 1. Name the respiratory organs
of (a) Fish (b) Mosquito (c) Earthworm (d) Dogs
Answer: (1) gills (2) Trachea (3) Skin (4) lungs
2. Although bile juice has no
digestive enzyme. It is still considered to be very important for digestion
of food .Give two reasons.
Answer: (1) Bile juice helps in
to emulsify fat. (2) Due to basic nature it neutralizes the acidic traces
reaching the small intestine.
3. What is osmoregulation? How
does it takes place in human beings ?
Answer: Balance the water &
salt level in body is called osmoregulation. It takes place nephron by the
ADH (anti diuretic hormone). It effects the permeability of cells of
nephron for absorption of water.
4. Define phototropism. Which
hormone is responsible for it . How?
Answer: The growth movement of plants induced by
stimulus of light is called phototropism.
Auxins hormone is responsible
for it.High amount of Auxins is present in shady or dark half region of
shoot apex which causes high growth & turns the plant towards light
source.
5. Mention the name of secretory
part / gland and function of following hormones.-
(a)
Insulin (b) Progesterone ( c )Oxytocin
Answer: (1) Insulin –beta cells
of pancreas, control sugar level
(2) Progesterone – carpus leutium of
ovary, maintains pregency & fixes the embryo to uterus wall.
(3)Oxytocin –Pitiutary gland, milk
secretion, birth hormone
6. A person has lost his control
over muscular activities.
a) What can be the possible cause?
b) What would you advice the person
to overcome the problem?
c) Which value is inculcated?
Answer: (a)Cerbellum control is lost due to
taking of excess of alcohol (b)
Advice – Not to take alcohol (c)
Value- concern for human life
7. Lymph is another type of
fluid involved in transportation. Justify the statement by two reason.
Answer: 1. It drains tissue
fluid from the extra cellular space back into blood.
2.
it takes lymphocytes and antibodies from the lymph nodes to the blood.
3. Some of the fluid from digestive
tract is absorbed in the lymph and store the fluid temporarily.
8. List any two strategies used
by plants for excretion.
Answer: a. Transpiration b. Bark formation c. Stomata (gas exchange)
9. What are the different ways
in which glucose is oxidized to provide energy in various organisms?
Answer:
Glucose (in cytoplasm)--> Energy+Pyruvate------->
(i) Absence of
O2(yeast)->C2H5OH+ CO2+Energy
(ii) Lack of O2(muscle cells)-> Lactic acid + Energy
(iii) Presence of
O2(mito.)->CO2+ H2O+ Energy
10. Which animal or plant
hormone is associated with the following
1. Change at puberty in
boys 2.Goitre
3.Inhibits growth of plants 4.promotes cell
division
5. Increased sugar level in
blood 6.Dwarfism
Answer: .(i)Testosterone (ii)
Thyroxine (iii)Abscissic acid (iv) Cytokinin (v)Insulin(vi) growth hormone
For More paper Visit : BIOLOGY CLASS 10
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