The function of the pollen tube is to select one: a. digest the sporophyte tissue as it elongates toward the female gametophyte. b. produce pollen. c. attract animals to the plant to spread the pollen. d. direct pollen to the megasporangium. e. eject pollen from the microsporangium.

The right option is a. digest the sporophyte tissue as it elongates toward the female gametophyte. The pollen tube transports sperm cells from the pollen grain, from the stigma to the ovules at the base of the pistil containing the female gametophyte.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.