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For students in search of
- Hydroponic Gardening
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Guides - Basics to Experts level
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Growing fruit and vegetables hydroponically
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Practical daily questions or queries of hydroponics lovers
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Current Hydroponics and Indoor Gardening Market Growth as well as Trends
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41. |
In 1948, V.S. Chardakov who devised a simple and efficient method to determine the test solution in which no change in concentration occurs was: |
A. |
Austrian Scientist |
B. |
American Scientist |
C. |
Bulgarian Scientist |
D. |
Russian Scientist |
Answer: Option D
Explanation:
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42. |
The ultra-structure of cell can be best studied by: |
A. |
Autoradiography |
B. |
X-ray diffraction method |
C. |
Phase contrast microscope |
D. |
None of these |
Answer: Option D
Explanation:
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43. |
An apparatus for measuring transpiration in plants is called: |
A. |
Auxanometer |
B. |
Potometer |
C. |
Hygrometer |
D. |
Lactometer |
Answer: Option B
Explanation:
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44. |
In unisexual plants sex can be changed by application of: |
A. |
Auxins |
B. |
ABA |
C. |
Ethanol |
D. |
Cytokinins |
Answer: Option A
Explanation:
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45. |
A free-living anaerobic bacterium capable of N2 fixation in soil is: |
A. |
Azotobacter |
B. |
Streptococcus |
C. |
Clostridium |
D. |
Rhizobium |
Answer: Option C
Explanation:
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46. |
Except which one, all other processes help in adding nitrogen to soil: |
A. |
Bacterial decay of animal remains |
B. |
Electric lightning |
C. |
Addition of lime in soil |
D. |
Nitrogen fixing bacteria |
Answer: Option C
Explanation:
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47. |
Which of the following plants cannot fix atmosphere nitrogen directly? |
Answer: Option B
Explanation:
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48. |
Whose technique is employed for the extraction and elimination of hormones? |
Answer: Option C
Explanation:
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49. |
A natural growth regulator (hormone) is: |
A. |
Benzaldehyde |
B. |
2, 4-D |
C. |
N.A.A. |
D. |
Ethylene |
Answer: Option D
Explanation:
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50. |
The action of ethylene is effectively inhibited by ______ ion. |
Answer: Option D
Explanation:
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