8) If a substance measures 7 on the pH scale, that substance
A) has equal concentrations of H+ and OH-ions.
B) may be lemon juice.
C) has a higher concentration of OH- than H+ ions.
D) probably lacks OH-ions.
E is basic.

Nitrofurantoin used during the fifth week of pregnancy places the neonate at risk for which condition?

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.