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NEET UG Neet B10 — practice questions

Explore 20 free Neet B10 questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Neet B10 questions and exercises with answers

Showing questions 1–20 of 20.

An age pyramid has a broad pre-reproductive base and narrows upward. Which population trend does it indicate?Read the answer and worked solution →In an age pyramid, the pre-reproductive group is smaller than the reproductive group. Which trend is indicated?Read the answer and worked solution →Which age-pyramid pattern represents a stable population?Read the answer and worked solution →For logistic growth, r = 0.2 per year, N = 400 and K = 1000. What is dN/dt in individuals per year?Read the answer and worked solution →Under logistic growth with constant positive r and K, at which population size is the total growth rate greatest?Read the answer and worked solution →Which is an abiotic component of a pond ecosystem?Read the answer and worked solution →Which pair represents an organism interacting with its abiotic environment?Read the answer and worked solution →A biosphere reserve may contain:Read the answer and worked solution →What is a key benefit of a national park?Read the answer and worked solution →What makes a sanctuary an in situ measure?Read the answer and worked solution →What information is recorded in a Red Data Book?Read the answer and worked solution →A species still survives but faces the danger of extinction. Which description applies?Read the answer and worked solution →Why can sacred groves act as refuges for rare plants?Read the answer and worked solution →Saving a forest to save tigers also protects:Read the answer and worked solution →Which benefit supports the broadly utilitarian argument for conserving biodiversity?Read the answer and worked solution →A wild plant supplies a compound used in a marketed medicine. Which conservation argument does this illustrate most directly?Read the answer and worked solution →Besides richness and endemism, hotspots show:Read the answer and worked solution →For S = CA^Z, Z = 0.5. If area increases fourfold with C unchanged, how does species richness change?Read the answer and worked solution →An exponentially growing population has N₀ = 200 and rt = ln 3. What is Nₜ?Read the answer and worked solution →In an interaction, both species have lower fitness in each other’s presence. Which sign pair and interaction fit?Read the answer and worked solution →

Worked practice questions

An age pyramid has a broad pre-reproductive base and narrows upward. Which population trend does it indicate?

  1. Expanding
  2. Stable
  3. Declining
  4. Already extinct
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Correct answer: A. Expanding

A broad base means many young individuals will enter reproductive ages. This is the expanding age-pyramid pattern.

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In an age pyramid, the pre-reproductive group is smaller than the reproductive group. Which trend is indicated?

  1. Rapid expansion
  2. Decline
  3. Unlimited exponential growth
  4. Immediate extinction
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Correct answer: B. Decline

A relatively narrow young-age base indicates fewer individuals entering reproduction. It is the declining pattern, not evidence that extinction has already occurred.

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Which age-pyramid pattern represents a stable population?

  1. A base much wider than all older groups
  2. No reproductive individuals
  3. Similar pre-reproductive and reproductive proportions
  4. Only post-reproductive individuals
Show answer and solution

Correct answer: C. Similar pre-reproductive and reproductive proportions

In the stable pattern, the pre-reproductive and reproductive portions are comparable. A very broad young base instead indicates expansion.

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom