SECTION I (40 Marks)
(Compulsory: To be attempted by all questions)
Question 1
a) Name the following:
i) The gland which secrets insulin.
ii) The part of the brain which is concerned with memory.
iii) The biggest source of air pollution.
iv) An artery which carries deoxygenated blood.
v) Part of the human eye which controls the amount of light entering it. (5)
b) Fill in the blanks to represent relationship between structure and their special functional activity.
i) _______ and ultrafiltration (in kidney).
ii) Myelin sheath and ______
iii) spinal cord and ______
iv) Seminiferous tubules and ____
v) _____in the ear are concerned with controlling dynamic balance. (5)
c) Select one suitable word from the alternatives given to fill in the blanks :
i) The foetus draws its oxygen from the ___(amniotic fluid, placenta, umbilical cord)
ii) The condition of a cell when it cannot accommodate any more water is___(turgor pressure, turgid, flaccid)
iii) The blood vessel Which carries oxygenated blood to the heart is ____(aorta, pulmonary vein, pulmonary artery)
iv) The respiratory centre is located in the ____(cerebrum, hypothalamus, medulla oblongota)
v) Myopia can be corrected by ____'_(convex lens, concave lens, surgery). (5)
d) Study the diagram( BMT.1 Q-1) answer the questions that follow:
i) Will the level in the thistle funnel rise or fall?
ii) Give the reason to explain your answer.
iii) Name one place where this process occurs in the human body.
iv) What would happen if the above membrane was freely permeable. (5)
e) State one difference in each of the following pairs on the basis of what is indicated in brackets after each.
i) Cerebrum and cerebellum (function)
ii) corpus callosum and corpus luteum (location)
iii) Exosmosis and endosmosis (movement)
iv) Deplasmolysis and plasmolysis (function).
v) Artery and vein (system). (5)
f) Mention whether the following statements are true or false:
a) Presbyopia is generally an age related eye defect.
b) Root hair are the extensions of the outer epidermal cell of the root.
c) Deafness is caused due to the rapturing of the pinna.
d) oversecretion of thyroxin causes simple goitre.
e) A dicot leaf is isobilateral. (5)
g) State one main function of the following:
a) Ear ossicles
b) Iris
c) pituitary gland
d) platelets
e) Nasal chambers. (5)
h) Write the odd one out and give a reason for your answer.
a) Glycolysis, photosynthesis, photolysis, Carbon dioxide fixation.
b) spleen, thymus, pancreas, tonsil
c) cretinism, gignatism, goitre, beri-beri.
d) uterus, ureter, ovary, fallopian tube
e) myopia, hypermetropia, xeropthalmic, astigmatism. (5)
Section II (40 Marks)
(Answer any four questions)
Question 2
a) The following represents (BMT 1 Q-2) an experiment performed to demonstrate a particular aspect of photosynthesis. Study the diagram and answer the questions that follows:
i) what is the object of this experiment
ii) what is the chemical marked
iii) what will you observe when you text leaf Y with iodine solution
iv) name the process which is the reverse of photosynthesis in terms of the end products. (5)
b) Define the following:
i) Antibiotic.
ii) pollutant
c) plasmolysis
d) gestation
e) transpiration. (5)
Question 3
a) The figure (BM T 1Q3) represent the vertical section of a leaf.
i) Name the parts labelled 1 to 5
ii) what do the two arrows(dotted and solid) indicate in the day time and at night.
iii) how many leaf veins have been shown in this section (5)
b) i) mention any two harmful effects of noise pollution.
ii) What is the emblem (sign) of Family Planning and Family Welfare in India?
iii) Define demography. (5)
Question 4
a) Differentiate between the following pairs:
i) blood plasma/ serum
ii) neuron/nephron
iii) transpiration/guttation
iv) night blindness/colour blindness
v) photosynthesis/respiration. (5)
b) Given diagram (BMT1 Q4) of the external features of the heart:
i) Name the parts 1 to 7
ii) what happens if the coronary artery gets an internal clot
iii) mantion one structural difference between 5 and 4 (5)
Question 5
a) The diagram (BMT1 Q5) is intended to represent an experimental setup for demonstrating certain aspects of the air breathed out. The two valves C and D help to regulate the direction of the flow of air as represented by the arrows.
Answer the following questions:
i) There are serious mistakes at two places in the diagram. Redrew the diagram correctly to eliminate these mistakes
ii) what is the aim of the experiment
iii) name the liquid contained in the test tube A and liquid in test tube B.
iv) what would be the observations after performing the experiment. (5)
b) i) draw a diagram of the human excretory system and label the following:
Renal cortex, renal medulla, renal pelvis, ureter, urinary bladder and urethra.
ii) list the main constituents of normal human urine.
iii) name the blood vessels which enter and leave the kidney. (5)
Question 6
a) Diagram (BMT 1Q6) are different stages in the fertilisation of an egg.
i) Arrange the stage in the correct order as they would have taken place.
ii) in the female reproductive system where does this process takes place
iii) differentiate between identical and fraternal twins
iv) what is meant by colostrum? State its function. (5)
b) Give appropriate terms for the following:
i) providing readymade antibodies from outside for treating certain infectious diseases.
ii) The number of persons per square kilometre(km²) at any one given time.
iv) The onset of mensuration in a young girl at about the age of 13 years.
v) combination of smoke and fog. (5)
Question 7
Explain briefly the following statements:
a) Abnormally large numbers of WBC in the blood is usually an indication of some infection in our body. (2)
b) human blood circulation is called double circulatory system. (2)
c) veins have valves at intervals in their inner lining whereas the arteries do not have valves. (2)
d) most often only one embryo is formed at a time, although there are two ovaries in women. (2)
e) Insulin is injected into the body of a highly diabetic patients and not given orally. (2)
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