Which best describes two ways in which hydrogen is involved in photosynthesis? a) 1 - hydrogen is stored in leaves of plants. 2 - hydrogen combines with carbon dioxide to make glucose. b)1 - hydrogen is stored in leaves of plants. 2 - hydrogen combines with oxygen to make water. c)1 - hydrogen enters plants as a component of water. 2 - hydrogen combines with carbon dioxide to make glucose. d)1 - hydrogen enters plants as a component of water. 2 - hydrogen combines with oxygen to make carbon dioxide.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.