UPSC 2012 › Environment & Ecology › Ecosystems & Ecology Concepts

3 questions · 2012 · answers as per the UPSC key

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UPSC 2012 · Q91 · Environment & Ecology › Ecosystems & Ecology Concepts · Save

Consider the following kinds of organisms :

  1. Bat
  2. Bee
  3. Bird

Which of the above is/are pollinating agent/agents?

(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3
UPSC 2012 · Q94 · Environment & Ecology › Ecosystems & Ecology Concepts · Save

The Millennium Ecosystem Assessment describes the following major categories of ecosystem services—provisioning, supporting, regulating, preserving and cultural. Which one of the following is supporting service?

(a) Production of food and water
(b) Control of climate and disease
(c) Nutrient cycling and crop pollination
(d) Maintenance of diversity
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Answer: (c) Nutrient cycling and crop pollination
UPSC 2012 · Q99 · Environment & Ecology › Ecosystems & Ecology Concepts · Save

What would happen if phytoplankton of an ocean is completely destroyed for some reason?

  1. The ocean as a carbon sink would be adversely affected.
  2. The food chains in the ocean would be adversely affected.
  3. The density of ocean water would drastically decrease.

Select the correct answer using the codes given below :

(a) 1 and 2 only
(b) 2 only
(c) 3 only
(d) 1, 2 and 3
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Answer: (a) 1 and 2 only