Tag: microbes in human welfare

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Questions Related to microbes in human welfare

Multiple choice zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

Sesbania rostrate is preferred as green manure over other species because.

  1. It grows quickly

  2. It has extensive root system

  3. It possesses nodules on both stem and roots

  4. It possesses leaf nodules
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sesbania rostrate is mainly used as green manure to improve the fertility of the soil due to its fast growth, high biomass production and the ability to convert atmospheric nitrogen into a usable form for plants.

Multiple choice zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

Azolla pinnate is allowed to grow in rice fields because.

  1. It does not disturb photosynthesis of Rice plants

  2. It provides food to fish

  3. It provides aeration to standing water

  4. It contains Anabaena
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Azolla free-floating freshwater fern that harbors nitrogen-fixing cyanobacterium Anabaena azollae by symbiosis relationship in its dorsal leaves. It is capable of fixing atmospheric carbon dioxide and nitrogen and is known as a potent nitrogen fixer.

This nitrogen-fixing capacity helps the plant benefit in a positive manner with the increase in yield and size and it served as the nitrogen requirement for rice.