ICSE Board
Class IX Biology
Paper – 1 Solution
SECTION-I
Answer 1
(a)
(i) Cell
(ii) HIV (Human immunodeficiency virus)
(iii) Mussel
(iv) Serum
(v) Fungi
(b)
(i) Carpel
(ii) Water
(iii) Apple
(iv) Hinge
(v) Cytology
(c)
(i)
Parasitic nutrition Saprophytic nutrition
Parasitic nutrition, is the mode of Saprophytic nutrition, is the mode of nutrition
nutrition in which the organisms in which the organisms depend on dead and
depend on a host for food and decaying organic matter.
eventually, harm the host.
(ii)
Centrosome Chromosome
Centrosome is located near the nucleus Chromosome is located inside the nucleus.
in the cytoplasm.
(iii)
Algae Fungi
Algae exhibit autotrophic nutrition. Fungi exhibit heterotrophic nutrition.
1
, (iv)
Respiration Photosynthesis
Products formed from respiration, are Products formed from photosynthesis, are
carbon dioxide and water. glucose and oxygen (as a byproduct).
(v)
Stomata Lenticels
Stomata bear bean shaped guard cells. Guard cells are absent in lenticels.
(d)
(i) Pollination - It is a process which involves the transfer of pollen grains from the
anther to the stigma of the same flower or different flowers of the same species.
(ii) Apocarpous gynoecium – The gynoecium which contains more than one carpel
which is free is called apocarpous gynoecium.
(iii) Incubation period – It is the period between the entry of germs and the
appearance of the first symptom of the disease.
(iv) Antibiotics – Antibiotics, are chemical substances produced by living organisms,
that kill or stop the growth of disease-causing micro-organisms such as fungi and
bacteria.
(v) Peristalsis – The rhythmic contraction and relaxation of muscles of the
oesophagus is called peristalsis.
(e)
(i) True.
(ii) False.
Correct Statement - In mammals, the neck contains seven vertebrae.
(iii) False.
Correct Statement - Melanin gives colour to the skin.
(iv) False.
Correct Statement - Fats are essential components of food. (They provide energy to
organisms.)
(v) False.
Correct Statement - Some bacteria are useful, while some are harmful to man.
(f)
Name of the disease Causative agent Preventive measure
1. Whooping cough Haemophilus pertussis DPT vaccine
2. Tetanus Clostridium tetani Immunisation
3. Malaria Plasmodium Destruction of mosquitoes
4. AIDS HIV virus Avoid sexual contact with
the infected person
5. Diphtheria Corynebacterium
2 diphtheriae DPT vaccine
Class IX Biology
Paper – 1 Solution
SECTION-I
Answer 1
(a)
(i) Cell
(ii) HIV (Human immunodeficiency virus)
(iii) Mussel
(iv) Serum
(v) Fungi
(b)
(i) Carpel
(ii) Water
(iii) Apple
(iv) Hinge
(v) Cytology
(c)
(i)
Parasitic nutrition Saprophytic nutrition
Parasitic nutrition, is the mode of Saprophytic nutrition, is the mode of nutrition
nutrition in which the organisms in which the organisms depend on dead and
depend on a host for food and decaying organic matter.
eventually, harm the host.
(ii)
Centrosome Chromosome
Centrosome is located near the nucleus Chromosome is located inside the nucleus.
in the cytoplasm.
(iii)
Algae Fungi
Algae exhibit autotrophic nutrition. Fungi exhibit heterotrophic nutrition.
1
, (iv)
Respiration Photosynthesis
Products formed from respiration, are Products formed from photosynthesis, are
carbon dioxide and water. glucose and oxygen (as a byproduct).
(v)
Stomata Lenticels
Stomata bear bean shaped guard cells. Guard cells are absent in lenticels.
(d)
(i) Pollination - It is a process which involves the transfer of pollen grains from the
anther to the stigma of the same flower or different flowers of the same species.
(ii) Apocarpous gynoecium – The gynoecium which contains more than one carpel
which is free is called apocarpous gynoecium.
(iii) Incubation period – It is the period between the entry of germs and the
appearance of the first symptom of the disease.
(iv) Antibiotics – Antibiotics, are chemical substances produced by living organisms,
that kill or stop the growth of disease-causing micro-organisms such as fungi and
bacteria.
(v) Peristalsis – The rhythmic contraction and relaxation of muscles of the
oesophagus is called peristalsis.
(e)
(i) True.
(ii) False.
Correct Statement - In mammals, the neck contains seven vertebrae.
(iii) False.
Correct Statement - Melanin gives colour to the skin.
(iv) False.
Correct Statement - Fats are essential components of food. (They provide energy to
organisms.)
(v) False.
Correct Statement - Some bacteria are useful, while some are harmful to man.
(f)
Name of the disease Causative agent Preventive measure
1. Whooping cough Haemophilus pertussis DPT vaccine
2. Tetanus Clostridium tetani Immunisation
3. Malaria Plasmodium Destruction of mosquitoes
4. AIDS HIV virus Avoid sexual contact with
the infected person
5. Diphtheria Corynebacterium
2 diphtheriae DPT vaccine
