Many commercial pesticides become less effective after two to three years because:
A) the chemicals mutate.
B) pests with resistant genes will survive and reproduce.
C) new pests invade the area.
D) pests without resistant genes will ignore any plant coated with pesticide.
Answer: B
You might also like to view...
The primer for retrovirus reverse transcription is a specific
A) tRNA encoded by the cell. B) tRNA encoded by the virus. C) nuclear tRNA. D) nuclear tDNA.
How can the influenza virus infect individuals who have been previously infected and therefore produce antibodies
against this virus?
What will be an ideal response?Which of the following statements concerning
production of bryophyte reproductive cells is true? a. Spores and gametes are produced by meiosis. b. Spores and gametes are produced by mitosis. c. Spores are produced by meiosis, whereas gametes are produced by mitosis. d. Spores are produced by mitosis, whereas gametes are produced by meiosis. e. Spores and gametes are both used for sexual reproduction.
Seasonal fluctuations in atmospheric carbon dioxide concentrations are greater in the Northern Hemisphere than in the Southern Hemisphere
Indicate whether the statement is true or false