Q. 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
Explanation
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.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.