Pollen vs Theca - What's the difference?
pollen | theca |
Fine powder in general, fine flour (16th century usage documented by OED; no longer common.)
* "...and ther was good wyne of Gascoyne,... as well of pollen, as of other vitailes..." Froissart, Jean, 1338?-1410?; Berners, John Bourchier, Lord [https://archive.org/details/chroniclefroiss00froigoog]
A fine granular substance produced in flowers. Technically a collective term for pollen grains (microspores) produced in the anthers of flowering plants. (This specific usage dating from mid 18th century.)
* {{quote-magazine, year=2013, month=May-June, author=
, title= (biology) Any external case or sheath.
(botany) The pollen producing organ usually found in pairs and forming an anther.
(medicine) The twin layers of cells surrounding the basal lamina of an ovarian follicle
(microbiology, planktology) The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates
(coral science) The calcareous wall of a corallite, the exoskeleton of a coral polyp
As nouns the difference between pollen and theca
is that pollen is while theca is (biology) any external case or sheath.pollen
English
(wikipedia pollen)Noun
(en-noun)- (Bailey)
Katrina G. Claw
Rapid Evolution in Eggs and Sperm, volume=101, issue=3, magazine=(American Scientist) , passage=In plants, the ability to recognize self from nonself plays an important role in fertilization, because self-fertilization will result in less diverse offspring than fertilization with pollen from another individual.}}