12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

Published on: 30/08/2022
QB365 provides a detailed and simple solution for every Possible Creative Questions in Class 12 Biology Subject - Botany - Economically Useful Plants and Entrepreneurial Botany, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Explain the origin of paper.
2.
What is Aloin? Write its significance.
3.
Write the uses of THC.
4.
Siddha medicine is an age old practice in our nation. According to this medicinal sysem, what is the major cause for all sort of illness in humans?
5.
Complete the statements.
(a) Alphonsa is a variety of_________
(b) Cayenne pepper is a variety of __________
6.
Mention the plant species or their products which are popularly known as
(a) Queen of species
(b) Black Gold of India and
(c) King of bitters.
7.
Name the plant source from which the following products are obtained.
(a) Maida
(b) Rubber
(c) Morphine
(d) Coffee
8.
The following are the binomials of economically useful plants. Mention their respective families.
(a) Borassus flabellifer
(b) Mangifera indica
(c) Saccharum officinarum
(d) Curcuma longa
(e) Capsicum annum
(f) Tamarindus indica
9.
What are organic pesticides?
10.
Write about the Henna with its origin and areas of cultivation and uses.
11.
What is vulcanization? Who invented it?
12.
Write a note on origin and area of cultivation of cotton.
13.
Mention the ways in which mangoes are used in Indian culinary.
14.
Give a botanical name of green gram and write its origin and area of cultivation and uses.
15.
Write a short note on foxtail millet.
1.
Paper production is Chinese invention from the inner bark of mulberry in 105 AD. Arabs learned the technique and improved in 750AD. printing increased the demand for paper.
2.
It is a mixture of glucosides. Gel used as skin tonic. Gives cooling effect. Creams, lotions, shampoos, shaving creams, aftershave lotions. Rejuvenation of aging skin. Emollient, antibacterial, antioxidant, antifungal and antiseptic.
3.
Effective pain reliever and reduces hypertension. Treating Glaucoma. Reducing nausea of cancer patients undergoing radiation and chemotherapy. Relief bronchial disorders, asthma.
4.
According to Siddha medicine, three humors namely vatam, pittam and kapam are responsible for the health of human being and any disturbance in the equilibrium of these humors result in ill health.
5.
(a) Mango
(b) Capsicum
6.
| (a) | Queen of Species | Cardamom |
| (b) | Black Gold of India | Pepper |
| (c) | King of bitters | Andrographis paniculata |
7.
| (a) | Maida | Triticum durum |
| (b | Rubber | Hevea brasiliensis |
| (c) | Morphine | Papaver somniferum |
| (d) | Coffee | Coffea arabica |
8.
| Economically Useful Plants | Families | |
| (a) | Borassus flabellifer | Arecaceae |
| (b) | Mangifera indica | Anacardiaceae |
| (c) | Saccharum officinarum | Poaceae |
| (d) | Curcuma longa | Zingiberaceae |
| (e) | Capsicum annum | Solanaceae |
| (f) | Tamarindus indica | Caesalpinioideae |
9.
Pest like aphids, spider and mites can cause serious damage to flowers, fruits, and vegetables. These creatures attack the garden in swarms, and drain the life of the crop and often invite disease in the process. Many chemical pesticides prove unsafe for human and the environment. It turns fruits and vegetables unsafe for consumption. Thankfully, there are many homemade, organic options to turn to war against pests.
10.
Henna
Botanical name: Lawsonia inermis.
Family: Lythraceae.
Origin and Area of cultivation:
It is indigenous to North Africa and South-west Asia. It is grown mostly throughout India, especially in Gujarat, Madhya Pradesh and Rajasthan.
Uses
An orange dye 'Henna' is obtained from the leaves and young shoots of Lawsonia inermis. The principal colouring matter of leaves 'lacosone" is harmless and causes no irritation to the skin.
This dye has long been used to dye skin, hair and finger nails.
It is used for colouring leather, for the tails of horses and in hair-dyes.
11.
The heating of the rubber with sulphur under pressure at 150°C is called vulcanization. It was invented by Charles Goodyear in 1839.
12.
Cotton is one of the oldest cultivated crops of the world. It has been cultivated for about 8000 years both in new world and in old world. Commercial cotton comes from four cotton species: two from the new world and two from the old world.
(1) Gossypium hirsutum
(2) G.barbadense are the New world species and
(3) G. arboretum
(4) G. herbaceum are the old world species.
In India, cotton is cultivated in Gujarat, Maharashtra, Andhra Pradesh and Tamil Nadu.
13.
Mango is the major table fruit of India, which is rich in beta carotenes. It is utilized in many ways, as dessert, canned, dried and preserves in Indian cuisine. Sour, unripe mangoes are used in chutneys, pickles, side dishes, or may be eaten raw with salt and chili. Mango pulp is made into jelly. Aerated and non-aerated fruit juice is a popular soft drink.
14.
Botanical name: Vigna radiata
Origin and Area of cultivation: Green gram is a native of India and the earliest archaeological evidences are found in the state of Maharashtra.
It is cultivated in the states of Madhya Pradesh, Karnataka and Tamil Nadu.
Uses
It can be used as roasted, cooked and sprouted pulse. Green gram is one of the ingredients of pongal, a popular breakfast dish in Tamil Nadu. Fried dehulled and broken or whole green gram is used as popular snack. The flour is traditionally used as a cosmetic, especially for the skin.
15.
Foxtail Millet
Botanical name: Setaria italica
This is one of the oldest millet used traditionally in India. Which is domesticated first in China about 6000 years. Rich in protein, carbohydrate, vitamin Band C, Potassium and Calcium. Uses It supports in strengthening of heart and improves eye sight. Thinai porridge is given to lactating mother.
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects

Maths

Chemistry

Physics

Biology

Computer Science

Business Maths and Statistics

Economics

Commerce

Accountancy

History

Computer Applications

Biology

Computer Technology

Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

Tamil

English

French
Tamilnadu Stateboard Standards