Previous Year Paper year:2018 : ICSE-X-Biology

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ICSE-X-Biology

Previous Year Paper year:2018

with Solutions - page 3

#1-g-i
Name the type of pollution shown in the picture.
Ans : Air pollution

#1-g-ii
Name one source of this pollution.
Ans : Smoke from vehicles

#1-g-iii
How does this pollution affect human health?
Ans : Air pollution results in respiratory problems, lung disorders etc.

#1-g-iv
Write one measure to reduce this pollution.
Ans : (A) Use of unleaded petrol and of CNG.
(B) Switching off automobile engines at red lights and when not in use.

#1-g-v
State one gaseous compound that leads to the depletion of the ozone layer and
creates .ozone holes..
Ans : CFC.s (chlorofluorocarbons) released from refrigerators, aerosol-sprayers etc.

#1-h [5]
Choose the ODD one out from the following terms given and name the CATEGORY to
which the other belong:
Example: Nose, Tongue, Arm, Eye
Answer: Odd Term . Arm, Category . Sense organs

#1-i
Detergents, X-rays, sewage, oil spills
Ans : X-rays (Chemical pollutants)

#1-ii
Lumen, muscular tissue, connective tissue, pericardium
Ans : Lumen (All others are connective tissues)

#1-iii
Dendrites, medullary sheath, axon, spinal cord
Ans : Spinal cord (Parts of nerve cell)

#1-iv
Centrosome, cell wall, cell membrane, large vacuoles
Ans : Centrosome (Organelles in Plant cell)

#1-v
Prostate gland, Cowper.s gland, seminal vesicle, seminiferous tubules.
Ans : Seminiferous tubules (Others are Accessory glands in male reproductive system)

# [40]
Section : II
Attempt any four questions from this section.

#2

#2-a [5]
The diagram given below represents a stage during cell division.

Study the same and answer the questions that follow:

#2-a-i
Identify whether it is a plant cell or an animal cell.
Give a reason in support of your answer.
Ans : Animals cell. Because it lacks cell-wall.