Explanation

White Corpuscles, or White Blood Cells (WBCs), or Leukocytes, act as a defense mechanism by fighting infections and diseases in the body.

They play a key role in the immune system.

They help fight infections and protect the body against foreign substances, such as bacteria, viruses, and other pathogens.

Explanation

Blood cells are made in the bone marrow.

The bone marrow is the soft, spongy material in the center of the bones.

It produces about 95% of the body's blood cells.

Explanation

• Red has the longest wavelength in the visible spectrum,
• Measuring roughly 620 to 750 nanometers (nm).

Additional Information:

• Yellow: Incorrect – mid-to-long range, ~570–590 nm
• Blue: Incorrect – much shorter, ~450–495 nm

Explanation

In the early 1950s, the first successful vaccine was created by US physician Jonas Salk.

Salk tested his experimental killed-virus vaccine on himself and his family in 1953

First used Salk vaccine in 1955 ( in activated)

while 

A live attenuated (weakened) oral polio vaccine developed by Dr. Albert Sabin and first used in 1961.

Israel launched a polio vaccine drive after 1988 in April 2022.

Explanation

AUG is the start codon in mRNA that signals the beginning of protein synthesis.

It also codes for the amino acid methionine.

Explanation

The following table provides the botanical names for a variety of familiar plants: 

Explanation

Explanation

Sound travels as a longitudinal wave, where particles vibrate parallel to the direction of wave motion.

In contrast, light is a transverse wave, with vibrations perpendicular to the direction of propagation.

Explanation

Oxidation is the loss of electrons during a reaction by a molecule, atom or ion.

Oxidation occurs when the oxidation state of a molecule, atom or ion is increased.

The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

Explanation

Mercury remains liquid at a wide range of temperatures, has uniform expansion.

It is easily visible due to its opacity.

It does not stick to glass, allowing accurate and consistent readings in thermometers.