NCERT Botany Ecology Organisms,Popution Online mock tests,MCQs,pdf

Ecology Organism and Population Mock Test-9

Question No:1

Following is true about predators

[A] They keep prey population under control
[B] They may help in maintaining species diversity hi a community by reducing the intensity of competition among competing prey species
[C] They are prudent in nature
[D] All of above



Question No:2

Which butterfly is highly distasteful to its predator bird because of a specific chemical present in its body?.

[A] Apis mellifera
[B] Viceroy
[C] Monarch
[D] Apis indica



Question No:3

Who propose competitive exclusion principle?

[A] Cause
[B] Robert May
[C] Darwin
[D] Von Humbolt



Question No:4

Abingdon tortoise in Galapagos Islands became extinct within a decade after ______ were introduced on the island, because of the greater browsing efficiency of introduced animal,

[A] Cows
[B] Buffalows
[C] Goats
[D] Camels



Question No:5

A species whose distribution is restricted to a small geographical area because of the presence of a competitive superior species is found to expand its distributional range dramatically when the competing species is experimentally removed. This phenomenon is known as

[A] Competitive exclusion
[B] Competitive release
[C] Interference competition
[D] Resource partitioning



Question No:6

Who showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to behavioural differences in their forging activities?

[A] Connell
[B] Me Arthur
[C] Gause
[D] Darwin



Question No:7

In general, which of the following appears to be more adversely affected by competition?

[A] Herbivores
[B] Plants
[C] Carnivores
[D] Both (a) and (b)



Question No:8

Gause’s competitive exclusion principle states that

[A] Two unrelated species competing for the same resources cannot co-exist indefinitely and competitively inferior one will eliminated eventually
[B] Two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will eliminated eventually
[C] Two unrelated species competing for the same resources can co-exist indefinitely and can grow together
[D] Two closely related species competing for the same resources can co-exist indefinitely and can grow together



Question No:9

Cornell’s elegant field experiments showed that on rocky sea coasts of Scotland, the larger & competitively superior barnacle ______ dominates the intertidal area, and exclude smaller barnacle ______ from that zone

[A] Chathamalus, Balanus
[B] Balanus, Balanus
[C] Chathamalus, chhathamalus
[D] Balanus, Chathamalus



Question No:10

According to Darwin which competition is a potent force in organic evolution?

[A] Inter-specific
[B] Intra-specific
[C] Both (a) and (b)
[D] None of these



Question No:11

In some shallow South American lakes, which of the following compete for the same food that is zooplanktons of lake?

[A] Visiting flamingoes
[B] Resident fishes
[C] Both (a) and (b)
[D] None of these



Question No:12

Find out true statement

[A] Totally unrelated species could also compete for the same resources
[B] Resources need not to be limiting for competition to occur
[C] In interference competition, feed efficiency of one species might be reduced due to the interfering and inhibitory presence of the other species, even if resources are abundant
[D] All are true



Question No:13

Which of the following are adaptations of parasite?

[A] Loss of unnecessary sense organ
[B] Loss of digestive system
[C] High reproductive capacity
[D] All of these



Question No:14

Liver fluke belongs to class

[A] Cestoda
[B] Trematoda
[C] Hirudeneria
[D] Turbelleria



Question No:15

Liver fluke complete its cycle in how many intermediate hosts?

[A] 1
[B] 2
[C] 3
[D] 4