Glossary of terms used on this site

parental generation in a cross

reaction center of photosystem II

reaction center of photosystem I

encapsulated mechanoreceptor in the skin that responds to deep pressure and vibration

ratites; flightless birds, including ostriches and emus

study of life’s history by means of fossils

leaf type with leaflets that emerge from a point, resembling the palm of a hand

genus of chimpanzees and bonobos

gland that secretes digestive juices

organ located between the stomach and the small intestine that contains exocrine and endocrine cells

widespread, usually worldwide, epidemic disease

one of the small bump-like projections from the tongue

inversion that occurs outside the centromere

signal between nearby cells that is delivered by ligands traveling in the liquid medium in the space between the cells

thyroid cell that produces the hormone calcitonin