HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

What do you know about the word pBR332?

What do you mean Embryoids? Write its application.

Enumerate the anatomical adaptations of xerophytes.

List out any five morphological adaptations of halophytes.

Differentiate foeticide and infanticide.

Mangolism is a genetic disorder which is caused by the presence of an extra chromosome number ____________.

Give an account of the genetic control of the Rh factor. 

Paratope is an _________.

B cells that produce and release large amounts of antibody are called ____________.

List out chemical alarm signals produced during inflammation.

Which of the following is considered a hotspots of biodiversity in India.

Define endemism.

How many hotspots are there in India? Name them.

Choose the correct match pair.

Allergy involves

Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role.

Liver, thymus, stomach, thyroid, tonsils

Name and explain the type of barriers which involve macrophages.

What are interferons? Mention their role.

Explain the structure of immunoglobulin with a suitable diagram.

What are the cells involved innate immune system?