Short Answer TypeState whether the following actions are ‘voluntary action, simple reflex or
conditioned reflex:
1) Blinking
2) Cleaning the table
3) Playing on the keyboard
4)Salivating when food is put in the mouth
Long Answer TypeGiven below is an apparatus used to study a particular process in plants. Study the same and answer the questions which follow:
(i) Name the apparatus.
(ii) Mention one limitation of this apparatus.
(iii)Which phenomenon is studied with the help of this apparatus?
(iv)What is the function of the part marked ‘Reservoir’?
(v) What is the role of the air bubble in the experiment?Given below is the diagram of the human ear. Study the same and answer the questions which follow:
(i) Give the biological term for the part labelled ‘A’ and state its function.
(ii) Name the part labelled ‘B’ and state its function.
(iii)Name the part labelled ‘C’ and state its function.
(iv)Give the function of ear wax.Given below is an experiment, set up by a candidate, to study the process of respiration in plants. The candidate failed to get the expected result as two mistakes were made while setting up the experiment.
(i) Identify and state the two mistakes made by the candidate.
(ii) What is the role of soda lime in the experiment?
(iii)What is the purpose of using lime water in flasks ‘A’ and ‘B’?
(iv)Give the chemical equation to represent the process of respiration.i) The tube carrying air in flask A is not dipped into the solution of lime water.
The limb of the air pump in flask B is not dipped into the solution of lime water.
(ii) Soda lime absorbs CO2 present in the incoming air.
(iii)The purpose of using lime water in flask A:
The incoming air is passed through soda lime, which absorbs CO2 from it. The lime
water in flask A thus does not turn milky, which gives the indication of CO2 being
completely absorbed by the soda lime. Thus, CO2-free air is supplied to the plant.
The purpose of using lime water in flask B:
As the air passes into flask B, the reaction of lime water with CO2 turns it milky
which indicates that CO2 is produced by the plant during the experiment.
(iv)
(i) Draw a neat and well-labelled diagram of the chloroplast.
(ii) List the events taking place in the photo-chemical phase of photosynthesis.
(iii)If you are planning an experiment to show the effect of light on photosynthesis:
1) Will you select white light or green light? Justify your answer.
2) Why would you select a destarched plant?Given below is a diagrammatic representation of a defect of the human eye.
(i) Identify the defect.
(ii) Mention two reasons for the above defect.
(iii)State how the defect can be rectified.
(iv)Name the part of the eye responsible for maintaining the shape of the eyeball.Name the hormones which lead to the following conditions:
(i) Diabetes mellitus
(ii) Growth of beard in women
(iii)Myxoedema
(iv)Gigantism
(v) Exophthalmic goitreStudy the diagram given below and then answer the questions which follow:
(i) Name the parts labelled 1 and 2. State the function of each part.
(ii) State any one function of amniotic fluid.
(iii)What is the role of the umbilical cord in the development of the foetus?
(iv)Name the part in the diagram which is endocrine in nature.
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