Multiple Choice Questions

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Match column I with column II and select the correct option from the codes given below.

Column I Column II
A. Commensalism  (i) One inhibited, other unaffected
B. Parasitism  (ii) One benefitted, other unaffected
C. Mutualism (iii) Both are benefitted
D. Amensalism  (iv) One benefitted, other harmed

  • A - (iv), B - (ii), C- (iii), D - (i)

  • A - (iii), B - (iv), C - (ii), D - (i)

  • A - (ii), B - (iv), C - (iii), D - (i)

  • A - (ii), B - (iv), C - (i), D - (iii)


C.

A - (ii), B - (iv), C - (iii), D - (i)

Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.

Parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm and is adapted structurally to this way of life.

Mutualism is the way two organisms of different species exist in a relationship in which each individual fitness benefits from the activity of the other.

Amensalism is any relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected.


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The water logging capacity of garden soil will be determined by measuring the weight of

  • soil by adding water and humus

  • water saturated soil then heating the soil till it is dry and then measuring the weight of soil

  • soil by adding water, biomass and humus

  • soil from different locations with biomass.


The 10% energy transfer law of food chain was given by

  • Stanley

  • Weismann

  • Lindemann

  • Tansley


Enzyme and carbohydrates dominate in the digestive tract of

  • carnivores

  • omnivores

  • parasites

  • herbivores


Increase in toxic concentration from one trophic level to another trophic level is called

  • ecological toxification

  • bio- magnification

  • bioconcentration

  • cytological effect


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When a natural predator (living being) is applied on the other pathogen organism to control them, this process is called

  • biological control

  • genetic engineering

  • artificial control

  • confusion technique


Which of the following workers are related as ecologist, palaeobotanist and embryologist respectively?

  • B. Salmi, R. Mishra, P. Maheshwari

  • R Mishra, B. Sahni, P. Maheshwari

  • B. Sahni, P. Maheshwari, R Mishra

  • P. Maheshwari, R Mishra, B. Sahni


The part of earth in which life exist is known as

  • Lithosphere

  • Biosphere

  • Atmosphere

  • Hydrosphere


Which of the following is used as bioinsecticide?

  • Bacillus polymyxa

  • Cylindrospermum licheniforme

  • Phytophthora palmivora

  • Chrysanthemum cinerarifolium


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In terrestrial ecosystem such as forest, maximum energy is found in which trophic level

  • T1

  • T2

  • T3

  • T4


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