Organisms and Populations PYQs
All NEET previous year questions from Organisms and Populations — with explanations.
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Which of the following statements are true with reference to the sex-determination in honeybees? A. An offspring formed from the union of a sperm and egg develops as a female (queen or worker). B. An unfertilized egg develops as a male by parthenogenesis. C. A male has half the number of chromosomes than that of a female. D. Males produce sperms by meiosis. E. Honeybees have a haplodiploid sex-determination system. Choose the correct answer from the options given below :
Which of the following equations depicts Verhulst-Pearl logistic population growth?
Which one of the following is an appropriate example of sexual deceit?
Choose the correct statements regarding population interactions between two species: A. In both parasitism and commensalism, only one species benefits and the other species is harmed. B. Both species benefit in mutualism. C. Both species benefit in commensalism. D. In parasitism, only one species benefits and the other species is harmed. E. In amensalism, one species is harmed and the other is unaffected.
In a growing population of a country:
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
Which of the following flowers only once in its life-time?
Niche is:
Natality refers to
A biologist studied the population of rats in a barn. Average natality was 250, mortality 240, immigration 20 and emigration 30. The net increase in population is
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A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is
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Cuscuta is an example of:
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Identify the likely organisms (a), (b), (c) and (d) in the food web shown below:
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Consider the following statements (A)-(D) each with one or two blanks. (A) Bears go into __(1)__ during winter to __(2)__ cold weather. (B) A conical age pyramid with a broad base represents __(3)__ human population. (C) A wasp pollinating a fig flower is an example of __(4)__. (D) An area with high levels of species richness is known as __(5)__. Which one of the following options gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?
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Differentiate between Habitat and Niche.
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Identify the type of population growth represented by Age-Sex pyramid (a).
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Identify the type of population growth represented by Age-Sex pyramid (b).
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Praying mantis is a good example of:
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The formula for exponential population growth is:
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Niche overlap indicates:
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Annual migration does not occur in the case of:
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