12th Standard Syllabus & Materials

12th Standard

TN 12th English Poem - 6 - Incident of the French Camp Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 6 - On the Rule of the Road Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 5 - The Chair Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Supplementary - 4 - The Midnight Visitor Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Poem - 4 - Ulysses Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 4 - The Summit Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Biology (Botany) Subject Plant Breeding Creative 2 Mark Questions with Solution Part - II updated Creative Questions

Published on: 13/05/2022

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

latest Creative Questions

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 Test

QB365 Student Learing Managemnet System

Std: 12th Standard - Biology

chapter: - Creative Questions

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Generic 2

5 x 2 = 10

Name the insect resistant varieties developed in the following crops.
(a) Okra (b) Rapeseed mustard.

State anyone advantage and one disadvantage of polyploid breeding.

Define Heterosis?

Who coined the term "pureline"? Define it.

What are bio-pesticides? Why they are considered better than synthetic pesticides?

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Generic 2

5 x 2 = 10

(a) Okra: Pusa Sawani and Pusa A-4 varieties of Okra are resistant to shoot and fruit borers.
(b) Rapeseed mustard: Pusa Gaurav variety of rapeseed mustard shown resistance against Aphids.

Advantage: Polyploidy often exhibit hybrid vigour and increased tolerance to biotic and abiotic stresses.
Disadvantage: Polyploidy results in reduced fertility due to meiotic error resulting in seedless varieties.

The superiority of the F1 hybrid in performance over its parents is called heterosis or hybrid vigour.

Johannsen in 1903 coined the word pureline. It is a collection of plants obtained as a result of repeated self-pollination from a single homozygous individual.

Bio-pesticides are biologically based agents used for the control of plant pests. They are in high use due to their non-toxic, cheaper and eco-friendly characteristics as compared to chemical or synthetic pesticides.