10th Standard Syllabus & Materials
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TN 10th English Prose - 4 - The Attic Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Poem - 3 - I am Every Woman Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Prose - 3 - Empowered Women Navigating The World Important Questions And Answers Study Material - QB365 Set A
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TN 10th English Supplementary - 2 - Zigzag Important Questions And Answers Study Material - QB365 Set A
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Published on: 12/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 10 Science Subject. It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 10th Standard Science 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 Science Test1.
Differentiate between outbreeding and inbreeding.
2.
How are stem cells useful in regenerative process?
3.
State the applications of DNA fingerprinting technique.
4.
Name three improved characteristics of wheat that helped India to achieve high productivity.
5.
Discuss the method of breeding for disease resistance.
1.
| S.No. |
Outbreeding |
Inbreeding |
|---|---|---|
| i. | Cross between two different species (unrelated) with desirable features of economic value are mated. | Mating of closely related animals within the same breed for about 4 - 6 generations. |
| ii. | It is the breeding of unrelated animals. The offsprings formed are called hybrids. | Superior males and superior females of the same breed are identified and mated in pairs. |
| iii. | The hybrids are stronger and vigorous than their parents. E.g: Mule | It helps in the accumulation of superior genes and elimination of genes which are undesirable. E.g: Hisardale. |
2.
(i) Sometimes cells, tissues and organs in the body may be permanently damaged or lost due to genetic to disease or injury.
(ii) In such situations stem cells are used for the treatment of diseases which is called stem-cell therapy.
3.
(i) DNA fingerprinting technique is widely used in forensic applications like crime investigation such as identifying the culprit.
(ii) It is also used for paternity testing in case of disputes.
(iii) It also helps in the study of genetic diversity of population, evolution and speciation.
4.
Semi dwarf nature high yield, disease resistance, early maturity.
5.
| Crop | Variety | Resistance to diseases |
| Wheat | Himgiri | Leaf and stipe rust, hill bunt |
| Cauliflower | Pusa Shubhra, Pusa Snowball K-1 | Black rot |
| Cowpea | Pusa Komal | Bacterial blight |
10th Standard Syllabus & Materials
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
