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Class 11 Biodiversity and Conservation worksheet
CBSE Social Science. Levels and roles of biodiversity, its loss, IUCN categories, conservation, hotspots and mega diversity centres. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The best estimate of the number of species on the earth is about:
- 1 billion
- 100 thousand
- 2 thousand
- 10 million
Answer
(d) 10 million
- 2.
What is meant by “ecosystem diversity”?
- the variety of ecosystem types and habitats
- species introduced from outside a habitat
- tropical countries holding much of the world’s species
- areas very rich in species and most vulnerable
Answer
(a) the variety of ecosystem types and habitats
- 3.
What are rare species?
- in danger of extinction
- species with a rising population
- species introduced from outside
- very small populations in limited areas
Answer
(d) very small populations in limited areas
Section B · short answer
- 4.
What is biodiversity?
Answer
The number and variety of plants, animals and micro-organisms in a region, their genes and the ecosystems they form.
- 5.
What is meant by each? (a) hotspots (b) agro-biodiversity
Answer
(a) areas very rich in species and most vulnerable (b) the diversity of crops
Section C · long answer
- 6.
Explain the ecological role of biodiversity.
Answer
Species capture and store energy, produce and decompose matter, cycle water and nutrients, fix gases and regulate climate; diverse ecosystems are more stable and productive.
Fresh sheets for your child
In the app, every Biodiversity and Conservation sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.