Read the given statements.
a. - It is a nest of 1.
b. - It's nest is made up of 2.
Select the option that correctly fills the above blanks.
A 1 - Weaver bird, 2 - Leaves and dried grass
B 1 - Tailor bird, 2 - Stones and pebbles
C 1 - Flamingo, 2 - Mud
D 1 - Partridge, 2 - Twigs and grass
Which of the following NOT reduces force that opposes motion?
A Tiling a floor
B Putting oil on the hinges
C Applying powder on the carrom board
D None of these
While demonstrating the reactivity order of different metals, a science teacher arranged the following apparatus :
Select the correct statement regarding this activity.
A A chemical change will take place in all the three beakers if metal Y is magnesium.
B There will be no change in colour of solution if metal Y is aluminium.
C The reactivity order of given metals is Y > Zinc > Iron > Copper if reaction occurs in beaker (III).
D All of these
The stages in the purification of water is given as follows:
Which of the following correctly represents order of purification of water?
A (ii) → (iii) → (i)
B (ii) → (i) → (iii)
C (iii) → (ii) → (i)
D (i) → (ii) → (iii)
ans. is wrong. it should be I, iii,ii
Select the character which is not common to the given animal group.
A They all breathe through lungs.
B They have hair on their body.
C Internal fertilization takes place in them.
D They all give birth to young ones.
I think answer should be A , Platypus lay eggs and do not give birth to young ones