What's the difference between germarium and rotifera?
Germarium
Definition:
(n.) An organ in which the ova are developed in certain Turbellaria.
Example Sentences:
(1) The germarium encloses mononucleate and binucleate trophocytes, prefollicular tissue and oogonia, while the vitellarium contains 2-5 oocytes arranged in order of maturity.
(2) At the time the 16 cell cluster becomes arranged in a lens-shaped layer laterally across the germarium, the centrioles lose their juxtanuclear position and move towards the oocyte.
(3) They were first observed in the distal part of the germarium where rings of four different size classes were found, differing in diameter by up to twofold.
(4) However, in all analysed hemipteran species (Lygus pratensis, Calocoris affinis, Graphosoma lineatum, Euscelis plebejus) the microfilament pattern was very different: while the nurse cells stained only weakly, we always found a characteristic (in some species massive) microfilament network surrounding the trophic core, a central area in the germarium from where material is transported through the trophic cords into the oocytes.
(5) In the germarium poly(A)+RNA was found to accumulate in the trophocyte cytoplasm concomitant with the maturation of these cells.
(6) Since the oocyte is connected to 15 nurse cells by a system of intercellular bridges or ring canals, the possibility that the cluster of centrioles arose in the germarium from an intercellular migration of centrioles from the nurse cells to the oocyte was analyzed in serial sections for the electron microscope.
(7) The heterocellular female gonad of the typhloplanoid Castrada viridis consists of a single germarium and two rows of vitellaria.
(8) According to the total combination of characters, size and colour of yellow bodies, presence and character of luminescence in the germarium and adjoining areas of vitellarium, the presence of "starvation bodies", "degeneration bodies" and resorpting oocytes, the state of seminal receptable, each group is divided into subgroups that enables us to make a detail description of age composition of the population under study.
(9) The telotrophic ovary of Epilachna vigintioctopunctata is composed of 32-40 ovarioles, each with an apical germarium and a basal vitellarium.
(10) Each of its 25-30 ovarioles is composed of a small terminal filament, a small germarium and a vitellarium consisting of the egg follicle.
(11) The paper is illustrated by photos and pictures of ovarioles from the moment of germarium formation to the beginning of vitellogenesis.
(12) In the fifth instar larva of E. integriceps, two zones may be seen in the germarium of the telotrophic ovariole: the apical trophocyte zone and the distal oocyte zone.
(13) In oogenesis, both cyclin A RNA and a shorter form of the cyclin B transcript are seen in the cells of the germarium that are undergoing mitosis.
(14) Evaluation of the number of anomalous thoracic macrochaetae in parallel strains of flies after heating of the oocytes during the critical periods of macrochaeta development (seven days before egg laying), i.e., the stage of oocyte formation in the germarium.
(15) The trophocyte nucleoli synthesize RNA still in germarium.
(16) Each primordial nucleus of this germarium develops and then forms an individual plasmic membrane.
(17) The germarium, composed of a germinative zone and a growth zone, is surrounded externally by a layer of accessory cells the function of which is hypothesized in this study.
(18) This nurse cell is formed during differential mitoses in the germarium as one of two prooocytes.
(19) During their migration through the germarium, follicle cells undergo several structural changes and, of these, the most conspicuous one occurs at the level of the nucleolus.
(20) Complete reconstruction of the synaptonemal complex in 12 pachytene (defined here as that stage in which the synaptonemal complex is continuous throughout the bivalents) nuclei from one wild-type germarium has permitted the following observations.
Rotifera
Definition:
(n.) An order of minute worms which usually have one or two groups of vibrating cilia on the head, which, when in motion, often give an appearance of rapidly revolving wheels. The species are very numerous in fresh waters, and are very diversified in form and habits.
Example Sentences:
(1) Recovery of the zooplankton populations in rice fields after biocide use is initially accomplished by Rotifera spp.