Unit 3 Biodiversity Biology Notes Class 9, ix, ssc kpk Class 9th, Grade ix Ssc part-1 Solved Exercises, Solutions in PDF Format for Class 9 (IX) Pdf Downloads all KPK Boards Short questions, long questions, mcqs, and chapter overview.
Biodiversity Biology Notes Unit 3 pdf downloads free for kpk class 9th
Q (1): What is biodiversity? Write its importance.
Ans: Biodiversity: –
Meaning: –
The term biodiversity has been derived from two Greek words.
Bio means life.
Diversity means variety within a species or among a species.
Definition: –
The different kinds of organisms such as plants, animals and microorganisms present in different ecosystems of the world is called biodiversity.
Explanation: –
There are two million organisms which have been identified. Out of these two million 1.5 million are animals and 0.5 million are plants. In Pakistan there are about 60000 kinds of plants and 23,000 types of animals. Biologist estimated that today’s global biodiversity may consist of more than 100 million kinds of organisms. The biodiversity of an area depends on climate, altitude and composition of soils etc. Tropical regions of the earth have richer biodiversity while Polar Regions have fewer species.
Read more: Unit 2 Biology Notes
Importance of biodiversity: –
i. Food for human beings:
Biodiversity provides food for human in the form of different crops, fruits, meat, eggs and milk
etc.
ii. Production of drugs:
Biodiversity plays a vital role in human and animal’s health. A wide variety of plants, animals
and fungi are used as medicine and essential vitamins. Drugs such as streptomycin and
Erythromycin are derived from fungi drugs like caffeine, morphine and quinine are produced by
other plants.
iii. Industrial benefits of biodiversity:
Biodiversity plays an important role in the production of industrial materials. Building materials,
fibres, dyes, resins, gums, rubber and oil are some of the industrial materials derived from the
plants.
iv Relation with ecosystem;
Biodiversity play an important role in making and maintaining ecosystem. It is directly involved
in recycling of nutrients and providing fertile soil.
