Pearson, as an active contributor to the biology learning community, is pleased to provide free access to the Classic edition of The Biology Place to all educators and their students. The purpose of the activities is to help you review material you have already studied in class or have read in your text. Some of the material will extend your knowledge beyond your classwork or textbook reading. At the end of each activity, you can assess your progress through a Self-Quiz. To describe structure and function of enzymes, click on an activity title.
Concept 1: How Do Restriction Enzymes Work? Concept 11: Allelic Frequency vs. Concept 3: How Do Guard Cells Function? Concept 5: The Genetic Code: RNA vs. The precocious development of sexual maturity in a larva. The retention in an adult organism of the juvenile features of its evolutionary ancestors. The scientific study of fossils. In vertebrates, a small, complex gland located between the stomach and the duodenum, which produces digestive enzymes and the hormones insulin and glucagon.
The supercontinent formed near the end of the Paleozoic era when plate movements brought all the land masses of Earth together. Pertaining to a taxon that excludes some members that share a common ancestor with members included in the taxon. An organism that absorbs nutrients from the body fluids of living hosts. Four endocrine glands, embedded in the surface of the thyroid gland, that secrete parathyroid hormone and raise blood calcium levels. Members of the subkingdom of animals consisting of the sponges. A relatively unspecialized plant cell type that carries most of the metabolism, synthesizes and stores organic products, and develops into more differentiated cell types. A type of reproduction in which females produce offspring from unfertilized eggs. The diffusion of a substance across a biological membrane. An organism or a virus that causes disease.
The ordering of cells into specific three-effect of enzyme concentration on reaction rate lab report structures, an essential part of shaping an organism and its individual parts during development. A family tree describing the occurrence of heritable characters in parents and offspring across as many generations as possible. The area of the ocean past the continental shelf, with areas of open water often reaching to very great depths. In genetics, the proportion of individuals with a particular genotype that show the phenotype ascribed to that genotype. The covalent bond between two amino acid units, formed by condensation synthesis.
A type of polymer in bacterial cell walls consisting of modified sugars cross-linked by short polypeptides. The interpretation of sensations by the brain. A plant that lives for many years. A layer of cells just inside the endodermis of a root that may become meristematic and begin dividing again. The protective coat that replaces the epidermis in plants during secondary growth, formed of the cork and cork cambium. The sensory and motor neurons that connect to the central nervous system. Rhythmic waves of contraction of smooth muscle that push food along the digestive tract. A membrane that lines the body cavity and forms the external covering of the visceral organs.
A microbody containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide. The stalk of a leaf, which joins the leaf to a node of the stem. An approach to taxonomy based entirely on measurable similarities and differences in phenotypic characters, without consideration of homology, analogy, or phylogeny. The physical and physiological traits of an organism. A small, volatile chemical signal that functions in communication between animals and acts much like a hormone in influencing physiology and behavior. The portion of the vascular system in plants consisting of living cells arranged into elongated tubes that transport sugar and other organic nutrients throughout the plant. A functional group important in energy transfer. Molecules that constitute the inner bilayer of biological membranes, having a polar, hydrophilic head and a nonpolar, hydrophobic tail.