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Organisms and Populations · Question 22

NEET (UG) 2022MCQEasy📈 Topic in 100% papers+4−1
1

Which one of the following statements cannot be connected to Predation?

  1. It helps in maintaining species diversity in a community
  2. It might lead to extinction of a species
  3. Both the interacting species are negatively impacted
  4. It is necessitated by nature to maintain the ecological balance

Answer

(3) Both the interacting species are negatively impacted

Solution

Predation is a (+, −) interaction: the predator benefits and only the prey is harmed.

∵ Predators keep prey populations under control, they help in maintaining species diversity in a community (statement 1 is true).

∵ A predator introduced into a new area (e.g. without natural checks) can wipe out its prey, predation might lead to extinction of a species (statement 2 is true).

As per NCERT, predation is nature's way of transferring energy fixed by plants to higher trophic levels and of keeping prey populations in check, i.e. it maintains ecological balance (statement 4 is true).

∴ "Both the interacting species are negatively impacted" describes competition, not predation.

Answer: (3)

NEET (UG) 2022

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2

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (−) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (−) for another species involved in the interaction?

  1. Predation
  2. Amensalism
  3. Commensalism
  4. Competition
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3

If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is individuals per Drosophila per week.

  1. 0.1
  2. 10
  3. 1.0
  4. zero
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4

Two butterfly species are competing for the same nectar of a flower in a garden. To survive and coexist together, they may avoid competition in the same garden by :

  1. Predating on each other
  2. Feeding at the same time
  3. Choosing different foraging patterns
  4. Increasing time spent on attacking each other
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5

In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

  1. Predation
  2. Resource partitioning
  3. Competitive release
  4. Mutualism
NEET (UG) 2021
6

Amensalism can be represented as :

  1. Species A (+); Species B (0)
  2. Species A (-); Species B (0)
  3. Species A (+); Species B (+)
  4. Species A (-); Species B (-)
NEET (UG) 2021
7

In the exponential growth equation Nt = N0ert, e represents

  1. The base of geometric logarithms
  2. The base of number logarithms
  3. The base of exponential logarithms
  4. The base of natural logarithms
NEET (UG) 2021
8

Match List-I with List-II Choose the correct answer from the options given below.

  1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
  2. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
  3. (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
  4. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
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9

In the light of the above statements, choose the correct answer from the options given below

  1. (A) is false but (R) is true
  2. Both (A) and (R) are true and (R) is the correct explanation of (A)
  3. Both (A) and (R) are true but (R) is not the correct explanation of (A)
  4. (A) is true but (R) is false
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10

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their

  1. Nutritive value
  2. Growth response
  3. Effect on reproduction
  4. Defence action
NEET (UG) 2020
11

Which of the following is not an attribute of a population?

  1. Natality
  2. Sex ratio
  3. Mortality
  4. Species interaction
NEET (UG) 2020

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
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