Population Interactions

IMPORTANT

Population Interactions: Overview

This Topic covers sub-topics such as Parasitism, Commensalism, Mutualism, Predation, Ectoparasite, Brood Parasitism, Endoparasite, Parasitoid, Hyperparasitism, Population Interactions, Positive Interactions and, Negative Interactions

Important Questions on Population Interactions

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In brood parasitism:

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Certain species of wasps are seen to frequently visit flowering fig trees. The interaction between them is:

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The egrets always forage close to where the cattle are grazing. The interaction between them can be called:

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Which of the following interactions play a key role in keeping an eye on the number of the population?

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Find the correct match of the organisms with the interaction they exhibit:

(a) Cuscuta growing on a shoe flower plant                              i)Brood Parasitism

(b) Mycorrhizae living on the roots higher plants.                     ii)Commensalism

  (c) Clownfish living among the tentacles of a sea anemone.   iii)Mutualism

(d) Koel laying her eggs in the crow’s nest.                                iv)Parasitism                                                             

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Obligate parasites live on

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The graph below shows the changes in two populations of herbivores in a grassy field. A possible reason for these changes is that
 

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Which one of the following is a matching pair of certain organism(s) and the kind of association between them?

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The symbiotic relationship of algae and fungus is found in

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Match the following pairs of interacting species to the corresponding names of interaction:

  Name of interacting species   Name of Interaction
i Herbivore and Plants a Mutualism
ii Cuckoo and Crow b Predation
iii Sea anemone and Clown fish c Parasitism
iv Fungus and Cyanobacteria (Lichen) d Commensalism

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Are epiphytes parasite?

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Match List I with List II: 

List I

(Interacting species)

List II

(Name of Interaction)

A. A Leopard and a Lion in a forest/grassland I. Competition
B. A Cuckoo laying egg in a Crow's nest II. Brood parasitism
C. Fungi and root of a higher plant in Mycorrhizae III. Mutualism
D. A cattle egret and a Cattle in a field IV. Commensalism

Choose the correct answer from the options given below: 

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Match List I with List II: 

List I

(Interaction)

List II

(Species A and B)

A. Mutualism  I.  +(A), 0(B)
B. Commensalism II. -(A), 0(B)
C. Amensalism III. +(A), -(B)
D. Parasitism IV. +(A), +(B)

Choose the correct answer from the options given below: 

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IMPORTANT

If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interactions, then how many of the following is/are representing '+' and '-' interaction?

A. Orchid growing on a mango branch.

B. Sea anemone and clown fish.

C. Lichens.

D. Sparrow eating any seed.

E. Cuscuta on hedge plant.

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Cuscuta is an example of

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Match the columns and find out the correct combination:

  Column I   Column II
A Predation 1 Cuscuta and hedge plant
B Commensalism 2 Balanus and Chathamalus
C Parasitism 3 Cactus and moth
D Competition 4 Orchid and mango

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Mention examples of ectoparasites on some fishes.

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What is ectoparasite?

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Which of the following interspecific interaction is represented by +, 0?

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In an interaction among species A and species B, species A can show camouflage, chemical or morphological defence against species B. Species A is most likely to be: