A scientist observed a sudden increase in the number of algae in a lake over a few days. The reason behind it could be that ____________.
AWater cycle in the area got unbalanced
BElectronic wastes were being dumped in a nearby area
CA factory with heavy smoke discharge has been established nearby
DHeavy amount of chemical fertilisers were being used in a nearby field
Option d As heavy amount of chemicals fertilizers were being used in a nearby fiel
Read the given passage and answer the following questions. A cuboid rests on the floor. Data of the cuboid and some other parameters are given here.
By rotating the cuboid, what is the minimum pressure it can exert on the floor?
Refer to the given Venn diagram and select the correct statements regarding animals X, Y and Z.
(i) Y can close its nostrils and remain underwater for long duration.
(ii) X possess glands under the eyes that help the body to get rid of excess salt.
(iii) Blubber is present under the skin of X and Z which protects them from cold.
(iv) X and Y are adapted to live in extremely cold climate of polar regions.
(v) Y live in groups and huddle together to keep themselves warm.
(vi) Z camouflage with the surrounding to avoid predators.
A (i), (ii), (iv) and (vi) only
B (i), (iii), (iv), (v) and (vi) only
C (ii), (iii), (iv) and (v) only
D (i), (ii), (iii) (iv), (v) and (vi)
Study the given Venn diagram.
Identify P-S and select the INCORRECT statement.
AQ could possess hair whereas R could possess feathers.
BP could possess beaks whereas S could possess spiracles.
CBoth R and S may possess six legs.
DBoth P and R could possess feathers.
in C insects breathe through spiracles.