Synthetic organic compounds have originated relatively recently; ...

[lunatika]

Synthetic organic compounds have originated relatively recently; many of them have come into use in the last 10 to 15 years.
 
  Indicate whether the statement is true or false

Question 2

In general, how many years does it take to breed a new variety of a grass, such as sorghum, to resist
  the changing individuals of a given pest?

 
 

a. 3 to 10 c. 5 to 10
  b. 8 to 11 d. 2 to 4

[Danny Ewald]

Answer to Question 1

False

Answer to Question 2

B

[lunatika]

YES! Correct, THANKS for helping me on my review

[nguyenhoanhat]

Thanks for the timely response, appreciate it