Vocabulary Flashcards
part of the arthropod’s body that is behind the thorax.
abdomen
nonliving factor in an ecosystem, such as moisture, temperature, wind, sunlight, soil, and minerals.
abiotic
four common blood types (A, B, AB, O) and the protein markers that distinguish them.
ABO blood group
process by which nutrients move out of one system and into another.
absorption
depth of the ocean that lies below 2000 meters and is in complete darkness.
abyssal zone
compound that donates a proton (H+) when dissolved in a solution.
acid
precipitation produced when pollutants in the atmosphere cause the pH of rain the decrease.
acid rain
condition characterized by having several infections and very few T cells.
Acquired Immune Deficiency Syndromes (AIDS)
filament that is pulled by myosin filaments to cause muscle contractions.
actin
fast, moving change in electrical charge across a neuron’s membrane; also called an impulse.
action potential
energy input necessary to initiate a chemical reaction.
activation energy
immunity that occurs after the body responds to an antigen.
active immunity
energy-requiring movement of molecules across a region of a lower concentration to a region of higher concentration.
active transport
inherited trait that is selected for over time because it allows organisms to better survive in their environment.
adaption
process by which one species evolves and gives rise to many descendant species that occupy different ecological niches.
adaptive radiation
uncontrollable physical and mental need for something.
addiction
low-energy molecule that can be converted to ATP.
Adenosine Diphosphate (ADP)
high-energy molecule that contains, within its bonds, energy that cells can use.
Adenosine Triphosphate (ATP)
attraction between molecules of different substances.
adhesion
period of life beginning at puberty and ending at adulthood.
adolescence
period of life when a person is fully developed and physical growth stops.
adulthood
process that required oxygen to occur.
aerobic
surface, such as a bird’s wing, whose shape moves air faster over the top than underneath it, allowing for flight.
airfoil
air-filled space that connects a bird’s lung, aiding in breathing.
air sac
photosynthetic plantlike protists.
algae
chemical produced by plants that contains nitrogen, many of which are used in medicines.
alkaloid
any of the alternative forms of a gene that occurs at a specific place on a chromosome.
allele
proportion of one allele, compared with all the alleles for that trait, in the gene pool.
allele frequency
antigen that does not cause disease but still produces an immune response.
allergen