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NEET UG Organisms and Populations — practice questions — page 3

Explore 97 free Organisms and Populations questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Organisms and Populations questions and exercises with answers

Showing questions 61–90 of 97.

Population ecology is important because it links ecology toRead the answer and worked solution →Individuals of a population who leave the habitat for elsewhere make upRead the answer and worked solution →A population has Nt = 100, B = 20, I = 5, D = 10 and E = 5. What is Nt+1?Read the answer and worked solution →Per capita birth rate is 0.3 and death rate is 0.1. What is r in dN/dt = rN?Read the answer and worked solution →The intrinsic rate of natural increase of the flour beetle isRead the answer and worked solution →In 1981, the r value for India's human population wasRead the answer and worked solution →The integral form of the exponential growth equation isRead the answer and worked solution →In logistic growth, the final phase when density reaches carrying capacity isRead the answer and worked solution →Why is the logistic model considered more realistic than the exponential?Read the answer and worked solution →Reproductive fitness with a high r value is also calledRead the answer and worked solution →Which organisms produce a large number of small-sized offspring?Read the answer and worked solution →One species is harmed while the other is unaffected. This interaction isRead the answer and worked solution →Predation, parasitism and commensalism share which feature?Read the answer and worked solution →A sparrow eating seeds is, ecologically, an example ofRead the answer and worked solution →Removing Pisaster made over 10 prey species vanish. Why?Read the answer and worked solution →Pisaster starfish are key predators inRead the answer and worked solution →Prudent predators avoid overexploiting prey because it wouldRead the answer and worked solution →Roughly what share of all insects are phytophagous?Read the answer and worked solution →Cattle and goats avoid browsing Calotropis because it producesRead the answer and worked solution →Nicotine, caffeine and quinine are made by plants mainly asRead the answer and worked solution →In shallow South American lakes, flamingoes and resident fishes compete forRead the answer and worked solution →The Abingdon tortoise of the Galapagos became extinct after the arrival ofRead the answer and worked solution →A species expands its range when a superior competitor is removed. This isRead the answer and worked solution →In general, which are more adversely affected by competition?Read the answer and worked solution →MacArthur's five warblers on one tree coexisted because ofRead the answer and worked solution →Host-specific parasites and their hosts tend toRead the answer and worked solution →Which is a typical adaptation of parasites?Read the answer and worked solution →The human liver fluke uses which two intermediate hosts?Read the answer and worked solution →Many marine fish are infested with which ectoparasites?Read the answer and worked solution →Endoparasites typically showRead the answer and worked solution →

Worked practice questions

Population ecology is important because it links ecology to

  1. Biochemistry and cytology
  2. Taxonomy and systematics
  3. Physiology and anatomy
  4. Genetics and evolution
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Correct answer: D. Genetics and evolution

Natural selection acts on populations, so studying them connects ecology with population genetics and evolution.

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Individuals of a population who leave the habitat for elsewhere make up

  1. Immigration
  2. Emigration
  3. Natality
  4. Mortality
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Correct answer: B. Emigration

Emigration counts members that leave the habitat during the period, lowering density.

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A population has Nt = 100, B = 20, I = 5, D = 10 and E = 5. What is Nt+1?

  1. 90
  2. 120
  3. 125
  4. 110
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Correct answer: D. 110

Nt+1 = 100 + (20 + 5) - (10 + 5) = 110.

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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