The history of life has been punctuated by several mass extinctions. for example, the impact of a meteorite may have wiped out most of the dinosaurs and many forms of marine life at the end of the cretaceous period (see chapter 23). fossils indicate that plants were less severely affected by this mass extinction. what adaptations may have enabled plants to withstand this disaster better than animals?

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.

He used pea plants to study the patterns of heredity.