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Refer to the given food web and select the correct option regarding it.


A If a species population is introduced in this community who is a voracious feeder of T then it will wipe out population of V with time.
B P is producer, Q, S and T are herbivores whereas R, V and U are carnivores in this food web.
C There are seven interconnected food chains in the given food web.
D If P population is removed from this community then Q population will be negatively affected but T population will remain unaffected for a long period of time as it has an alternative prey S to feed upon.

Study the given flow chart and select the option which correctly identifies W, X, Y and Z.


AW is Sycon and X is Fasciola.
BX is Planaria and Y is Periplaneta.
CZ is Limulus and W is Chiton.
DAll of these

Refer to the given table to identify P, Q, R and S and select the correct statement regarding them.


AP can be Budh.
BQ can be the natural satellite of Earth.
CR can be the morning or evening star.
DS can be the ringed planet of our solar system.

Which of the following can be found in the given word grid?


AAn insect that attacks clothes made from natural fibre.
BA natural fibre that gives odour of burning paper upon burning.
CA fibre obtained from pupa of an insect.
DFirst synthetic fibre made by man.

Refer to the given dichotomous key and select the correct option regarding it.
I. (A) Animal shows radial symmetry - Go to II
(B) Animal shows bilateral symmetry - Go to III
II. (A) Acoelomate animal - P
(B) Coelomate animal - Q
III. (A) Anus develops prior to mouth in the embryo - R
(B) Mouth develops prior to anus in the embryo - S

AP could be Spongilla that reproduces asexually by formation of gemmule.
BQ could be Ophiothrix having body surface covered by mesodermal endoskeleton of calcareous spines.
CR could be Dugesia having an incomplete digestive tract.
DS could be Milvus that respires through lungs.

Ridhima mixes 2 gm of sugar in 50 cm³ of water. What will be the final volume of the solution so formed?

AIt will be approximately 50 cm³.
BIt will be 70 cm³.
CIt will be slightly less than 50 cm³.
DCannot be predicted

Lime water turns milky when carbon dioxide is passed through it. Which of the following gases will turn lime water milky?
(i) Gas collected from a burning candle
(ii) Gas collected when a boy is breathing out
(iii) Major gas released from a plant in a greenhouse at night
(iv) Major gas released by a plant preparing its food on a hot afternoon

A(i) and (ii) only
B(i), (ii) and (iii) only
C(ii) and (iv) only
D(i), (iii) and (iv) only

Which of the following statements are true?
(i) 10 g of gold has more mass than 5 g of cotton wool.
(ii) 5 g of gold has the same mass as 5 g of cotton wool.
(iii) 10 g of gold has more mass than 10 g of cotton wool.
(iv) 10 g of gold occupies the same amount of space as 10 g of cotton wool.

A(i) and (ii) only
B(ii) and (iv) only
C(iii) and (iv) only
D(i), (ii) and (iv) only

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

	Column I		Column II
(a)		(i)	10 SI units
(b)		(ii)	2 SI units
(c)		(iii)	–20 SI units
(d)		(iv)	22 SI units
	Value of velocity of block Y	(v)	30 SI units

Which of the following can be found in the given word grid?


AName of the state where suria-seleng is worn traditionally.
BMethod of making clothes using a single strand of thread.
CA tool used by potter to bake the pots.
DA type of house used by nomads.