Hormones are chemicals that generally
a. increase energy metabolism.
b. transmit nerve impulses.
c. accelerate chemical reactions in cells without being consumed in the reaction.
d. circulate in fluids from regulators to target cells.
e. cand d only.

a

explanation:

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.