Download App

STD 12 - 8. microbes in human welfare — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 8. microbes in human welfare1 Mark
MCQ
Trichoderma harzianum has proved a useful microorganism for
  • A
    gene transfer in higher plants
  • ✓
    biological control of soil­borne plant pathogens
  • C
    bioremediation of contaminated soils
  • D
    reclamation of wastelands.
✓

Answer

Correct option: B.
biological control of soil­borne plant pathogens
b
(b) : The natural method of pest and pathogen control involving use of viruses, bacteria and other insects (which are their natural predators and pests) is called biocontrol or biological control. For example, free living fungus Trichoderma exerts biocontrol over several plant pathogens for the control of plant diseases. Baculoviruses (mostly of genus Nucleo­ polyhedrovirus) are also used as biocontrol agents but they are used for the control of insects and arthropods. Bacillus thuringiensis is a soil bacterium which is used as biopesticide. Glomus species are the most common fungal partners of mycorrhiza residing in the roots of higher plants.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from STD 12 - 8. microbes in human welfare→STD 12 - 8. microbes in human welfare — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Cells become variable in morphology and function in different regions of the embryo. The process is
→
Ultraviolet radiations from sunlight cause a reaction which produces.
→
That segment of $\text{DNA}$ which transcribes the $\text{RNA},$ is called :
→
$A$ : Shivering is an adaptation for low temperature.
$R$ : Shivering warms up the body
→
In which field has the technology of biotechnology been used the most?
→
What is the marriageable age for the females and males respectively in India?
→
Succession showing changes in communities at a place is called:
→
Deep black soil is productive due to high proportion of:
→
Multi cellular organisms such as worms cause which disease.
→
How many types of gametes may be produced by genotype $\text{DdEeFf}\ ?$
→