tropical rain forest
As insecticides reach at higher trophic level in food chain their concentration :
increases
become irregular
remain constant
decreases
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