Biology glossary

individual with an error in chromosome number; includes chromosome segment deletions and duplications

condition of a cell having an extra chromosome or missing a chromosome for its species

pain caused by partial blockage of the coronary arteries by the buildup of plaque and lack of oxygen to the heart muscle

enzyme that converts angiotensin I to angiotensin II

product in the renin-angiotensin-aldosterone pathway

molecule that affects different organs to increase blood pressure

produced when the angle between the bones of a joint changes

negative ion that is formed by an atom gaining one or more electrons

phylum of vermiform animals with metamerism

without oxygen

pigment molecule that directly absorbs light and transfers the energy absorbed to other pigment molecules

portion of the pituitary gland that produces six hormones; also called adenohypophysis

sac-like structure at the tip of the stamen in which pollen grains are produced

male gametangium

phylum to which angiosperms belong