12th Bio Botany one marks - Lesson 9 - Online Test

#1. Assertion: Genetic variation provides the raw material for selection. Reason: Genetic variations are differences in genotypes of the individuals.

Assertion is right and reason is wrong.

Assertion is wrong and reason is right.

Both reason and assertion is right.

Both reason and assertion is wrong.

#2. While studying the history of domestication of various cultivated plants recognized earlier.

Centres of origin

Centres of domestication

Centres of hybrid

Centres of variation

#3. Pick out the odd pair.

Mass selection – Morphological characters

Purline selection – Repeated self pollination

Clonal selection – Sexually propagated

Natural selection – Involves nature

#4. The quickest method of plant breeding is __________

Introduction

Selection

Hybridization

Mutation breeding

#5. Desired improved variety of economically useful crops are raised by __________

natural selection

hybridization

mutation

biofertilisers

#6. Plants having similar genotypes produced by plant breeding are called __________

clone

haploid

autopolyploid

genome

#7. Importing better varieties and plants from outside and acclimatising them to local environment is called __________

cloning

heterosis

selection

introduction

#8. Dwarfing gene of wheat is __________

pall

Atomita 1

Norin 10

pelita 2

#9. Crosses between the plants of the same variety are called __________

interspecific

intervarietal

intravarietal

intergeneric

#10. Progeny obtained as a result of repeat self pollination a cross pollinated crop to called __________

pure line

pedigree line

inbreed line

heterosis

#11. Jaya and Ratna are the semi dwarf varieties of __________

wheat

rice

cowpea

mustard

#12. 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

#13. A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in __________

iron

carbohydrates

proteins

vitamins

#14. Which of the following is incorrectly paired?

Wheat – Himgiri

Milch breed – Sahiwal

Rice – Ratna

Pusa Komal – Brassica

#15. Which is not a free-living nitrogen-fixing species?

Azotobacter

Clostridium

Nostop

Anabaena

M	T	W	T	F	S	S
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

12th Bio Botany one marks – Lesson 9 – Online Test | Plant Breeding