ICSE Class 10 Organisms and Populations — Mock Test

Free online mock test for Organisms and Populations (ICSE Class 10 Botany) — 89 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.The relationship between a fig tree and its specific pollinator wasp species, where the wasp pollinates the fig and uses developing seeds to nourish its larvae, is an example of:
   • A.Mutualism
   • B.Parasitism
   • C.Predation
   • D.Commensalism
2. 2.In the logistic equation dN/dt = rN[(K - N)/K], what happens to the growth rate dN/dt when the population density N becomes equal to the carrying capacity K?
   • A.It becomes zero because the term (K - N)/K equals zero
   • B.It becomes maximum because (K - N)/K equals one
   • C.It becomes negative and the population keeps falling
   • D.It becomes infinite
3. 3.All of the following can be used as a measure of population density EXCEPT:
   • A.Total number of individuals
   • B.Percent cover or biomass
   • C.Relative density such as number of fish caught per trap
   • D.The intrinsic rate of natural increase (r)
4. 4.Assertion (A): Under unlimited resource conditions, a population grows exponentially and produces a J-shaped curve when N is plotted against time. Reason (R): The carrying capacity (K) of the habitat limits the population to an asymptote.
   • A.Both A and R are true and R is the correct explanation of A
   • B.Both A and R are true but R is NOT the correct explanation of A
   • C.A is true but R is false
   • D.A is false but R is true
5. 5.Allen's Rule, an adaptation to cold climates, states that mammals from colder regions tend to have:
   • A.Shorter ears and limbs to minimise heat loss
   • B.Longer ears and limbs to maximise heat loss
   • C.Thinner subcutaneous fat
   • D.Larger body surface area