TN State Board Samacheer Kalvi Online Test for 12th Std - Bio Botany - English - Plant Breeding

Question 1 Of 10

Desired improved variety of economically useful crops are raised by

Natural selection hybridization mutation biofertilisers

Question 2 Of 10

A Wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in

iron carbohydrates proteins vitamins

Question 3 Of 10

Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems and ability to grow in the sugarcane belt of North India?

Saccharum robustum and Saccharum officinarum Saccharum barberi and Saccharum officinarum Saccharum sinense and Saccharum officinarum Saccharum barberi and Saccharum robustum

Question 4 Of 10

Match column I (crop) with column II (Corresponding disease resistant variety) and select the correct option from the given codes.

I-(ii), II-(i), IH-(iii), IV-(iv)

Question 5 Of 10

Dwarfing gene of wheat is

pal 1 Atomita 1 Norin 10 pelita 2

Question 6 Of 10

Importing better varieties and plants from outside and acclimatising them to local environment is called

cloning heterosis selection introduction

Question 7 Of 10

While studying the history of domestication of various cultivated plants ………………. were recognized earlier.

Centres of origin Centres of domestication Centres of hybrid Centres of variation

Question 8 Of 10

Pick out the odd pair …………..

Mass selection – Morphological characters Purline selection – Repeated self pollination Clonal selection — Sexually propagated Natural selection – Involves nature

Question 9 Of 10

Which of the following is incorrectly paired?

Wheat – Himgiri Milch breed – Sahiwal Rice – Ratna Pusa Komal – Brassica

Question 10 Of 10

Plants having similar genotypes produced by plant breeding are called

clone haploid autopolyploid genome

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Bio Botany - English Medium - Plant Breeding

Samacheer Kalvi 12th Bio Botany - Plant Breeding - Book Back Questions in English Medium