BIO 102 Lecture Notes - Lecture 31: Yolk Sac, Amniote, Blastula
Document Summary
Development: the process by which an organism proceeds from fertilized egg through adulthood to eventual death. Differentiate: the process whereby a cell becomes specialized in structure and function. Direct development: a developmental pathway in which the offspring is born as a miniature version of the adult and does not radically change in body form as it grows and matures. Indirect development: a developmental pathway in which an offspring goes through radical changes in body form as it matures. Yolk: protein or lipid rich substances contained in eggs that provide food for the developing embryo. Yolk sac: one of the embryonic membranes of reptiles (including birds) and mammals contains stored food. Larva: an immature form of an animal that subsequently undergoes metamorphosis into its adult form; includes the caterpillars of moths and butterflies, the maggots of flies, and the tadpoles of frogs and toads.
