Glossary of terms used on this site
Glossary of biology.
Glossaries
Term | Main definition |
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distraction display |
Glossaries - Biology glossary
visual display used to distract predators away from a nesting site |
divergent evolution |
Glossaries - Biology glossary
process by which groups of organisms evolve in diverse directions from a common point |
diversifying selection |
Glossaries - Biology glossary
selection that favors two or more distinct phenotypes |
DNA barcoding |
Glossaries - Biology glossary
molecular genetic method for identifying a unique genetic sequence to associate with a species |
DNA barcoding |
Glossaries - Biology glossary
molecular genetic method for identifying a unique genetic sequence to associate with a species |
DNA methylation |
Glossaries - Biology glossary
epigenetic modification that leads to gene silencing; a process involving adding a methyl group to the DNA molecule |
DNA microarray |
Glossaries - Biology glossary
method to detect gene expression by analyzing many DNA fragments that are fixed to a glass slide or a silicon chip to identify active genes and identify sequences |
dominant |
Glossaries - Biology glossary
|
dominant lethal |
Glossaries - Biology glossary
inheritance pattern in which an allele is lethal both in the homozygote and the heterozygote; this allele can only be transmitted if the lethality phenotype occurs after reproductive age |
dormancy |
Glossaries - Biology glossary
period of no growth and very slow metabolic processes |
dorsal cavity |
Glossaries - Biology glossary
body cavity on the posterior or back portion of an animal; includes the cranial and vertebral cavities |
dorsal hollow nerve cord |
Glossaries - Biology glossary
|
dorsiflexion |
Glossaries - Biology glossary
bending at the ankle such that the toes are lifted toward the knee |
double circulation |
Glossaries - Biology glossary
flow of blood in two circuits: the pulmonary circuit through the lungs and the systemic circuit through the organs and body |
double fertilization |
Glossaries - Biology glossary
two fertilization events in angiosperms; one sperm fuses with the egg, forming the zygote, whereas the other sperm fuses with the polar nuclei, forming endosperm |