Question 2 of 7 Which substance do plants use to make sugars? O A. Oxygen B. Ammonia O C. Nitrates O D. Carbon dioxide

The zone, which exists from a depth of 0 to 600 feet, is home to the majority of ocean life.

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.