Low-grade ores are undesirable because extracting the metals ...

[folubunmi]

Low-grade ores are undesirable because extracting the metals requires more energy per pound than high-grade ores.
 
  Indicate whether the statement is true or false

Question 2

Human cells obtain energy by
 
  A) oxidizing carbohydrates.
  B) reducing proteins.
  C) reducing carbon dioxide.
  D) absorbing sunlight.

[brbarasa]

Answer to Question 1

TRUE

Answer to Question 2

A

[folubunmi]

Thank you!

[brbarasa]

Always glad to help...