SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions

Mitosis was discovered by ______.

Genetic variations occur in meiosis because of ______.

Spindle formation occurs in amitosis.

A mature RBC lacks a nucleus.

Explain amitosis.

Organs that are concerned with the formation, storage, and elimination of urine constitute the ______.

In the process of urine formation, the maximum amount of water from the glomerular filtrate is reabsorbed in the ______.

The narrower lower part of the uterus is  ______.

The bunch of capillaries inside the Bowman’s capsule.

Thin muscular tubes carry urine from the kidney to the urinary bladder. 

What is the contribution of Joseph E. Murray to Nephrology?

Draw the human excretory system and label the parts.

Select the substances given below that need to be excreted from the body, (urea, amino acids, carbon dioxide, uric acid, glucose)

Rearrange the jumbled words and fill in the blanks in the following passage to make it a meaningful description.

The human urinary system consists of a pair of ______ ( nyedik), which form the urine; a pair of ______ (ertreu), which conduct the ______ (neuri) from kidneys to the ______ (naryuri drebdal) for storage of urine and a ______ (reuhrat) through which the urine is voided by bladder contractions.

Give an example of a substance used to protect food grains in the olden days ______.

Smoking is a method of food preservation used for ______.

The gas ______ is filled in airtight packets of potato wafers.

______ is a natural preservative used to increase the shelf life of fruit juices/squash.

Give examples of synthetic food preservatives.

Why do we need to preserve food?