A protein made in response
to a specific antigen that can attach to
the antigen and cause it to be useless.
Elastic, muscular organ that
holds urine until it leaves the body
through the urethra.
Nonliving, physical features of
the environment, including air, water,
sunlight, soil, temperature, and climate.
Part of Earth that supports
life, including the top portion of Earth's
crust, the atmosphere, and all the water
on Earth's surface.
An alternate form that a gene
may have for a single trait; can be
dominant or recessive.
Nutrient that usually is
the body's main source of energy.
Microscopic blood vessel
that connects arteries and veins, has
walls one cell thick, through which
nutrients and oxygen diffuse into body
cells and waste materials and carbon
dioxide diffuse out.
Forceful behavior, such as
fighting, used by an animal to control or
dominate another animal in order to
protect young, defend
territory, or get food.
A type of
reproduction--fission, budding, and
regeneration--in which a new organism
is produced from one parent and has
DNA identical to the parent.
Lung disorder in which the
bronchial tubes contract quickly and
cause shortness of breath, wheezing, or
coughing; may occur as an allergic
reaction.
Largest number of
individuals of a particular species that an
ecosystem can support over time.
Any organism that is able to
live without oxygen.
Flowering vascular
plants that produce a fruit containing one
or more seeds; monocots and dicots.
Tough, flexible tissue that
joins vertebrae and makes up all or part
of the vertebrate endoskeleton.
Large geographic areas with
similar climates and ecosystems;
includes tundra, taiga, desert, temperate
deciduous forest, tropical and temperate
rain forest, and grassland.