Ecosystems (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 12 - 16 of 28

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Question number: 12

» Ecosystems » Ecological Succession

Appeared in Year: 2011

MCQ▾

Question

The process of invasion completed through the following stages- (June NET Paper-2)

Choices

Choice (4) Response

a.

Migration, Ecesis and aggregation

b.

Ecesis and aggregation

c.

Migration, aggregation and settlement of species

d.

Migration and establishment of species in bare area

Question number: 13

» Ecosystems » Population

Appeared in Year: 2015

MCQ▾

Question

As the population growth rate increases the doubling time: (June)

Choices

Choice (4) Response

a.

Remain constant

b.

Double

c.

Decrease

d.

Increase

Question number: 14

» Ecosystems » Parasitism, Prey - Predator Relationships

Appeared in Year: 2015

MCQ▾

Question

Parasites in a population/community can:

(I) Influence host population cycles

(II) Change ecological communities

(III) Change community structure

Choose the correct answer: (June)

Choices

Choice (4) Response

a.

(I), (II) and (III)

b.

(II) and (III) only

c.

(III) only

d.

(I) only

Question number: 15

» Ecosystems » Ecosystem Types and Diversity

Appeared in Year: 2015

MCQ▾

Question

Maximum density shows a marked pattern as one move from equator to the poles. Species diversity (June)

Choices

Choice (4) Response

a.

Is highest in the arctic and Antarctic regions

b.

Decreases as one moves from equator to poles

c.

Increases as one moves towards the poles from the equator

d.

Remains constant as one move from equator to poles

Question number: 16

» Ecosystems » Parasitism, Prey - Predator Relationships

Appeared in Year: 2015

Match List-Ⅰ List-Ⅱ▾

Question

Match the List – I with List – II. Identify the correct answer from the codes given below the lists: (June)
List-Ⅰ (Organism) List-Ⅱ (Interaction)

(A)

Lichens

(i)

Commensalism

(B)

Barnacles and whales

(ii)

Ammensalism

(C)

Penicillium and Staphylococcus

(iii)

Parasitism

(D)

Albugo and Indian mustard

(iv)

Symbiosis

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (iv)
  • (i)
  • (ii)
  • (iii)

c.

  • (i)
  • (iv)
  • (ii)
  • (iii)

d.

  • (iii)
  • (iv)
  • (ii)
  • (i)

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