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