NEET-UG Biology · Class 12
Population attributes and age pyramids — NEET & JEE Questions
Population attributes and age pyramids is a topic in Organisms and Populations, a Class 12 Biology chapter of the NEET-UG syllabus. TestBudy holds 16 published NEET-UG questions on Population attributes and age pyramids, each with the marking scheme of the real paper. The ideas it examines include Estimating density without counting every individual, Births, deaths, immigration and emigration balance, Reading expanding, stable and declining age pyramids.
- questions
- 16
- shown here
- 10
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Key formulas and concepts
The ideas Population attributes and age pyramids is examined on, as they are tagged in the syllabus tree.
- Estimating density without counting every individual
- Births, deaths, immigration and emigration balance
- Reading expanding, stable and declining age pyramids
Population attributes and age pyramids MCQs with solutions
10 of the 16 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
A diagram showing proportions of pre-reproductive, reproductive and post-reproductive individuals:
- A. biomass pyramid
- B. age pyramid
- C. food pyramid
- D. energy pyramid
Loss of individuals from a population through death:
- A. immigration
- B. mortality
- C. natality
- D. mutualism
The number of individuals per unit area or volume:
- A. age structure
- B. death rate
- C. birth rate
- D. population density
The per-capita or population-level addition of new individuals through births:
- A. emigration
- B. natality
- C. mortality
- D. competition
Which population attribute cannot meaningfully be assigned to a single individual?
- A. Age
- B. Body mass
- C. Body temperature
- D. Birth rate
Which of the following is a population attribute rather than an attribute of an individual organism?
- A. Birth rate
- B. Body mass
- C. Eye colour
- D. Blood group
An age pyramid with a broad base and progressively narrower upper age classes usually indicates
- A. an expanding population
- B. a declining population
- C. a population with no births
- D. a population containing only old individuals
Match List I with List II. List I List II (A) Logistic growth (I) Unlimited resource availability condition (B) Exponential growth (II) Limited resource availability condition (C) Expanding age pyramid (III) The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups (D) Stable age pyramid (IV) The percent individuals of pre-reproductive and reproductive age group are same Choose the correct answer from the options given below:
- A. A-II, B-III, C-I, D-IV
- B. A-II, B-IV, C-I, D-III
- C. A-II, B-IV, C-III, D-I
- D. A-II, B-I, C-III, D-IV
An age pyramid has a broad base with many pre-reproductive individuals and progressively fewer older individuals. What does this most strongly suggest?
- A. A declining population
- B. An expanding population
- C. A population with no births
- D. A population with identical numbers in all age classes
When will the population density increase, under special conditions? When the number of :
- A. Deaths exceeds number of births and also number of emigrants equals number of immigrants.
- B. Births plus number of immigrants equals number of deaths plus number of emigrants.
- C. Births plus number of emigrants is more than the number of deaths plus number of immigrants.
- D. Births plus number of immigrants is more than the sum of number of deaths and number of emigrants.
Common mistakes in Population attributes and age pyramids
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Considers only birth rate and ignores migration and mortality.
- Assumes any large adult cohort implies future expansion.
- Reports the total number of births instead of dividing by population size.
- Classifies age pyramids using total population size rather than relative age-class proportions.
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