List the types of toothed leaf margins.

Consider the following morphological biochemical or physiological characteristics of plants.

$\mathrm{i}.$ Presence of hairy leaves $\mathrm{ii}$$.$ Production of more nectar is flower
$\mathrm{iii}.$. High sugar content in plant parts $\mathrm{iv}.$ Presence of higher aspartic acid concentration.

Choose the correct combination of statements which give natural resistance to plants against insect pests:

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Label the part in the diagram of the leaf below and write a note of it.