Biology glossary

group of cells separated by small spaces that form from the mesoderm and give rise to connective tissue

clusters of algal cells and mycelia that allow lichens to propagate

organ that produces photosynthate for a plant

point of origin of a river or stream

DNA transfer from a gel to a nylon membrane

formation of a new species

group of populations that interbreed and produce fertile offspring

(also, species distribution pattern) spatial location of individuals of a given species within a habitat at a particular point in time

species richness

relationship between area surveyed and number of species encountered; typically measured by incrementally increasing the area of a survey and determining the cumulative numbers of species

relationship between area surveyed and number of species encountered; typically measured by incrementally increasing the area of a survey and determining the cumulative numbers of species

the amount of heat one gram of a substance must absorb or lose to change its temperature by one degree Celsius

instrument that can measure transmitted light and compute the absorption

specialized sac that stores sperm for later use

process of producing haploid sperm