Define heliophytes and sciophytes. Name a plant from your locality that is either a heliophyte or a sciophyte.

In which of the following habitats does the daily temperature of the soil surface show the maximum variation?

Match the following columns:

Column-$I$ (Temperature)	Column-$II$ (Organism)
$P$. Above $100^{\circ}C$	$I$. Thermoacidophiles
$Q$. $37^{\circ}C$	$II$. Human
$R$. Below $0^{\circ}C$	$III$. Antarctic fish

Consider the following statements $(A - D)$ each with one or two blanks.
$(A)$ Some snails go into $ . . . . . . (i) . . . . . . $ to avoid $ . . . . . . (ii) . . . . . . $ related problems.
$(B)$ Since small animals have a $ . . . . . . (iii) . . . . . . $ surface area relative to their volume,they tend to lose body heat $ . . . . . . (iv) . . . . . . $ when it is cold outside.
$(C)$ Next to temperature,$ . . . . . . (v) . . . . . . $ is the most ecologically important environmental factor.
$(D)$ Every $ . . . . . . (vi) . . . . . . $ the famous Keoladeo National Park in Rajasthan hosts thousands of migrating birds.
Which one of the following options gives the correct fill-ups for the respective blank numbers from $(i)$ to $(vi)$ in the statements?

Is it true that there is more solar energy available in the tropics? Explain briefly.

Biotic factors are