Sample Paper – 2009
Class – X
Subject – BIOLOGY
- Name any two excretory products in plants.1
- What name has been given to those organisms which break down the complex organic matter present in dead animals and plants? Give an example of such an organism.1
- How do variations occur in the asexually reproducing organisms?1
- Why do birds and mammals have four chambered hearts?2
- Write any two points of differences between respiration in plants and respiration in animals.2
- Mention four ways by which we can achieve development and conservation of environment simultaneously.2
- Write the functions of salivary glands and pancreas in the process of digestion in our body.2
8. How does speciation occurs? [ Mention any three ways in which a new species originates from already existing ones.]3
9. A) Define biomagnification.
B) Paper can be recycled and is biodegradable also. Which option would you choose to get rid of waste paper? Why? 3
10. A) Draw a labeled diagram of human brain and label the following parts on it:
a) hypothalamus b) cerebellum c) Cerebrum d) Medulla.
B) Write any two functions of auxins in the plants.
OR
A) Draw a neat and well labeled diagram of L.S. of carpel showing germination of pollen.
B) Name one unisexual and bisexual flower.
C).What happens to the petals , sepals, stamens, stigma and style after fertilization? 5
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