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
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.
The above question has 2 correct answers C and D.
If four identical balls are dropped at the same time and from the same height, which ball will land first?
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
CROW IS AN OMNIVORE NOT A CARNIVORE AS MENTIONED IN THE SOLUTION
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.
Refer to the given flow chart and select the incorrect statement regarding W, X, Y and Z.
A W could be abundant in RBCs whereas X could be absent in xylem parenchyma.
B Y provides energy during starvation whereas Z provides surface for synthesis of steroid hormones.
C W helps in synthesis of proteins whereas Y secretes enzymes which are used for breaking limiting membrane of eggs.
D X could provide intermediates for the synthesis of certain steroids and cytochromes whereas Z stores calcium for release during muscle contraction.
The hairy skin of the sheep has two types of fibres that form its fleece: (i) the coarse beard hair and (ii) the fine soft under hair close to the skin. Which of the hair provide the fibres for making wool?
C(i) and (ii)
DNone of these
But for making what is not mentioned like for making sweater or carpet
Select the option which would most closely resembles the
mirror image of the given Fig. (X), if the mirror is placed along MR.