9th Grade > Biology
IMPROVEMENT IN FOOD RESOURCES MCQs
Total Questions : 56
| Page 6 of 6 pages
Answer: Option C. ->
Jersey
:
C
:
C
Foreign breeds of cow are used for breeding with indigenous breeds primarily to produce a superior breed having better qualities such as long lactation periods. Jersey and Brown Swiss are some examples of foreign breeds.
Answer: Option D. ->
1, 2 and 3
:
D
Diseases in plants can be caused by fungi, bacteria and viruses.
For example, wheat rust is fungal in origin, yellow vein mosaic of okra is caused by virus and citrus canker is a disease affecting citrus species caused by the bacterium Xanthomonas axonopodis.
:
D
Diseases in plants can be caused by fungi, bacteria and viruses.
For example, wheat rust is fungal in origin, yellow vein mosaic of okra is caused by virus and citrus canker is a disease affecting citrus species caused by the bacterium Xanthomonas axonopodis.
Answer: Option B. ->
Low maintenance requirements
:
B
:
B
The cross-breeding programs between Indian and foreign breeds of birds are focused on developing following.
i) New varieties with increased number and quality of chicks.
ii) Increased tolerance to high temperature.
iii) Low maintenance.
iv) Reduction in the size of the egg-laying bird with ability to utilise more fibrous and cheaper diets formulated using agricultural by-products.
Answer: Option A. ->
True
:
A
Crossing between two different species of the same genus is called interspecific hydridisation. It is one of the methods used to improve plant characteristics.
:
A
Crossing between two different species of the same genus is called interspecific hydridisation. It is one of the methods used to improve plant characteristics.
Answer: Option B. ->
Organic farming
:
B
The farming technique in which there is minimum or no use of chemical fertilizers, herbicides and insecticides is called organic farming. The manure used in this case is made from organic waste and is devoid of any harmful chemicals.
:
B
The farming technique in which there is minimum or no use of chemical fertilizers, herbicides and insecticides is called organic farming. The manure used in this case is made from organic waste and is devoid of any harmful chemicals.
Answer: Option C. ->
Carbon
:
C
:
C
Plants take in carbon dioxide directly from the air. Thus, carbon and oxygen are obtained directly from the air. Iron, calcium and boron are supplied to the plants through the soil.
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