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Semester Test Study Guide - M
Terms in this set (60)
The scientific study of heredity
Different forms of a gene
An organism that has two identical alleles for a trait
An organism that has two different alleles for a trait
Describes a trait that covers over, or dominates, another form of that trait.
An allele that is masked when a dominant allele is present
diagram showing the gene combinations that might result from a genetic cross
An organism's genetic makeup, or allele combinations.
An organism's physical appearance, or visible traits.
Error in meiosis in which homologous chromosomes fail to separate.
inherited characteristic that increases an organism's chance of survival
a person from whom one is descended
English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
Process by which unrelated organisms independently evolve similarities when adapting to similar environments
A species that no longer has any known living individuals.
how well an organism can survive and reproduce in its environment
The preserved remains or traces of an organism that lived in the past
a random error in gene replication that leads to a change
the formation of new and distinct species in the course of evolution.
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
The scientific study of how living things are classified
A system for giving each organism a two-word scientific name that consists of the genus name followed by the species name
A family tree that shows the evolutionary relationships thought to exist among groups of organisms
Bacteria, Archaea, Eukarya
Structures in different species that are similar because of common ancestry.
Body parts that share a common function, but not structure
remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
(1707-1778) Founder of taxonomy, the branch of biology concerned with naming and classifying organisms. Developed two part system of naming organisms.
a key for the identification of organisms based on a series of choices between alternative characters
The name given to each species, consisting of its genus and its species label
A group of individuals that belong to the same species and live in the same area
Movement of individuals into a population
movement of individuals out of a population
Growth pattern in which the individuals in a population reproduce at a constant rate
growth pattern in which a population's growth slows and then stops following a period of exponential growth
An animal that hunts other animals for food
an animal that is hunted and killed by another for food
A relationship in which one organism lives on or in a host and harms it.
A relationship between two species in which both species benefit
A relationship between two organisms in which one organism benefits and the other is unaffected
A biological community of interacting organisms and their physical environment.
living parts of an ecosystem
Nonliving components of environment.
Place where an organism lives
An organism's particular role in an ecosystem, or how it makes its living.
area near equator - warm year round
the north or south pole and its surrounding area
moderate climate zone between the polar zones and the tropics
a broad, regional type of ecosystem characterized by distinctive climate and soil conditions and a distinctive kind of biological community adapted to those conditions.
Ground that is permanently frozen
Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere.
An organism that makes its own food
An organism that cannot make its own food.
A consumer that eats only plants.
A consumer that eats only animals.
An animal that eats both plants and animals
An organism that breaks down wastes and dead organisms
the variety of life in the world or in a particular habitat or ecosystem.
overuse of species with economic value--a factor in species extinction
Protecting and preserving natural resources and the environment
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