Terms in this set (22)
Change in the genetic composition of a population during successive generations, often resulting in the development of new species.
The process in nature by which, organisms that are better adapted to their environment tend to survive longer and transmit more of their genetic characteristics to succeeding generations than do those that are less well adapted.
Human intervention in animal or plant reproduction or survival to allow only individuals with desirable traits to reproduce.
the deliberate modification of the characteristics of an organism by manipulating its genetic material.
Change or adjustment in structure or habits by which a species becomes better able to function in its environment, occurring through the course of evolution by means of natural selection.
The existence within a species or other group of organisms of differences in form, function, or behavior,especially when hereditary.
the termination of an organism or of a group of organisms (taxon), normally a species.
DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.
the total number of fossils that have been discovered, as well as to the information derived from them.
an example of an organ or bone that appears in different animals, underlying anatomical commonalities demonstrating descent from a common ancestor.
compares and contrasts embryos of different species.
A structure in an organism that has lost all or most of its original function in the course of evolution, such as human appendixes.
The specific area where an organism inhabits. (ecology) The role or function of an organism or species in an ecosystem.
English naturalist who wrote "On the Origin of Species." He developed a theory of evolution based on natural selection
There must be variation for the particular trait within a population.
The variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).
Individuals with one version of the trait must produce more offspring than those with a different version of the trait.
Needs of species influencing adaptation and in turn - evolution
Evidence of evolution
Types of adaptation
Natural Selection v. Mutation
Natural selection is not random - Nature 'selects' the organisms most fit. These organisms survive and multiply passing on their genetic information. It happens over a long period of time
Mutation is random and the source of allele variation
Why species may go extinct
Inability to adapt quickly enough to keep up which changing influential factors
Lack of genetic diversity
Natural Selection v. Selective Breeding
natural selection happens naturally, but selective breeding only occurs when humans intervene.
Selective Breeding and. Genetic Engineering
Artificial selection selects for traits already present in a species, whereas genetic engineering creates new traits.