Bio Vocab - Ch 1 Vocab Theory: A proposed explanation for a...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Ch 1 Vocab Theory: A proposed explanation for a very general class of phenomena or observations Cell: A highly organized living entity that is bounded by a thin, flexible structure called a plasma membrane and that contains concentrated chemicals in an aqueous solution Cell Theory: The theory that all organisms are made of cells and that all cells come from preexisting cells Spontaneous Generation: The disproven hypothesis that living organisms can develop spontaneously and rapidly from nonliving, noncellular materials under certain conditions Hypothesis: A proposed explanation for a phenomenon or for a set of observations Evolution: 1) The theory that all organisms on Earth are related by common ancestry and that they have changed over time, predominantly via natural selection 2) Any change in the genetic characteristics of a population over time; especially, a change in allele frequencies Natural Selection: The process by which individuals with certain heritable traits tend to produce more surviving offspring than do individuals without those traits, resulting in a change in the genetic makeup of the population. A major mechanism of evolution. Population: A group of individuals of the same species living in the same area at the same time Heritable: Refers to traits that are influenced by hereditary genetic material (DNA, or RNA for some viruses) Fitness: The ability of an organism to produce surviving fertile offspring Adaptation: A heritable trait that increases the fitness of an individual with that trait compared with individuals without it, in a certain environment Speciation: The evolution of two or more distinct species from a single ancestral species Tree of Life: A diagram depicting the genealogical relationships of all living organisms on Earth, with a single ancestral species at the base Taxonomy: The branch of biology concerned with the classification and naming of organisms Genus: A taxonomic category of closely related species. Always italicized and capitalized. Species: A distinct, identifiable group of populations that is thought to be evolutionary independent of other populations. Generally distinct from other species in appearance, behavior, habitat, ecology, genetic characteristics, etc. Binomial Nomenclature: A system of naming species by using two-part Latinized names with a genus name and a species name. Always italicized, with a genus name capitalized.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Family: A classic taxonomic rank above genus and below order. In animals, usually ends in the suffix –idea. Order: A classic taxonomic rank above the family level and below the class level. Class: A classic taxonomic rank above the order level and below the phylum level.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/06/2009 for the course BIO 225 taught by Professor Pavgi during the Spring '08 term at University of Michigan.

Page1 / 16

Bio Vocab - Ch 1 Vocab Theory: A proposed explanation for a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online