10th Biology Practice Questions – Page 11

Multiple Choice Questions :
1. Which lamp lasts 10,000 hours? ( )
A. ordinary bulb B. kerosene bulb C. compact fluorescent bulb D. tube light
2. The year of national policy for protection of forests ( )
A. 1985 B. 1987 C. 1995 D. 1997
3. A new environment policy was drafted in ( )
A. 2000 B. 2004 C. 2006 D. 2007
4. Environment- friendly fuel ( )
A. Kerosene B. petrol C. compressed natural gas D. diesel
5. This is renewable energy ( )
A. Moon B. Sun C. Petrol D. Uranium
ANSWERS: 1)C 2)A 3)B 4)C 5)B

Fill in the Blanks :
1. C.N.G ——-
2. ——- is colourless, odourless and lighter than air.
3. In India ——- is the only city where vehicles are using CNG.
4. A policy declaration was made for the abatement of pollution in the year ——-
5. ——- movement was started against the selfish businessman who resorted to deforestation.
6. ——- means having a variety of plants or animals in a particular place.
7. Optimum use of resources for our needs is called ——-
8. ——- said that , “Nature gives us resources to meet our needs, but not our greed.”
ANSWERS: 1. Compressed natural gas 2. Compressed natural gas 3. Delhi
4. 1992 5. Chipko 6. Biodiversity 7. resource management 8. Gandhi

Match the Following :
Group-A Group-B
1. Green house gases( ) A.Uttaranchal
2. Soil pollution ( ) B. CO2 , methane etc
3. Air pollution ( ) C. Loss of fertility
4. CFC’S ( ) D. Burning of wood, plastic
5. Chipko movement ( ) E. Jet planes F. Water
ANSWERS: 1)B 2)C 3)D 4)E 5)A

Group-A Group-B
1. Eco-friendly fuel ( ) A. Earthquake
2. Tsunami ( ) B. Decibels
3. Noise pollution ( ) C. CNG
4. Ozone ( ) D. Acid rains
5. Natural calamity ( ) E. O3 F. Giant tidal waves
ANSWERS: 1)C 2)F 3)B 4)E 5)A

Multiple Choice Questions :
1. ——- of the earth is covered by water. ( )
A. 1/4 B. 3/4 C. 1/2 D. none
2. Excess fluorine in drinking water causes ( )
A. Anaemia B. Sterility C. Rickets D. Skeletal degradation
3. The % of salt content in sea water ( )
A. 1.8% B. 2.7% C. 3.5% D. 4.5%
4. ——- is the Nitrogen fixing bacteria ( )
A. Typhi bacteria B. Bordetella C. Azospirilum D. None
5. The term Biotechnology was used by ( )
A. Aristotle B. Linnaeus C. Hekel D. Karl Ericke
6. Forests that are growing near the sea water are called ( )
A. Mangroves B. Grasslands C. Social forests D. All
7. Corals are found in ——— ( )
A. ponds B. seas C. lakes D. rivers
8. ——- is a completely vanished bird ( )
A. Blue-jay B. Dodo C. Parrot D. Sparrow
9. The instrument used for measuring rainfall is ( )
A. Rain-gauge B. Seismograph C. Hydrometer D. None
10. ——- act as carbon sinks. ( )
A. Rivers B. Houses C. Seas D. Grasslands
11. The most ancient among the plants and animals is ( )
A. Crocodile B. Coral reefs C. Snails D. Tortoise
12. These are called the lungs of our urban areas ( )
A. dams B. temples C. buildings D. parks
ANSWERS: 1)B 2)D 3)C 4)C 5)D 6)A 7)B 8)B 9)A 10)D 11)B 12)D

Fill in the Blanks :
1. Ground water, rainfall, moisture and snow form our ——- environment.
2. ——- are the huge and ancient water systems.
3. Andhra Pradesh is called ——-
4. ——- stands first in the forefront in the production of food products.
5. The ——- worship the forests as their mother.
6. Zoos and botanical gardens are ——- protection areas.
7. The groups which are formed for protection of the forests are
called ——-
8. ——- is the instrument by which rainfall is measured.
9. The ground water level can be increased by allowing the rainwater falling off the roofs can be diverted to seep into ——-
10. National parks and sanctuaries are ——- protection areas.
11. Wild life act was passed in the year ——-
12. ——- scientist used the term Bio-technology for the first time in 1919.
13. The process by which compost is produced with the help of Earthworms is called ——-
14. Antibiotics are produced from ——-
15. Growing trees along with agriculture in the farm is called ——-
ANSWERS: 1.Water 2.oceans 3.granary of the south 4.cuba 5.tribals 6.Ex-situ 7.vana samrakshana samithis 8.Rain gauge 9.recharge
structure 10.in situ 11.1972 12.Karl Ericke 13.vermi compost 14.Actinomycetes bacteria and fungus 15.Agro forestry

Match the Following :
Group-A Group-B
1. Carbon sinks ( ) A. Watershed
2. Fertile soil ( ) B. Grasslands
3. Sea shore forests( ) C. Mangroves
4. Reduce air and noise pollution ( ) D. Water from terrace
5. Recharge pit ( ) E. Parks F. Humus and sand
ANSWERS: 1)B 2)F 3)C 4)E 5)D

Match the following :
Group-A Group-B
1. Bacillus thruingiensis ( ) A. Cuba
2. Corals ( ) B. Alkaline soil
3. Oil and Natural gas ( ) C. fish meat
4. Proteins ( ) D. Calcium carbonate
5. Litmus paper turns blue ( ) E. Rocky layers of the bottom of The sea F. Acidic soil
ANSWERS: 1)A 2)D 3)E 4)C 5)B

Essay Type Questions (4 Marks)
Q. Write a brief account on axon.
A. 1. Axon is defined as one of the main parts of neuron. It is a long fibre arising from one corner of the cyton. Each neuron
possesses only one axon.
2. Axons are very long and are usually unbranched structures. The axon is generally called as nerve fibre.
3. The central cavity of the tubular axon is filled with axoplasm.
4. It is covered by a thin plasma membrane called axo lemma, Nissil granules are present in axon.
5. The terminal branches of axon are called telodendrites or nerve terminals.
6. Each of these nerve terminal makes contact with the dendrites or cell body or even axons of another neuron.
7. Axons covered by thin myelin sheath are called medullated fibres. Others without the sheath are the non medullated fibres.
8. The sheath prevents the leakage of impulses and transmits them at a faster rate.
9. Some of the axons also make contact with the cells in the effector organs such as muscles or glands. This site is called a
synapse.

Q. Give an account of various types of nerves found in human body.
A. Several thousands of nerve fibres are enclosed in a connective tissue sheath. This is called as a nerve. There are three types of
nerves in human body. They are motor, sensory, and mixed nerves.
1. Efferent nerves: the nerves that carry impulse from brain or spinal cord to effector organs are called Efferent nerves (efferent- out going).
2. Motor nerves: Stimulation of motor nerves makes the muscles to contract. These are also responsible for the movement of hands and legs. All these receptors are associated with the nervous system.
3. Sensory nerves: These nerves carry information from sense organs or receptors to brain and spinal cord. They are also called as afferent nerves.
4. Mixed nerves: Mixed nerves are provided with both sensory and motor nerve fibres.
Q. Describe the nerve cell with the help of a neat diagram.
A. 1. The chief components of any neuron are the cell body (Cyton), the axon and the dendrites.
2. Cell body or perikaryon or cyton has a large nucleus with one or two nucleali.
3. Nissil granules are present in the cytoplasm. These are groups of
ribosomes.
4. Dendrites are projections arising from the cell body. They receive information from other neurons.
5. Each neuron has one axon. The cytoplasm of axon is covered by
plasma membrane. At the end of axon nerve terminals are present.
6. Some neuron axons are covered by myelin sheath. The myelin sheath leaves small gaps called nodes of Ranvier.
7. The nerve terminals make contact with the dendrites or cytons of other neurons.
Q. What is a nerve impulse?
A. When a stimulus is applied to the neuron, a small electrical potential (Current) about 0.055 volts to 55 milli volts is generated. This is produced at the junction between axon and cell
body. This electrical potential is called action potential. This is commonly called as nerve impulse.
This potential travels all along the length of the axon until it reaches the nerve terminal. From here, the impulse is transferred to another neuron or to an effector organ.
Q. Describe the structure of cerebrum.
A. 1. Cerebrum is the forebrain. It is the largest part of brain.
2. A deep groove in the middle of the cerebrum divides it into two equal halves. Each half is called as cerebral hemisphere.
3. Right and left cerebral hemispheres are connected to each other by a budle of axons.
4. The outer portion of cerebral hemisphere is grey in colour and is called cerebral cortex.
5. There are several ridges called Gyri and the grooves called Sulci.
6. They increase the surface area of the cortex in order to accommodate more number of neurons.
7. Three very deep grooves present across each cerebral hemisphere divides it into four lobes- Frontal, Parietal, Temporal and
Occipital lobes.
Q. What are the functions of cerebrum?
A. 1. Cerebrum controls body functions and regulates voluntary activities.
2. Left cerebral hemisphere controls the right side of the body and right hemisphere regulates the left side of the body functions.
3. It is the seat of intelligence, thinking, judgement remembrance.
4. It receives, analyses and stores the information. It is retrieved whenever needed.
5. It can even generate impulse.
6. It has the visual (sight), auditory (hearing) affactory (smell) centres and has the capacity to associate itself with several
functions.

Tenth Biology Important Questions

10th Biology Important Questions for AP Students