Which of the following is a pair of modified roots of a plant?

Which of the following is the correct floral formula for the family Solanaceae?

When the calyx, corolla, and androecium arise from below the ovary, the flower is described as:

Match the following leaf modifications with their correct examples: a. Leaf apex modified into spines — i. Yucca b. Entire leaf modified into tendril — ii. Lathyrus aphaca c. Leaf apex modified into tendril — iii. Gloriosa d. Entire leaf modified into a spine — iv. Opuntia