Microbes as Biocontrol Agents and Biofertilizers

A nonphotosynthetic aerobic nitrogen fixing soil bacterium is -

Define Bioaccumulation.

Bioaccumulation and biomagnification are two terms commonly used for _____ toxicity.

Fill in the blank with the correct option from the bracket.

Organisms that fix nitrogen in aquatic habitats are _____.(green algae, cyanobacteria, Protozoa, diatoms)

The essential elements for the activation of nitrogen fixation in microorganisms are

_____ have red pigment in their roots. (Radish, Mustard, Soyabean, Maize)

Identify the biofertilizers

Mycorrhiza is a symbiotic association between fungi and plants.

Bacillus thuringiensis is used as a biopesticide in the form of spore.

The substances containing living microorganisms which help to increase the soil nutrients are called

A bacterium found in root nodules of legume plants is _____ (rhizobium/azotobacter)

Which of the following are not biopesticides?

To convert atmospheric nitrogen into organic compounds by micro-organisms is called _____nitrogen fixation.

Nitrogen fixation is shown by prokaryotes and not by eukaryotes.

The biological agents (organisms) which can be used to kill or check the proliferation of disease-causing agents are called_____.

Nosema locustae is a _____ type of microorganism used as a biocontrol agent for grasshopper, caterpillar, etc.

Biocontrol agents are used in agriculture to prevent plant diseases and destruction due to pests.

Mycoplasma and Rhizobium in the infectious stages are pleomorphic.

From the spores of Bacillus thuringiensis bacterium, an insecticidal crystal _____is synthesised which is used to kill some insects.

Excellent biocontrol agents to treat ecologically sensitive areas