Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Microbes in Human Welfare of Biology.
61
Rotenone is
[1]
A bioherbicide
[2]
A natural insecticide
[3]
An insect hormone
[4]
A natural herbicide
Answer: A natural insecticide
62
The most common fungal partners of mycorrhiza are ______ species
63
A hybrid where the cytoplasm of two parent cells are fused by retaining only one parental nucleus is called
[1]
Asymmetric somatic hybrid
[2]
Symmetric somatic hybrid
[3]
An interbreed
[4]
Cybrid
Answer: Cybrid
64
Streptokinase used as a ‘clot buster’ for removing clots from blood vessels of
patients who have undergone myocardial infraction infection leading to heart attack is obtained from
[1]
Streptobacillus
[2]
Saccharomyces
[3]
Thiobacillus
[4]
Sreptococci
Answer: Sreptococci
65
The excreta of cattle, commonly called ‘gobar’ is rich in
[1]
Methanobacterium
[2]
Pseudomonas putida
[3]
Rhizobium
[4]
Bacillus species
Answer: Methanobacterium
66
The biological control of agricultural pests, unlike chemical control is