The abnormal condition in which breast tissue develops in males,similar to females,is known as:

The hormone prolactin was discovered by:

Pheromones are secreted by which of the following?

Complete the following analogy-based questions:
$1$. Hyperglycemia : Diabetes Mellitus :: Beta cells : ....
$2$. Excess Growth Hormone : Gigantism :: Low secretion : .......
$3$. Pineal gland : Melatonin :: Somatostatin : .....

Choose the incorrect statement.

Sympathin was the previous name of