Question 1

Five terms defined and explained in 25 words each

10 marks

Time to write
About 20 minutes
Topic
Scope of environmental studies and basic terms

Question

Question 1 · 10 marks

Define and explain each of the following in no more than 25 words: (5×2=10)

  1. The coral reefs
  2. Biomass
  3. Medicinal plants
  4. The Great Indian Bustard
  5. biosphere

Reworded from the university paper; the task is the same. The original paper belongs to the University of Delhi. See DU's question bank.

Before you write

Read off the question and its marks

20 minfor 10 marks

Read from the question

  • (5×2=10)5 items at 2 marks each: give each its share.
  • in no more than 25 wordsA word limit: keep each within 25 words.

Write it in this order

The parts stand alone: start with the one you are surest of.

  1. Read; underline the asks; jot your points 1 min
  2. 1 (i) Coral reefs 2 marks 4 min
  3. 2 (ii) Biomass 2 marks 4 min
  4. 3 (iii) Medicinal plants 2 marks 4 min
  5. 4 (iv) Great Indian Bustard 2 marks 3 min
  6. 5 (v) Biosphere 2 marks 3 min
  7. Check: every ask answered, key terms underlined 1 min

Short on time? A few lines on every part beat a full answer to one: each part is capped at its own marks.

Try it first. About 20 minutes for 10 marks. Write it out, then open the solution.

Solution

Hover or tap a marked figure, like 72,000, to see how it is made and where else it appears.

(i) The coral reefs: Species-rich marine ecosystems found in only a few shallow tropical seas; India's richest lie around Andaman and Nicobar and in the Gulf of Kutch.

(ii) Biomass: The mass of living organisms in a unit area at a given time (the standing crop), measured as fresh or dry weight.

(iii) Medicinal plants: Plants used as traditional medicines, many of them collected from forests, now also being investigated as possible sources of new modern drugs.

(iv) The Great Indian Bustard: A vanishing bird of Indian grasslands; overgrazing (more livestock than the grassland can support) and repeated fires degrade its habitat.

(v) Biosphere: The whole living part of the Earth, which many ecologists treat as one global ecosystem made up of all local ecosystems.

Where the 10 marks sit

#ComponentMarks
1(i) Coral reefs2
2(ii) Biomass2
3(iii) Medicinal plants2
4(iv) Great Indian Bustard2
5(v) Biosphere2
Total10
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