- Home
- Standard 12
- Biology
8.Microbes in Human Welfare
normal
Which one of the following is correct?
A
Herbicides kill plant mostly by blocking $PS-II$ (photolysis of water) and occasionally phloem transport
B
Insecticides kill insects mostly through impairment of nerve conduction and sometimes through respiratory arrest
C
Both $(a)$ and $(b)$
D
None of the above
Solution
Herbicides kill weeds and unwanted plants in cultivated land. Insecticides are those chemicals that destroy or kill insects. Herbicides kill plant mostly by blocking $PS-II$ and occasionally phloem transport. Insecticides kill insects mostly through impairment of nerve conduction and sometimes through respiratory arrest.
Standard 12
Biology
Similar Questions
Match the columns :
| Column – $I$ | Column – $II$ |
| $(a)$ Aspargillas Nizer | $(1)$ Lactic acid |
| $(b)$ Aceto bacter aciti | $(2)$ Citric acid |
| $(c)$ Clostridium butiricum | $(3)$ Acetic acid |
| $(d)$ Lacto bacillus | $(4)$ Buteric acid |
normal
