BIOLOGY CH24 Environmental Science — Science STD 9 — Question

A teabag placed in a cup of hot water will diffuse into the water.

The yield of greenhouse is very high compared to outdoor cultivation.

State whether true or false. If false, correct the statement.

Nitric acid in the stomach kills microorganisms in the food.

• True

• False

Permanent magnets are made of hard magnetic materials like alnico.

State whether true or false. If false, correct the statement.

Lack of adequate fats in diet may result in low body weight

• True

• False

Hepatitis A causes cirrhosis of the liver.

When the leaves of Mimosa pudica plant are touched with the finger, they fold up quickly.

Sublimation is conversion of solid into liquid.

State whether true or false. If false, correct the statement.

Trachea are the respiratory organ of Annelida.

• True

• False

An infection develops when these pathogens enter the human body.