Pheromone describes those chemical agents produced by organisms that can trigger social responses from other members of the same species.

What is an endocrine gland? What is the difference between an endocrine and an exocrine gland? Name the gland performs both endocrine as well as exocrine functions.

Match List I and List II

Choose the correct answer from the options given below: 

The pituitary gland and hypothalamus are shown in the figure with labels $1$ to $5.$ Identify them correctly.

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 $100\}$