The formation of which of the following polymers involves a hydrolysis reaction?

The supportive skeletal structures in the human external ears and in the nose tip are examples of

$A$ body is executing simple harmonic motion. At a displacement $x$ its potential energy is $E_1$ and at a displacement $y$ its potential energy is $E_2$. The potential energy $(E)$ at displacement $(x+y)$ is

The chemical entities present in the thermosphere of the atmosphere are:

Which organ in an adult human causes the least damage if removed?

Assertion $(A)$: Rapidly changing temperatures can be measured by thermocouples. Reason $(R)$: The thermal capacity of the junction of a thermocouple is very small.