Which of the following is not an example of adaptation?
A Spines of hedgehog
B White fur of polar bear
C Migration of humpback whale
D None of these
Refer to the given figure and select the incorrect statement.
(i) S is the coloured circular part of the eye.
(ii) P is the outermost part of eye and it maintains the shape of the eyeball.
(iii) Q is a layer of light sensitive receptors at the back of the eye.
(iv) R carries message from eye to brain.
(v) T is the folded skin above eye which protects eye from dust, durt, etc.
A (i) and (ii) only
B (ii), (iii) and (iv) only
C (i) and (v) only
D (ii), (iv) and (v) only
Which of the following practices related to plastic bags is not advisable?
A Plastic bags must be recycled properly.
B Plastic bags must not be used for storing eatables.
C Household waste should be thrown away in plastic bags.
D Shopkeepers should be discouraged from using plastic bags.
Find the missing number, if the same rule is followed in all the three figures.
the following pattern is 7 6=137 9=16so,8 4 12
Air pollutants are harmful to living things. Which of the following is/are their harmful effect(s)?
(i) They form acid rain.
(ii) They cause breathing problems in humans.
(iii) They interfere with photosynthesis in plants.
(iv) They result in the depletion of ozone layer.
A (i) only
B (i) and (ii) only
C (i), (ii) and (iii) only
D (i), (ii), (iii) and (iv)
It is because acid rain is caused by sulphur dioxide and nitrogen dioxide. Breathing problems are caused by various kinds of pollutants. Dust particles interfere with photosynthesis in plants. Chloro-fluoro carbons or CFCs result in the depletion of ozone layer.
When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light rays decreases after some reflections. This is because of
A Poor reflection from mirrors
B Absorption of some amount of light by mirrors
C Dispersion of light when the rays travel through the atmosphere
D Scattering of light by the mirrors.
Mirror never absorve light. I think answer is D
A student removes an ice cube tray from the freezer and places it on a table. The ice
cubes are solid and cold. The student forgets to put the ice cube tray back into the
freezer. After some time, the ice cubes should be
A Liquid and warmer
B Solid and warmer
C Liquid and colder
D Solid and colder.
A IS THE ANSWER