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Which of the following statements is INCORRECT?

A Brain controls all the body parts through nerves.
B When we breathe in air, the lungs increase in size.
C Similar cells join together to form organs.
D Reproductive system of men is different from women.

10 to the 5^th power seconds is closest to the amount of time

A Of a full length movie
B For the Earth to rotate once
C Of an average human lifetime
D Since humans first appeared on the Earth

Refer to the given figure and select the correct option regarding it.


AThis technique improves the quality of ground water by diluting the dissolved salts and other substances found in the ground water.
BThe technique helps to store water which can directly be used for gardens or for some cleaning purposes.
CThe technique is best functional in summer months only.
DBoth A and B

Refer to the given dichotomous key.


AClothes made purely of P do not wrinkle easily and also cannot absorb sweat.
BQ can be best suited for summer clothing as it absorbs sweat and breathes well.
CR can be obtained by retting of jute stems and is used for making carpets, ropes, etc.
DT was first developed in Africa whereas India is the leading producer of S.

Match column I with column II and select the correct option from the given codes. (There can be more than one match for column I.)


A a – (v), b – (ii), (vi), c – (i), (iii), (iv)
B a – (vi), b – (i), (iv), c – (ii), (iii), (v)
C a – (iii), b – (ii), (v), c – (i), (iv), (vi)
D a – (ii), b – (i), (vi), c – (iii), (iv), (v)

In a 200 m race, two competitors P and Q reached the finishing line at the same time. Which of the following graphs shows that both the competitors reached the finishing line at time t?

A
B
C
D

Which of the following option is matched correctly?

APlane mirror - Real image
BDiverging lens - Concave lens
CVirtual image - Can be taken on screen
DMagnifying glass - Concave lens

X is a wind pollinated plant whereas Y is an insect pollinated plant.
Which of the following cites the correct difference between plants X and Y?

APlant X has sticky small and compact stigmas while plant Y has long, exposed and feathery stigmas.
BPlant X bears small inconspicuous flowers in dense clusters near the ends of the branches, while flowers of plant Y are big, brightly coloured and scented.
CFlowers of plant X produce nectar and have big petals whereas nectar and odour are absent in flowers of plant Y.
DPlant X is always self pollinated while plant Y shows cross pollination.

In the given figure, at which position of earth (1, 2, 3 and 4) would people living in northern hemisphere have hot and sunny days and in southern hemisphere have cold days?


A 1
B 2
C 3
D 4

Ananya took a green leaf and then boil it in water. After boiling, she put it in alcohol in a water bath. After some time, she performed iodine test on the leaf. The leaf turns blue black. This shows that

A Chlorophyll is needed for photosynthesis.
B Sunlight is needed for photosynthesis.
C Starch is produced in green leaf during photosynthesis.
D Light is needed for photosynthesis.