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Study the following table and select the correct option regarding P, Q, R and S.


AOrganism P can also respire through its buccopharyngeal cavity.
BOrganism Q could be a frog or an earthworm.
COrganism R can be Hydrilla or Vallisneria.
DRespiratory structure S is also found in scoliodon and whale.

Preeti burnt a fibre X. She found that X is selfextinguishing and leaves a dull black bead which crushes easily to powder. Which of the following could be fibre X?

AWool
BSilk
CNylon
DBoth A and B

Refer to the given food chain.

With respect to it which of the following graphs correctly shows the relationship of caterpillar and bird populations if X is introduced in the given food chain which exclusively feeds on bird?


A
B
C
D

Siddhi took some plasticine and shaped it into object X. She reshaped the same piece of plasticine into object Y. We can conclude that both objects have the same _________.


A P and Q only
B P and R only
C Q and R only
D P, Q and R

Mercury melts at -39°C and boils at 357°C. Alcohol melts at -115°C and boils at 78°C. At which temperature are both substances in liquid state?

A-49°C
B-15°C
C100°C
D360°C

Read the given statements and select the correct option.
Statement 1 : Concave mirrors are used in torches and car headlights.
Statement 2 : Concave mirrors converge the light of the bulbs of torches and car headlights to form a beam of light.

ABoth statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DStatement 1 is false but statement 2 is true.

Feeling the tremors of an earthquake, a scared resident of thirteenth floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

A Oxytocin
B Thyroxine
C Adrenaline
D Progesterone

When air is passed through red hot coke, a gaseous fuel is produced. The name of this gaseous fuel and its composition are respectively

A Natural gas, CO + H₂
B Producer gas, N₂ + CO
C Water gas, H₂ + CO
D None of these.

Which of the following is not a structural adaptation?

A Forelimbs of penguin are modified into flippers for swimming.
B Fennec fox has large ears to help it lose excessive body heat which enables it to inhabit hot xeric habitats.
C Palatable viceroy butterfly mimics unpalatable monarch butterfly to elude its predators.
D Cane toad and hedgehog aestivate to escape harsh summers.

Match column I with column II and select the correct option from the given codes.


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