Glossary of terms used on this site
Glossary of biology.
Glossaries
Term | Main definition |
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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
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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
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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 |