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NEET · Biology · Class 12

Organisms and Populations — NEET Biology MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

Which feature is an attribute of a population rather than a single organism?
  1. Birth rate ✓
  2. Birth
  3. Death
  4. Body mass
Answer: A. Populations possess statistical attributes such as natality, mortality, sex ratio and age distribution that cannot meaningfully describe one individual.
Why not B: An individual can undergo birth, but a per-capita birth rate describes a population.
Why not C: An individual dies; mortality rate is the population attribute.
Why not D: Body mass can be measured for an individual.
Why can percent cover be more informative than individual count for a banyan population?
  1. Cover measures birth rate directly
  2. A banyan is invisible during counting
  3. One large-canopied tree can exert a much greater community influence than its count suggests ✓
  4. Counts can be used solely for animals
Answer: C. Population density need not be expressed as number. Biomass or cover better represents ecological abundance when individuals differ greatly in size.
Why not A: Cover estimates occupied area, not natality.
Why not B: The difficulty is ecological representation, not visibility.
Why not D: Counts are often suitable for plants as well as animals.
Two populations have the same initial N, but population X has r=0.12 and Y has r=0.02 under unlimited resources. Which conclusion follows from Nt=N0e^(rt)?
  1. X increases faster because its larger positive r gives greater multiplication during that interval ✓
  2. Y reaches a larger size because a lower r always means higher fitness
  3. Both remain equal because initial size determines future density completely
  4. Neither can grow until K is specified
Answer: A. Intrinsic increase determines the proportional pace of growth. Equal starting populations diverge rapidly when their positive r values differ.
Why not B: Under these conditions, higher positive r produces faster increase.
Why not C: The growth multiplier depends on r as well as initial size and time.
Why not D: K is absent from the unlimited-resource equation.

These are 3 of the 30 questions in the test. Take the full chapter test →

Read the chapter first

Every NCERT question in this chapter is solved, free: NCERT solutions — Organisms and Populations →

Other NEET Biology chapters

The Living WorldBiological ClassificationPlant KingdomAnimal KingdomMorphology of Flowering PlantsAnatomy of Flowering Plants

All 32 chapters →

Questions

How many NEET questions are there on Organisms and Populations?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET Biology chapter test free?

Yes. Every chapter test is free with no login. The only paid thing on the site is the full-length 90-question Biology mock and its all-India rank.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.