Name the mode of nutrition in $Roundworm$ and $Plasmodium$.

Apart from $CO_2$ and $H_2O$, name four other raw materials which are needed by plants for photosynthesis.

Name any two digestive enzymes secreted in the human digestive system and write their functions.

Explain the process by which the energy requirements of autotrophic organisms are fulfilled. In which form are the unused carbohydrates stored?

Two of the following organisms have a holozoic mode of nutrition. These organisms are:

A unicellular animal $P$ having no fixed shape ingests a food particle by forming temporary finger-like projections $Q$. The food particle is engulfed with a little surrounding water to form a temporary stomach $R$ inside it. The chemicals $S$ from surrounding cytoplasm enter into $R$ and break down food into small and soluble molecules by chemical reactions. The digested food is absorbed directly into cytoplasm by the process $T$. The undigested food is thrown out of the body by the rupture of a cell membrane $U$ in a process called $V$.
$(a)$ Name the unicellular animal $P$.
$(b)$ What are $(i)$ $Q$, and (ii) $R$?
$(c)$ Name $(i)$ chemical $S$, and (ii) process $T$.
$(d)$ Name $(i)$ organelle $U$, and (ii) process $V$.