The change in the number of water plants in four ponds, P, Q, R and S, over four months is shown in the graph. Which pond is the most polluted?
Shikha arranged four magnets such that one end of each magnet was attracted to its neighbouring magnet as shown in the given figure.
Which of the following is another possible arrangement?
Study the given relationship based on adaptations in plants.
Select the option which correctly satisfies the same relationship.
APepper : Sal : Duckweed
BSundew : Ashok : Lotus
CMint : Banyan : Babool
DPondweed : Neem : Kikar
Refer to the given dichotomous key.
I. (A) Fibre obtained from natural resources - Go to II
(B) Fibre obtained from chemicals -
II. (A) Plant fibre - Go to III
(B) Animal fibre - Go to IV
III. (A) Fibre obtained from seeds of plants -
(B) Fibre obtained from stem of plants -
IV. (A) Fibre obtained from mammal -
(B) Fibre obtained from insect -
Which of the following is incorrect regarding P, Q, R, S and T?
AP is a petroleum based fibre which does not absorb water readily.
BBoth fibres Q and S are obtained from their source organisms without harming them.
CQ is separated from seeds by retting whereas R is separated from stems by ginning.
DS can be obtained from the same animal again and again whereas T can be obtained from an animal only once in its lifetime.
Solution is one type and option is one type
Which of the following Venn diagrams best represents the relationship amongst "Players, Men, Champions"?
A student places a magnet next to a metal fork and records what happens. Next, he places the same magnet next to a plastic fork and records what happens. Which question is the student most likely exploring in this investigation?
AHow do different materials react to magnets?
BDo items other than magnets have magnetic power?
CWhat causes magnets to be attracted to metal objects?
DDoes the size of a magnet affect its magnetic power?
The egg of cockroach hatches into a young cockroach, known as a nymph. It does not have wings and undergoes moulting several times because moulting allows it to grow in size to become an adult cockroach. Refer to the given table of the growth of a cockroach nymph and answer the question that follows:
How many times has the nymph moulted?