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

Assertion (A): Our retinal print can be forged.
Reason (R): Our retinal print is unique.

Mention the use of a Biometric system.

How can Fingerprints be identified?

How is alcohol consumption detected?

Give the sequence of the events occurring during the prophase of mitosis.

Identify the stage of mitosis from the below picture. List the chromosomal events in this stage.

Match the following:

List the methods of food preservation.

Why is sugar used to preserve fruits and fruit products?

The stages of the malarial parasite are developed in the ______ of mosquito.

The incubation period of the virus for chikungunya is usually ______.

The disease that displays Nocturnal periodicity ______.

The most fatal form of malaria is caused by ______.

Mosquito-borne viral diseases are ______.

The use of ______ drugs kills the stages of the malaria parasite.

Nilavembu kudineer is known to increase ______.

Filaria is transmitted by the bite of an infected Culex mosquito.

Malaria is caused by the fungal parasite plasmodium.

Assertion: Chikungunya is transmitted in humans by the bite of an infected Aedes aegypti mosquito during the daytime.
Reason: Chikungunya is caused by Rotavirus.

Define the following:

Vector