Question 1

Question 1(i)A plant hormone related with inhibition of senescence isAuxinsGACytokininsABA

Accepted Answer

GAReason — GA help in growth, initiate germination, breaks seed dormancy and inhibits senescence.

Question 2

Question 1(vi)Assertion (A): Application of ethylene phytohormone induces fruit ripening.Reason (R): Ethylene is the only hormone which is a gas at ordinary temperature.Both A and R are trueBoth A and R are falseA is true and R is falseA is false and R is true

Accepted Answer

Both A and R are trueReason — Ethylene is a gaseous plant hormone that induces fruit ripening.

Question 3

Question 1(viii)Ram went for his driving test. He has to answer many questions regarding this. He was able to give correct answers to all the questions, but was not able to read the numbers given in coloured circles. This was due tocolour blindnessmyopiahypermetropiaastigmatism

Accepted Answer

colour blindnessReason — Colour blindness is a condition in which some people by birth cannot discriminate between certain colours such as red and green. This is due to a genetic defect.

Question 4

Question 1(ix)Which layer of eyeball is richly supplied with blood vessels for providing nourishment to the organ?Sclerotic layerChoroidRetinaCornea

Accepted Answer

ChoroidReason — Choroid layer of eyeball is richly supplied with blood vessels for providing nourishment to it.

Question 5

Question 1(xi)The passage of white blood corpuscles through unruptured wall of blood vessels is known asdiapedesishaemopoiesisphagocytosiscyclosis

Accepted Answer

diapedesisReason — During any injury or infection the WBCs pass through the wall of blood vessel to reach the site of infection to fight bacteria. This process is referred to as diapedesis.

Question 6

Question 1(xii)The rate of comparison of transpiration from both surfaces of a dorsiventral leaf is measured usingGanong's potometerDarwin's potometerGarreau's potometerFarmer's potometer

Accepted Answer

Garreau's potometerReason — Garreau's potometer helps to compare the rate of transpiration from upper and lower surfaces of leaf.

Question 7

Question 1(xiv)The average ratio of male to female individuals based on XX and XY type of sex-determination, in a human population is3:11:31:41:1

Accepted Answer

1:1Reason — XX and XY are equal giving a ratio 1:1.

Question 8

Question 1(xv)Harish was crossing the road when he suddenly slipped on a banana peel and fell on the road. After some time the inflamed region developed redness, swelling, pain with increased local heat.Which of the following is/are involved in the process mentioned above?(a) Leucocytes(b) Erythrocytes(c) Plasma(d) LymphOnly aOnly a and cOnly a, c and dOnly a, b and c

Accepted Answer

Only aReason — Inflammation occurs due to the reaction of tissues to injury and to localized invasion of germs. Here the leucocytes migrate through the walls of the blood vessels through diapedesis and fight against the disease causing germs.

Question 9

Question 2(iii)Fill in the blanks with suitable words.The inner ear or (a) ............... has two main parts (b) ............... and (c) ............... . The cochlea is (d) ............... and looks like a (e) ............... .

Accepted Answer

The inner ear or (a) membranous labyrinth has two main parts (b) cochlea and (c) semicircular canals . The cochlea is (d) spiral-shaped and looks like a (e) snail shell.

Question 10

Question 2(iv)Choose the odd one out from the following terms and name the category to which others belong(a) Axon, Myelin sheath, Schwann cells, Synapse(b) Seed shapes, Seed colour, Flower position, Inflorescence.(c) Hypertension, Diarrhoea, Deafness, Irritation.(d) Insulin, Glucagon, Thyroxine, Pepsin.(e) Cretinism, Myxoedema, Goitre, Scurvy.

Accepted Answer

(a) Odd one: SynapseCategory: Others are parts of a nerve cell.(b) Odd one: InflorescenceCategory: Others are traits studied by Mendel(c) Odd one: DiarrhoeaCategory: Others are effects of noise pollution.(d) Odd one: PepsinCategory: Others are hormones secreted by endocrine glands.(e) Odd one: ScurvyCategory: Others are hormonal disorders

Question 11

Question 2(v)Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairsColumn IColumn IIJunction between neuronEarsLuteal phaseSynapseAuditory nerveCranial meningesProtective covering of brainProgesteroneOccipital lobeVisual perception Testosterone Neurotransmitters

Accepted Answer

Column IColumn IIJunction between neuronSynapseLuteal phaseProgesteroneAuditory nerveEarsProtective covering of brainCranial meningesOccipital lobeVisual perception

Question 12

Question 3(ii)Define tropic movement.

Accepted Answer

Growth movements occurring in response to unidirectional external stimuli in a plant part are called tropic movements.

Question 13

Question 3(iii)Mention two functions of abscisic acid.

Accepted Answer

Two functions of abscisic acid (ABA) are:It accelerates senescence (ageing) and abscission of leaves.It is a growth inhibitor and slows down the plant metabolism.

Question 14

Question 3(iv)What are the differences between menarche and menopause?

Accepted Answer

Differences between menarche and menopause are:MenarcheMenopauseIt is the onset of menstruation in a young female at about the age of 13 years.It is the permanent stoppage of menstruation in females at about the age of 45 years.It indicates beginning of reproductive age.It indicates ending of reproductive age.

Question 15

Question 3(v)Draw a neat and labelled diagram showing the vertical section of a leaf.

Accepted Answer

Below labelled diagram shows the vertical section of a leaf:

Question 16

Question 4(ii)Differentiate between diastole and systole of cardiac cycle.

Accepted Answer

Differences between diastole and systole of cardiac cycle are:SystoleDiastoleSystole refers to contraction phase of the heart.Diastole refers to expansion phase of the heart.Systole consists of contraction of auricles followed by contraction of ventricles.Diastole consists of relaxation of ventricles immediately followed by relaxation of auricles.

Question 17

Question 4(v)Draw a neat and labelled diagram to show the internal view of testis.

Accepted Answer

Below labelled diagram shows the internal view of testis:

Question 18

Question 5(iii)Who among the Dryopithecus and Ramapithecus was more man like?

Accepted Answer

Ramapithecus was more like man because Ramapithecus walked erect on its hindfeet and had few teeth and some fragments of jaw.

Question 19

Question 6(i)Give the exact location of occipital lobe of cerebral cortex.

Accepted Answer

The occipital lobe of cerebral cortex lies towards the back of the brain between parietal lobe and cerebellum.

Question 20

Question 6(ii)Differentiate between thigmotropic and chemotropic movement.

Accepted Answer

Differences between between thigmotropic and chemotropic movement are:Thigmotropic MovementChemotropic movementThe growth movement of plant parts in response to touch stimulus is called thigmotropic movement.The growth movement of plant parts in response to nutrient or chemicals is called chemotropic movement.Example — Plants such as sweet peas, Cuscuta and vines have tendrils which coil around other plants in response to one sided contact or touch.Example — Growth of pollen tube towards the sugary substance secreted by the stigma of the flower.

Solved Sample Paper 1

Section A

Section B