Tuber, bulb, rhizomes are modifications of roots.

In the plants of potatoes and sweet potatoes-

In which part of the plant is the food prepared?

Identify the four plants given in the following table and name the different modifications in each of them.

In the plants of potatoes and sweet potatoes-

Which part transports the food?

In the plants of potatoes and sweet potatoes-

Where is the food stored?

Refer to the given dichotomous key.

I. (a) It conducts food, water and minerals to different parts of the plant. -Go to Il
(b) It absorbs water. -Go to Ill

Il. (a) It is modified to climb. - $\boxed{P}$
(b) It is modified to store water - $\boxed{Q}$

Ill. (a) It is modified to climb - $\boxed{R}$
(b) It is modified to absorb moisture from air - $\boxed{S}$

Select the incorrect option regarding $P-S$.