Glossary of terms used on this site
Glossary of biology.
Glossaries
Term | Main definition |
---|---|
r-selected species | Glossaries - Biology glossary species suited to changing environments that produce many offspring and provide little or no parental care |
radial cleavage | Glossaries - Biology glossary |
radial glia | Glossaries - Biology glossary |
radial symmetry | Glossaries - Biology glossary type of symmetry with multiple planes of symmetry, with body parts (rays) arranged around a central disk |
radiation hybrid mapping | Glossaries - Biology glossary information obtained by fragmenting the chromosome with x-rays |
radicle | Glossaries - Biology glossary original root that develops from the germinating seed |
radioisotope | Glossaries - Biology glossary |
radioresistant | Glossaries - Biology glossary organism that grows in high levels of radiation |
radius | Glossaries - Biology glossary |
radula | Glossaries - Biology glossary tongue-like organ with chitinous ornamentation |
raphe | Glossaries - Biology glossary slit in the silica shell of diatoms through which the protist secretes a stream of mucopolysaccharides for locomotion and attachment to substrates |
reaction center | Glossaries - Biology glossary complex of chlorophyll molecules and other organic molecules that is assembled around a special pair of chlorophyll molecules and a primary electron acceptor; capable of undergoing oxidation and reduction |
reading frame | Glossaries - Biology glossary sequence of triplet codons in mRNA that specify a particular protein; a ribosome shift of one or two nucleotides in either direction completely abolishes synthesis of that protein |
reception | Glossaries - Biology glossary |
receptive field | Glossaries - Biology glossary region in space in which a stimulus can activate a given sensory receptor |