Biology Questions Answers

1. Among the biotic components of the ecosystem, the producer system is ?

1. Sea
2. Rivers
3. Green Plants
4. Animals

2. Which of has following group of gases contribute to the 'Green House Effect' ?

1. Carbon tetrafluoride and Nitrous oxide
2. Carbon monoxide and Sulphur dioxide
3. Ammonia and Ozone
4. Carbon dioxide and Methane

3. Which one of the following disease is not transmitted by tiger mosquitoes ?

1. Dengue
2. Chikungunya
3. Japanese Encephalitis
4. Yellow fever

4. Which one of the following air pollution can affect blood stream leading to death ?

1. Cadmium
2. Asbestos dust
3. Carbon monodioxide
4. Lead

5. What is Pollination ?

1. germination of pollen grains
2. growth of pollen tube in ovule
3. transfer of pollen from anther to stigma
4. visiting flowers by insects

6. Plants receive their nutrients mainly from ?

1. atmosphere
2. chlorophyll
3. light
4. soil

7. What is movement of cell against concentration gradient is called

1. osmosis
2. active transport
3. diffusion
4. passive transport

8. The disease caused by deficiency of protein in children is called

1. Pellagra
2. Marasmus
3. Beri-Beri
4. Rickets

9. Bamboo is classified as

1. Bush
2. Tree
3. Grass
4. Weed

10. Photosynthesis generally takes place in which parts of the plant?

1. Steam and leaf
2. Leaf and other chloroplast bearing plants
3. Bark and leaf
4. Roots and chloroplast bearing plants