Read the given paragraph with few blanks. __(i)__ body of birds reduces resistance offered by wind. Their __(ii)__ are modified into wings which help them in flight. Birds have __(iii)__ bones which make their body light. Birds are __(iv)__ and maintain constant body temperature. __(v)__ are attached to their lungs which serve as reservoirs of air. Birds maintain equilibrium in flight due to well developed __(vi)__ of brain.
Select the option that correctly fills any 3 of these blanks.
A(i) Spindle shaped, (ii) Hindlimbs, (vi) Cerebrum
B(ii) Forelimbs, (iv) Homeothermic, (vi) Cerebellum
C(i) Radially symmetrical, (iii) Pneumatic, (v) Air sacs
D(iv) Poikilothermic, (v) Air sacs, (vi) Cerebrum
Sagar wants to magnetise an iron bar EF by the stroking method. The given figure shows the direction of stroke.
Which of the following is a possible set of polarities for the given arrangement?
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 ____________.
A Water cycle in the area got unbalanced
B Electronic wastes were being dumped in a nearby area
C A factory with heavy smoke discharge has been established nearby
D Heavy amount of chemical fertilisers were being used in a nearby field
dddddddddddddddddddddddddddddddddddddddd is the ans