The enzymes that act inside the small intestine are amylase, protease, and lipase. Amylase acts on starch and breaks it down into small carbohydrate molecules. Protease acts on proteins and breaks them down into amino acids. Lipase breaks down dietary fats into smaller molecules called fatty acids and glycerol.
Sandhill Cranes mate for life, choosing their partners based on dancing displays. Displaying birds stretch their wings, pump their heads, bow, and leap into the air. Although each female usually lays two eggs, only one nestling typically survives to fledge.
Many cephalopods have short lifespans and will reproduce only once in the 2 years they are thought to live. Mating occurs face to face by the male placing sperm via a long modified arm, called a hectocotylus, in a pouch below the femaleâs mouth. Once fertilized the female will lay many eggs and probably die afterwards.