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Three species of fishes X, Y and Z with different body patterns are found in a lake. A predator who feeds on all these three fishes is introduced into the lake. Which of these fishes will be least affected?


A Fish Z because it lives near the ground.
B Fish Y because it can show camouflage.
C Fish X because it lives near surface.
D All the three fishes will be equally affected.

Which of these needs both water and air?

AA moving sail boat
BSeed growing into a plant
CDrying of wet floor
DBoth A and B

Which of the following combinations is the correct order of layers of a forest starting from the top ?

AEmergent, canopy, understorey, forest floor
BCanopy, understorey, emergent, forest floor
CForest floor, canopy, emergent, understorey
DUnderstorey, canopy, forest floor, emergent

Refer to the given word grid and answer the question.

Few objects are hidden in the given word grid. How many of them are found in a first aid box?

A2
B3
C5
D4

Which of the following statements is correct?

AAll living things are natural
BAll non-living things are man-made
CAll living things can move from one place to another
DAll non-living things can grow and increase in size

Aquil used a strong magnet to stroke the iron nail fifty times in the same direction continuously.

After stroking, he wanted to test it by bringing a compass near the tip of the nail. Which one of the following diagrams shows the correct observation?

A
B
C
D

Read the given statements and select the correct option.
Statement 1 : When sea water is allowed to stand in shallow pits, water gets heated by sunlight and slowly turns into water vapour through evaporation.
Statement 2 : Boiling takes place at all temperatures.

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

The motion which repeats itself after a regular interval of time is ____.

ARectilinear motion
BPeriodic motion
CCircular motion
DBoth A & B

Hydrogen exists in three isotopic forms, ¹₁H, ²₁H, ³₁H respectively known as protium, deuterium and tritium. Why are all the isotopes neutral in nature?

A Since neutrons are neutral in nature hence, isotopes are electrically neutral.
B All the isotopes have one electron and one proton, hence they are neutral.
C All the isotopes have one proton and one neutron, hence they are neutral.
D Increasing number of protons in the isotopes make them neutral.