What's the difference between foraminifer and foraminifera?
Foraminifer
Definition:
(n.) One of the foraminifera.
Example Sentences:
(1) After treatment of cells of the foraminifer Allogromia laticollaris Arnold (protozoa, rhizopoda) with the volatile anesthetic halothane in concentrations of more than 1 mM no cytoplasmic microtubules are demonstrable.
(2) The motility of this cold-adapted foraminifer therefore appears fully comparable to the motility of allogromiid foraminifers from temperate waters.
(3) These two classes of macromolecules are also present in the shells of a foraminifer and in various mollusks, both of which are formed by the "organic matrix-mediated" biomineralization process.
(4) Transient shape changes of organelles translocating along microtubules are directly visualized in thinly spread cytoplasmic processes of the marine foraminifer.
(5) Electron microscopic investigations on the foraminifer Allogromia laticollaris showed that after treatment with 10(-3) M vinblastine tubulin paracrystals can be demonstrated in intermitotic nuclei.
(6) Cytoskeletal inhibitors were used as probes to test the involvement of microtubules and actin microfilaments in the development, motility, and shape maintenance of the pseudopodial networks (i e, reticulopodia) of the foraminifers Allogromia sp strain NF and Allogromia laticollaris.
(7) We summarize our recent immunocytochemical characterization of the reticulopodial cytoskeleton of two allogromiid foraminifers and our pharmacologic dissection of its motility.
Foraminifera
Definition:
(n. pl.) An extensive order of rhizopods which generally have a chambered calcareous shell formed by several united zooids. Many of them have perforated walls, whence the name. Some species are covered with sand. See Rhizophoda.
Example Sentences:
(1) In a study of the rate of production of four species of planktonic Foraminifera in the region of the California Current it was found that their life spans are of the order of 1 month.
(2) The shared possession of nuclear dimorphism with non-dividing macronuclei, conjugation, and a putative heterophasic ancestry invites further investigation of the phylogenetic relationship between heterokaryotic foraminifera and karyorelict ciliates.
(3) Isotope ratios Obtained from fossil otoliths indicate a water temperature which agrees wiht that found by isotope measurements on associated benthonic foraminifera.
(4) The five tissues, extracellularly mineralizing algae, radial and granular foraminifera, mammalian bone, mammalian enamel, and mollusk shell nacre, probably span the entire spectrum.
(5) Two superkingdoms (= Domains: Prokaryotae and Eukaryotae) and five kingdoms (Monera = Procaryotae or Bacteria; Protoctista: algae, amoebae, ciliates, foraminifera, oomycetes, slime molds, etc.
(6) Oxygen isotopic comparisons of phenotypes of Recent Planktonic Foraminifera with both normal and diminutive final chambers are compatible with a model in which the latter develop as a response to environmental stress.
(7) The approximately 300 million years that make up Paleozoic time saw the evolution of eight of the fifteen recognized suborders of Foraminifera.
(8) Results are in contrast to previous evidence presented in favor of yearly life cycles and maturing at great depth in other species of planktonic Foraminifera.
(9) Analysis by the oxygen-isotope method of samples of benthonic Foraminifera, collected at different depths on the continental shelf and slope of western Cenitral America, yielded isotopic temperatures agreeing closely with the temperatures measured in the field.
(10) The extinction event that affects the planktonic foraminifera at 12 Ma BP cannot be chronologically correlated to this southwestern European land-mammal extinction event, because the calibration of the marine fossil record during that time-span has to be precise.
(11) In heterokaryotic agamonts of some Foraminifera, nuclear differentiation occurs at the diploid level, proved to be irreversible and caused by either deletion or stable repression of some genes.