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Which body parts act as the fulcrums of levers?

A Muscles
B Bones
C Joints
D Tendons

Study the diagram shown below which shows X, Y and Z as three states of water. Which arrows, K, L, M or N, represent the processes of freezing and boiling?

Earthquakes at two places A and B were measured by a seismograph which recorded the magnitude as 2 and 4. The magnitude of tremors and the destructive energy at A and B can be compared as

A Tremors at B are two times those at place A
B Tremors at B are four times those at place A
C Tremors at B are 100 times those at place A
D Tremors at B are 1000 times those at place A.

The given table represents the properties and uses of a few plastics.

The plastics represented incorrectly are

A I and IV only
B I and III only
C II and III only
D I, III and V only.

Kepler's third law states that square of period of revolution (T) of a planet around the sun is proportional to third power of average distance r between the sun and the planet i.e. T² = Kr³ (here K is constant). If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation, force of attraction between them is F = GMm/r², here G is gravitational constant.
The relation between G and K is described as

A K = G
B K = 1/G
C GK = 4π²
D GMK = 4π²

Direction : Refer to the given dichotomous key regarding cell organelles and answer the questions 49 and 50.


AP can be ER and Q can be Golgi apparatus.
BR can be chloroplasts and S can be ribosomes.
CP can be nucleus and T can be ribosomes.
DR can be mitochondria and S can be lysosomes.

If four identical balls are dropped at the same time and from the same height, which ball will land first?


ABall 1
BBall 2
CBall 3
DBall 4

Ridhan classified animals in four groups on the basis of their feeding habits. In doing so, he wrongly placed one animal in one of the groups. Identify this group and select the correct option.

A Giraffe, rabbit, wildebeest and deer
B Crocodile, crow, snake and eagle
C Leech, mosquito, lice and bed bug
D Tiger, snow leopard, wolf and lion

The given figure shows a typical animal cell with its parts being labelled as 'a - j'. Identify the labelled parts and select the incorrect option regarding it.


A The organelles e, h, g and i are membrane-bound organelles which function in close coordination with one another.
B 'f' organelle is responsible for the synthesis of fats inside the cells and it stores Ca²⁺ for release during muscle contraction.
C a and b have selective permeability i.e., they allow only selected substances to pass inwardly.
D 'j' is the site for protein synthesis. It allows hereditary message from 'd' to get translated into proteins.

The given set-up shows the separation process of a mixture of water and materials X and Y. X and Y respectively could be_______.


AMud and salt
BSalt and sugar
CSugar and salt
DMud and clay