Explanation

Hagfish are marine creatures that possess four hearts.

These hearts pump blood through a series of vessels.

These play a role in maintaining blood pressure and circulation.

Explanation

The antibiotic substance "penicillin" was discovered by Alexander Fleming, a Scottish scientist.

In 1928, he noticed that a mold called Penicillium notatum had antibacterial properties.

This leading to the development of penicillin as a crucial antibiotic.

Explanation

Robert Koch is famous for his work on tuberculosis.

He identified the bacterium Mycobacterium tuberculosis as the cause of the disease.

Explanation

Nails, feathers, hair, and horns are made up of proteins.

These structures primarily consist of keratin.

Keratin is a type of protein that provides strength and durability.

Explanation

The human brain has three main parts: the cerebrum, brainstem, and cerebellum.

Cerebrum:

The largest part, responsible for higher brain functions like thought, memory, and voluntary movement.

Brainstem:

Controls basic life functions like breathing, heart rate, and blood pressure.

Cerebellum:

Coordinates movement and balance.

Explanation

Sucrose is the chemical name for the type of sugar found in sugarcane.

It is a disaccharide composed of glucose and fructose.

Sucrose is widely used as a sweetener in food and beverages

And is extracted from sugarcane and sugar beets for commercial use.

Explanation

Hydrogen peroxide (H₂O₂) is commonly used as a disinfectant to kill bacteria, viruses, and fungi on surfaces.

It works by releasing oxygen when it comes into contact with the surface, which helps to destroy pathogens.

Additional information:

 While other substances like vinegar and lemon juice have some antimicrobial properties,

hydrogen peroxide is more effective as a disinfectant.

Explanation

Sodium benzoate is a commonly used food preservative

That helps prevent the growth of bacteria, yeast, and molds.

It is often used in acidic foods and beverages, such as carbonated drinks and pickles

Explanation

Nutrients, particularly glycogen (a form of glucose), are primarily stored in the liver.

It releases glucose into the bloodstream when needed to maintain blood sugar levels and provide energy for the body.

The liver's role is crucial in managing nutrient availability and maintaining metabolic balance.

Explanation

Adenosine triphosphate (ATP) is the primary energy currency in a cell.

It stores and transfers energy within cells, powering various biological processes such as:

• muscle contraction
• protein synthesis
• cell division