Select the incorrect statementA. Organisms living in oceans , lakes and rivers do not face any water related problemsB. Productivity and distribution of plants is dependent on waterC. The levels of thermal tolerance of different species determine to a large extent their geographical distributionD. Foraging , reproductive and migratory activities of some animals are dependent on seasonal variation in light.

Select the incorrect statementA. Organisms living in oceans , lakes an

1.	Select the incorrect statementA. Organisms living in oceans , lakes and rivers do not face any water related problemsB. Productivity and distribution of plants is dependent on waterC. The levels of thermal tolerance of different species determine to a large extent their geographical distributionD. Foraging , reproductive and migratory activities of some animals are dependent on seasonal variation in light.
Answer» Correct Answer - A

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Define the following terms and give one example for each: (a) Commensalism (b) Parasitism (c) Camouflage (d) Mutualism (e) Interspecific competition
Select the statement which explains best parasitism. (a) One organism is benefited. (b) Both the organisms are benefited. (c) One organism is benefited, other is not affected. (d) One organism is benefited, other is affected.
Which statements are true? (a) One is benefitted and other unaffected in mutualism. (b) Both partners are benefitted in commensalism. (c ) One kills and feeds on another in predation.(d) Both partners are benefitted in symbiosis.A. a and b onlyB. a and c onlyC. b and c onlyD. c and d only
Assertion Commensalism is a type of positive interaction. Reason In commensalism, one organism is benefitted, while other is harmed.A. If both Assertion and Reason are true and the Reason is the correct explanation of AssertionB. If both the Assertion and Reason are true, but the Reason is not the correct explanation of AssertionC. If Assertion is true, but the Reason is falseD. If Assertion is false, but the Reason is true
Select the statement which best explains commensalism (a) One organism is benefitted (b) Both the organisms are benefitted (c) One organism is benefitted , other is not affected (d) One organism is benefitted , other is affected .
Each environment can support a limited population depending upon itsA. Biotic potentialB. Carrying capacityC. NatalityD. Reproductive potential
The per individual change in a population due to natality can be estimated by using (Here, `DeltaN_(n))` =New individuals , N=initial populations , `Deltat`=change in time)A. `(Ndeltat)/(DeltaN_(n))`B. `(NDeltaN_(n))/(t)`C. `(DeltaN_(n)Deltat)/(N)`D. `(DeltaN_(n))/(N Deltat)`
In an area, if there are 200 Parthenium plants but only a single huge banyan tree with a large canopy, the population density is measured in terms ofA. Number or biomassB. Number of per cent coverC. Biomass or per cent coverD. Number, biomass or per cent cover.
One species is benefitted and other is neutral. This association is calledA. MutualismB. CommensalismC. AmensalismD. Parasitism
The size of a population for any species is not a static parameter. It keeps changing in time, depending on various factors includingA. Food availabilityB. Predation pressureC. Adverse weatherD. All of the above

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