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Q. No.

All the following are symbiotic relations except:
1. monarch butterflies and viceroy butterflies
2. lichens
3. mycorrhizae
4. tapeworms and humans

Subtopic:  Population Interactions: Predation |

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The adaptation that a prey species avoid being detected by a predator would be:
1. Mullerian mimicry
2. Batesian mimicry
3. aposematic coloration
4. cryptic coloration

Subtopic:  Population Interactions: Predation |
 69%
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An apex predator feeding on five different species is experimentally removed. The expected effect on the area will be:

1.  An increase in the number of all the five species
2.  A decrease in the biodiversity
3.  One of the five species becomes the apex predator
4.  All five species die
Subtopic:  Population Interactions: Predation |

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The chemical defence produced by plants against herbivory are:

1.primary metabolites2.secondary metabolites
3.cofactors4.pollens

Subtopic:  Population Interactions: Predation |
 87%

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Consider the given two statements:

I:  Parasitoidism is the strategy that is closer to predation than parasitism.
II:  Parasitoids feed on a living host which they eventually kill, typically before it can produce offspring
 
1.  Both I and II are correct and II explains I.
2.  Both I and II are correct but II does not explain I.
3.  I is correct and II is incorrect.
4.  Both I and II are incorrect.

Subtopic:  Population Interactions: Predation | Population Interactions: Parasitism |
 51%

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A species that has a disproportionately large effect on its natural environment relative to its abundance is called as:

1.keystone species2.niche
3.competitor4.predator

Subtopic:  Population Interactions: Predation |
 84%

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Identify the correct statements about symbiotic relationships:

I:  in a parasitic relationship, one organism is harmed and the other is benefited.
II:  coevolution is a feature of many symbiotic relationships.
III:  a relationship that appears to be commensalism may in fact be mutualistic or parasitic.
IV:  the most efficient type of parasite is one that kills its host.
 
1. I, II and III only 2. I, III and IV only
3. II, III and IV only 4. I, II, III and IV
Subtopic:  Population Interactions: Predation | Population Interactions: Parasitism | Population Interactions: Coevolution |
 59%

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Consider the following statements:

I:  When certain exotic species are introduced into a geographical area, they become invasive because the invaded land does not have its natural predators.
II:  Competition is best defined as a process in which the fitness of one species is significantly lower in the presence of another species.
III:   Biological control methods adopted in agricultural pest control are based on the ability of the predator to regulate the prey population.

Which of the above statements are true?

1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
Subtopic:  Population Interactions: Competition | Population Interactions: Predation |
 82%
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Consider the two statements:

I:  Predators in nature are ‘prudent’.
II:  Prey species have evolved defenses to lessen the impact of predation.
 
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. Only I is correct.
4. Both I and II are incorrect.
Subtopic:  Population Interactions: Predation |
 68%
From NCERT

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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Milkweeds are particularly favoured as their food by most herbivores.
Reason (R): Milkweeds produce cardiac glycosides that are very good for the heart of herbivores.
In the light of the above statements, choose the most appropriate answer from the options given below :
1.  Both (A) and (R) are true and (R) is the correct explanation of (A).
2.  Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.  (A) is true but (R) is false.
4.  Both (A) and (R) are false.
  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Population Interactions: Predation |
 63%

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