1(a)Name the following
(i)The cavity in the body in which the
human lungs are located .
(ii) The soluble protein present in
blood plasma responsible for clotting.
(iii)The parts of the female reproductive
system where fertilisation takes place.
(iv)The organisation that provides help and
relief to victims of flood.
(v)The process by which leucocytes engulf and
(vi) Respiratory openings found on stems and
removal of water in the form of droplets at the tip of the leaves.
(vii)plants that prepare their own food from
basic raw materials.
Ans. 1 (a)
iii) Fallopian tube
vi) Lenticles and guttation respectively
the following statements (i) to (vi) by choosing the correct alternative
from those given brackets:
(i) The protective covering of lungs is the (pericardium, pleura,
(ii) Bacteria found in the nodules of leguminous plants are (saprophytic,parasitic,
symbiotic)in nature .
(iii)The gaseous pollutant which causes acid rain is (carbon monoxide,
Carbon dioxide, Nitrogen dioxide).
(iv) The valve present between the left atrium and the left ventricle is
the (tricuspid valve, bicuspid valve, semiluar valve).
(v) The blood vessel supplying blood to the kidney is the (renal ) vein,
renal artery, dorsal aorta).
(vi) which of the following is an insecticide? (Phenol, DDT, carbolic
i) The protective covering of lungs is the pleura .
ii) Bacteria found in the nodules of leguminous plants are symbiotic in
iii) The gaseous pollutant which causes acid-rain is Nitrogen dioxide .
iv) The value between the left atrium and left ventricle is the bicuspid
v) The blood vessel supplying blood to the kidney is the renal vein .
vi) D.D.T. is an insecticide .
(i) State whether the following statements are True or False:
1.Deafness is caused due to the rupturing of the pinna.
2.Penicillin obtained from Penicillium notatum is an antibody
3.The percentage of oxygen in ins pired air is 16.4.
4.cells that have lost their water content are said to be
5.Photosynhesis result in loss of the dry weight of the plant .
6.Xylem is the water conducting tissue in plants .
(ii) Rewrite the false statement
from 1 to 6 above in their correct form by changing the first or the
last word only .
Complete the following table by filling in the blank space numbered1 to 6:
||Filled with sap .mostly
||Produces male gametes in
|Grana of chloroplastl
||Transfers urine outside
1. It is the place where most distinct image is formed .
2. Vacuole .
3. Semi niferous tubules .
4. Helps in the transport of gases .
5. A staked form of thylakoid.
1 (e) Given below is the
diagram of the Human Ear. Study the same and then answer the question that
(i) what role does the ear drum play in hearing ?
(ii) What common term is given to the parts labeled A, B and E?
(iii) Would there be any difference if these three parts mentioned in 'ii'
above were replaced by one big one? Why?
(iv) Give the biological term for the parts mentioned in 'iv' above.
(vi) State the functions of the ear.
i) Ear drum vibrates with the sound waves frequently .
ii) Ear ossicles .
iii) Yes, these three structures can be replaced by a big structure known
as Ear ossicles . And there will be no difference because ear ossicles
transmits the vibrations to internal ear .
iv) Part-C: Semicircular canals
v) Perilymph .
vi) Ear plays a very important role in hearing. Semi-circular canals,
utricle and saccule of membranous labyrinth are the structures of
Q 1(f) Given
below is a simple diagram of the human kidney cut open longitudinally .
Answer the following questions :
1. Give the definition of excretion .
2. Name the units of kidney .
3. Why does the cortex of the kidney show a 'dotted' appearance ?
4. Mention two functions of the kidney .
5. Write two differences in the composition of the blood flowing through
blood vessels A and B.
1. Excretion :- It is actually the
removal of wastes especially nitrogenous wastes from the body
3. Because it contains numerous complex structures known as Nephrons .
4. Kidney removes excess of water from body . Kidney removes nitrogenous
wastes like urea , urine etc. from the body .
5. A is Renal vein . It carries deoxygenated blood .
B is Renal artery . It carries oxygenated blood .