Explanation

light blue litmus paper turning red under acidic conditions 

Red litmus paper turns blue under basic or alkaline conditions.

Purple litmus paper is neutral.

At pH levels of 0.0 to 4.5, the solution turns a red color;

At pH levels of 8.3 to 14.0, it turns a blue color.

Explanation

Robert Koch established the germ theory of disease by demonstrating a causal relationship.

Between specific microorganisms and particular diseases, most notably with his research on anthrax.

Explanation

Vaccination can be administered through injection, mouth as well as nose.

Vaccination was discovered by Edward Jenner.

Explanation

Solar PV cells generate electricity by absorbing sunlight and using that light energy to create an electrical current.

There are many photovoltaic cells within a single solar panel, and the current created by all of the cells together adds up to enough electricity to help power your home

Explanation

Aids way to spread is Touch

AIDS stands for Acquired Immunodeficiency Syndrome.

HIV stands for Human Immunodeficiency Virus.

HIV attacks the immune system of the body 

AIDS virus has single-stranded RNA

***

Explanation

Higher reducing sugar in Fruit Jelly may result in the crystallization of glycerol

The addition of glycerol and glucose syrup increased the equilibrium moisture content

and reduced sugar crystallization significantly.

Explanation

• Plants (made of cellulose),
• Bacteria (peptidoglycan),
• Fungi (chitin).

Explanation

Using condoms the right way can help prevent pregnancy and lower the risk of getting a sexually transmitted infection (STI).

the disadvantages of using a condom:

• May disrupt spontaneity during sex.
• Can reduce sensitivity.
• Some men cannot maintain an erection when using a condom.
• Some men and women can develop an allergy or sensitivity to latex

***

ND1-2-2023

Explanation

The presence of lactic acid in milk is due to the fermentation of lactose caused mainly by lactic bacteria

Explanation

Anaemia is a condition in which the number of red blood cells capacity is not sufficient.

Iron Deficiency is the most common cause of Anaemia.