How many layers of pericarp are present in a mango fruit?

How many plants in the list given below have composite fruits that develop from an inflorescence? Walnut,poppy,radish,fig,pineapple,apple,tomato,mulberry.

What are $P$ and $Q$ in the given figure?
$P \quad\quad Q$

Hairy styles are present in

The fruit developed from a single ovary is said to be:

From which part of the coconut is the fibrous coir obtained?