SSLC (English Medium) कक्षा ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Atoms are so tiny their mass number cannot be expressed in grams but expressed in ______.

The ratio of masses of H and O in H₂O is ______.

Why is the term basicity is used for acids?

The antiseptic used for cleansing the wounds is ______.

Antiseptics are used internally to treat infections of the ______ and ______.

Assertion (A): Antiseptic is a substance that prevents infections caused by disease-causing pathogens.
Reason (R): Antiseptics either kill the microorganism or prevent their growth.

How are antiseptics used?

How is the body wall of coelenterates arranged?

What is polymorphism?

The function of phloem fibers is ______ to the plant body.

Conduction can be bidirectional in phloem tissue.

Explain the components of phloem tissue.

Give reasons for the following

The wall of the stomach is not digested by its own enzyme.

Pellagra is a deficiency disease, ______ the vitamin related to it.

Louis Pasteur developed vaccination against Rabies and Anthrax.

What is Malnutrition?

Name any two Protein Energy Malnutrition (PEM) diseases.

AIDS is a ______ disease.

What is an epidemic disease?

Differentiate between Infectious and Non-Infectious diseases.