Previous Year Paper year:2016 : ICSE-X-Biology

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ICSE-X-Biology

Previous Year Paper year:2016

with Solutions - page 5

#3-a-v
Name the gland that secretes the .emergency hormone..
Ans : Adrenal medulla (part of Adrenal gland.)

#3-b [5]
The diagram of an given below demonstrates a particular process in plants.
Study the same and answer the questions that follow :

#3-b-i
Name the apparatus.
Ans : Ganong's potometer

#3-b-ii
Which phenomenon is demonstrated by this apparatus?
Ans : Transpiration

#3-b-iii
Explain the phenomenon mentioned in (ii) above.
Ans : The process in which water is given out in the form of vapour through the aerial parts of the plant.

#3-b-iv
State two limitations of using this apparatus.
Ans : 1. The small twig can not remain alive for a long time.
2. Introducing a single air bubble is practically very difficult.

#3-b-v
What is the importance of the air bubble in the experiment?
Ans : The movement of the air bubble shows the amount of water transpired by the twig in a given time.

#3-b-vi
Name the structures in a plant through which the above process takes
place.
Ans : 1. Cuticle 2. Stomata 3. Lenticel

#4

#4-a [5]

#4-a-i
Draw a well labelled diagram of the membranous labyrinth found in the
inner car.
Ans :

#4-a-ii
Based on the diagram drawn above in (i) give a suitable term for each of
the following descriptions :
1. The sensory cells that helps in hearing.
2. The part that is responsible for static balance of the body.
3. The membrane covered opening that connects the middle car to the
inner car.
4. The fluid present in the middle chamber of cochlea.
5. The structure that maintains dynamic equilibrium of the body.
Ans : 1. Organ of corte 2. Utriculus and sacculus 3. Oval window 4. Endolymph 5. Semicircular canals

#4-b [5]
Give the Biological/technical term for the following:

#4-b-i
Complete stoppage of menstrual cycle in females.
Ans : Menopause

#4-b-ii
Pigment providing colour to urine.
Ans : Urochrome