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#Question id: 9188


Which of the following are examples or parts of plantsʹ systemic acquired resistance against infection?

#Section 2: Evolution
  1. phytoalexins
  2. salicylic acid
  3. alarm hormones
  4. A, B, and C

Answer:- Option(s): 4


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#Question id: 11360

#Section 1: Ecology

Which of the following can contribute to the numerical response of a predator?

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#Question id: 11361

#Section 1: Ecology

Which of the following tends to stabilize predator-prey relationships?

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#Question id: 11362

#Section 1: Ecology

Within a trophic level, this term refers to groups of species that feed on similar resources and often have similar ways of life.

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#Question id: 11363

#Section 1: Ecology

Competition among individuals belonging to the same species is referred to as _________ competition.

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#Question id: 12109

#Section 1: Ecology

Niches of two coexisting species of pond snail of the same genus are likely to be similar, but not identical, because of which of the following?
I. Closely related species use similar resources.
II. Competitive interactions exist between these species. 
III.  Unlimited resources are available.

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#Question id: 12110

#Section 1: Ecology

Which of the following has the smallest biomass?

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