Berry (botany) in fruit type may have led to the evolution of fruit eating in mammals and birds. Fruit type has been considered to be a useful character in classification and in understanding the phylogeny of plants. The evolution of fruits with a berry-like pericarp has been studied in a wide range of flowering plant families. Repeated transitions between fleshy and dry pericarps have been demonstrated regularly. One well-studied family is the Solanaceae, because of the commercial importance of fruit such as tomatoes, bell peppers, and eggplants or aubergines. Capsules, which are dry dehiscent fruits, appear to be the original form of
Fruit preserves can be easily verified by searching the listings under "fruit spread" on common web sites, such as those of Amazon or Walmart, or to look at the ingredient list and nutritional information on specific fruit spread products. Jam typically contains both the juice and flesh of a fruit or vegetable, although one cookbook defines it as a cooked and jelled puree. The term "jam" refers to a product made of whole fruit cut into pieces or crushed, then heated with water and sugar to activate its pectin before being put into containers: Pectin is mainly D-galacturonic acid connected by α