A substance That is produced by a plant and affects how it grow and develops is called

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

What is the most appropriate method of gaining weight (muscle mass)

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?