Another useful element of an answer here is “Quite a lot of them don’t.” Any explanation for “why plants grow tall” that implies that mosses and water-lilies should be as tall as redwoods, is proving too much. A good explanation for plant height needs to predict both that redwoods grow talland that water-lilies lie flat.
Another useful element of an answer here is “Quite a lot of them don’t.” Any explanation for “why plants grow tall” that implies that mosses and water-lilies should be as tall as redwoods, is proving too much. A good explanation for plant height needs to predict both that redwoods grow tall and that water-lilies lie flat.