Multiple Choice Questions

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What happened when we inoculated Rhizobium in wheat field?

  • No increase in production (nitrogen content of soil remains same)

  • A lot of increase in production (nitrogen content of soil increases)

  • Fertility of soil decreases

  • Fertility of soil increases


A.

No increase in production (nitrogen content of soil remains same)

Rhizobium species is symbiotic nitrogen- fixing bacteria, which occurs in root nodules of legumes. When we inoculated Rhizobium in wheat field, there is no increase in production. Because wheat has no root nodules for fixing nitrogen content. Therefore, nitrogen content of soil will remain same.


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Number of chromosomes in an angiospermic plant is 14, then the number of chromosomes in synergid cells will be

  • 14

  • 7

  • 28

  • 21


The mineral present in cell wall is

  • Na

  • Ca

  • K

  • Mg


Meristematic tissue in vascular bundle is

  • phellem

  • procambium

  • interfascicular cambium

  • fascicular cambium


Phytochrome is present in

  • vascular cryptogam

  • prokaryotes

  • flowering plants

  • algae


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Which of the following plant is LDP?

  • Xanthium

  • Soybean

  • Wheat

  • Tobacco


Vessels and companion cells are found in

  • angiosperm

  • pteridophytes

  • bryophytes

  • thallophytes


Male gamete in angiosperm is produced by

  • generative cell

  • microspore cell

  • vegetative cell

  • tube cell


Which organelle is present in higher number in secretory cells?

  • Dictyosome

  • ER

  • Lysosome

  • Vacuole


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Systema Naturae was written by

  • Linnaeus

  • Aristotle

  • Hippocrates

  • Darwin