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Biology 12 Ch-27 BIOLOGY AND HUMAN WELFARE- 27
1.
Which of the following eatable has been introduced in Asia?
Tea
Coffee
All of these
Apple
2.
Which of the following eatable has been introduced in Asia?
Ground nut
Tobacco
All of these
Tea
3.
What is the important step in all breeding experiments?
Husbandry
Backcross
Hybridization
Selection
4.
Since when, selection has been practiced by man?
Since 15th century
Since 21th century
Since 19th century
Since early ages
5.
What is picking up the better ones out of the entire crop plants called?
Husbandry
Backcross
Selection
Hybridization
6.
How many are the patterns of selection?
Four
Three
One
Two
7.
Which of the following are the patterns of selection?
Mass selection
All of these
Clonal selection
Single plant selection
8.
Which of the following are the patterns of selection?
Pure line selection
All of these
Mass selection
Clonal selection
9.
What is the most common method of crop selection?
Mass selection
Single plant selection
Clonal selection
Pure line selection
10.
What is the most common & old method of crop selection?
Mass selection
Clonal selection
Single plant selection
Pure line selection
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