PLZ HELP 8. What are substances that release hydrogen ions called? What about more hydroxide ions?

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?