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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, and you get your all-India rank on every one. Nothing on the site is on sale right now.

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.