Explanation

Explanation

Explanation

John Snow is considered the father of epidemiology.

It is the study of disease transmission.

It relies on collecting thorough data on both the patients as well as their surroundings.

Epidemiologists track diseases to help warn and protect the public.

Explanation

Explanation

Sea cucumbers belong to the class Holothuroidea within the phylum Echinodermata.

Unlike some other echinoderms like starfish (class Asteroidea), sea cucumbers do not have arms that are sharply set off from a central disc

Explanation

Explanation

The notochord is a flexible, rod-shaped structure that is present during the embryonic stage of all chordates

It provides support and defines the primitive axis of the body.

This characteristic is a key feature that distinguishes chordates from non-chordates.

Explanation

Intradermal injection means the drug is injected into the dermis, the layer just beneath the epidermis.

It is commonly used for allergy tests and tuberculosis screening.

Explanation

Artemisinin is a specific anti-protozoan drug used primarily to treat malaria, a protozoal disease caused by Plasmodium species.

It works by producing free radicals that damage protozoan proteins and membranes.

Explanation

Magnesium sulfate acts as a muscle relaxant by blocking neuromuscular transmission.

It is used clinically to relieve muscle spasms and prevent seizures in certain conditions.