Refer to the given food web. If a population of an organism X is introduced in this community who preys on mice and snake then what will not be the likely consequence over time ?
AThe population of owl will decline with time.
BThe populations of frog and sparrow will increase with time.
CPlant and grasshopper populations will remain unaffected.
DBoth A and B
If a converging beam of light is incident on a concave
mirror, whose position can be adjusted, then it
A Must form a real image
B Must form a virtual image
C May form a real or virtual image
D None of these.
can you please explain with the help of diagram
Select the correct statement out of the following.
ASandy soil needs regular addition of fertilisers as it holds a larger amount of water.
BLoamy soil has good qualities of both sandy and clayey soil and thus is most suitable for pottery.
CClayey soil develops cracks in hot weather causing harm to the roots of plants, thus is not suited for agriculture.
DThe water holding capacity is highest in clayey soil and lowest in loamy soil.
Which of the following graphs correctly depicts the body temperature of the given animals with respect to ambient temperature over a 24 hours period?
A ball of mass ‘m’ was dropped from height ‘h’ on 3 different planets X, Y and Z one at a time. The given
graph shows the comparative account of time taken
by the ball to reach the surface of these planets when dropped
from the same height.Which of the following holds true
AThe ball will weigh heaviest on planet X and lightest on planet Y.
BIt will be easier to lift a load on planet X as compared to planets Y and Z.
CThe layer of atmosphere is most likely to be absent on planet Y but present on planets X and Z.
DBoth A and C
Why do you think stone pebbles are placed around trees in urban area instead of paving solid concrete around the trees?
(A) The stone pebbles help to support the roots of the trees.
(B) The stone pebbles allow the trees to grow neatly.
(C) The stone pebbles allow air and water to get to the roots of the trees.
(D) The stone pebbles allow the leaves to fall through the gaps and fertilize the trees.
Mohit wants to separate a mixture of sugar, water and pebbles. Which of these separation methods should he use to separate all the three components?
none of the answers is correct.In option A,through filtration,we ca seprate pebbles.After that through Evaporation,we can get sugar,but wter will get evaporated.So,we willnot get water.So option A ,B,C,D are incorrect