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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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12th Standard

TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A

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12th Standard

TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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12th Standard

TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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12th Standard

TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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12th Standard

TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Biology (Botany) Subject Asexual and Sexual Reproduction in Plants Book Back 2 Mark Questions with Solution Part - II

Published on: 02/06/2021

QB365 provides detailed and simple solution for every book back questions in class 12 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.

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Std: 12th Standard - Biology

chapter: - Book back Questions

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Questions:

Generic 2

4 x 2 = 8

“Tissue culture is the best method for propagating rare and endangered plant species”- Discuss.

What is layering?

Mention the contribution of Hofmeister towards Embryology.

What is reproduction?

Generic 3

1 x 3 = 3

A detached leaf of Bryophyllum produces new plants. How?

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Answers Key:

Generic 2

4 x 2 = 8

A single cell from a rare and endangered plant can be grown into a an entire plant. So it is considered as the best method.

The stem of a parent plant is allowed to develop roots. After formation of roots, the rooted part is cut and separated and planted to grow into a new plant (eg) Ixora and Jasminum.

Hofmeister described the structure of pollen tetrad

Reproduction is a biological process in which an organism give rise to offsprings. This helps to maintain continuity of its species.

Generic 3

1 x 3 = 3

In Bryophyllum, the leaf is succulent and notched on its margin. Adventitious buds (epiphyllous buds) develop at these notches. They develop into new plants forming a root system. They become independent plants when the leaf gets decayed.