• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Life Science Final Review - Saint Mary Catholic School
Life Science Final Review - Saint Mary Catholic School

... Mendel's First Law of Genetics (Law of Segregation): A gene that can exist in more than 1 form (e.g. a gene for round or w_______________________ peas) is called an a________________________. When gametes are produced (by meiosis) in the parent, allele pairs separate leaving each g_______________ wi ...
Cell Lineage and Fate Map of the Primary
Cell Lineage and Fate Map of the Primary

... embryonic cells can be readily identified among distantly related animals. Spiralian embryos are particularly amenable to studies of fate-mapping, and larval fates of identified cells are conserved among diverse taxa. One cell of particular importance in spiralian development is 2d, or the primary s ...
EUKARYOTE CELL ULTRASTRUCTURE
EUKARYOTE CELL ULTRASTRUCTURE

... Both chloroplasts and mitochondria are double membrane bound They involved in energy reactions They contain extranuclear DNA and characteristic small ribosomes of their own This has led biologists to believe that there may be some similarity in their origins in the cells of eukaryotes. The endosymbi ...
Powerpoint
Powerpoint

... • Stimulation from inputs to dendrites causes the cell membrane to open briefly • Positively charged sodium ions flow in through the cell membrane • If resting potential rises above threshold, an action potential starts to travel from the cell body down the axon ...
Biology Student Text Sample Pages
Biology Student Text Sample Pages

... Viruses in the World If you have ever had a cold or the flu or a childhood illness such as measles or chicken pox, you know that viruses can make you sick. But did you know that viruses can also protect you from diseases and save your life? As a young child, you received vaccinations (vak suh NAY s ...
Length and Amino Acid Composition Complementarity
Length and Amino Acid Composition Complementarity

Full text in pdf format
Full text in pdf format

... (Curculionidae; Insecta), the bacter1.a reproduce within nutrient cells a n d pass into oocytes through the nutrient chord when the nutrient cells begin to secrete nour~shmentinto growing oocytes (Buchner 1965). In the scaphopods Dentalium dentale a n d D. antillarum, bactena, which are present in t ...
Activation of β-Catenin in Dendritic Cells Regulates
Activation of β-Catenin in Dendritic Cells Regulates

... Whether β-catenin signaling in DCs is critical for intestinal homeostasis. We compared the frequencies of Treg cells and TH17/TH1 cells in the intestine of β-catDC−/− and β-catfl/fl mice because intestinal DCs and macrophages play an important role in the induction of these subsets. β-catDC−/− mice ...
Domains of Life Quiz Answer Key
Domains of Life Quiz Answer Key

... 1. True or False: Eukarya is separated from the other domains by the presence of a nucleus in their cells. ...
EMBO REPORT SUPPLEMENTARY SECTION Quantitation of
EMBO REPORT SUPPLEMENTARY SECTION Quantitation of

... 2003) and Figure S2A, B), although expression is much weaker in the posterior neural plate. The effect of Notch signalling on cyclin A2 and cdk2 messages in prospective neural tissue was determined by in situ hybridization at mid-neurula stages. Overexpression of Notch-ICD and XSu(H)-ANK reduces the ...
Comparison of an immortalized human corneal epithelial cell line
Comparison of an immortalized human corneal epithelial cell line

... Susceptibility of HCE to HSV-1 and its suitability for the isolation of HSV-1 The HCE was found to be suceptible to HSV-1 as determined by both the shell vial and tube cultures. Cytopathic effect (CPE) (fig. 2) was seen in the tube cultures at 48 h (>50% of the cells were refractile, showed rounding ...
CD1 Proteins, but No Functional CD1d The Bovine CD1 Family
CD1 Proteins, but No Functional CD1d The Bovine CD1 Family

... Flow cytometric analysis of bovine thymocytes, bovine PBMC, and 293T cells transfected with full-length boCD1B3 and boCD1A transcript was performed with a panel of Abs against human and boCD1 (Fig. 2 and data not shown). The Abs SBU-T6 (17), CC14 (18), CC20 (19, 20), and CC122 (19, 21) are known to ...
Solubilization and Analysis of Mannoprotein Molecules from The
Solubilization and Analysis of Mannoprotein Molecules from The

... Zymolyase is a lytic enzyme complex with activity against yeast walls, which is used for the preparation of protoplasts from whole cells (Kitamura & Yamamoto, 1972). It contains mainly (1,3)-P-glucanase activity. We checked the possibility that digestion of glucan in purified walls by Zymolyase migh ...
Cold Hardiness of Woody Plants
Cold Hardiness of Woody Plants

... not nearly enough to account fully for the hardiness that occur. Other chemical changes are known to occur in the cells associated with cold acclimation, such as changes in quantity and kinds of proteins, but these changes are difficult to translate into specific benefits to the tissues. Cell membra ...
Weber et al_rev Legends of supplementary figures and tables
Weber et al_rev Legends of supplementary figures and tables

Janice Evans
Janice Evans

... – Fertilization / egg activation • exit from metaphase II arrest and progression into the embryonic cell cycle ...
Genome Transplantation in Bacteria
Genome Transplantation in Bacteria

... genome and are free of detectable recipient genomic sequences. These cells that result from genome transplantation are phenotypically identical to the M. mycoides LC donor strain as judged by several criteria. t has been known ever since Oswald Avery’s pioneering experiments with pneumococcal transf ...
Developmentally Controlled Farnesylation
Developmentally Controlled Farnesylation

... as well. Similarly, NAP1 is encoded by small gene families in tobacco and rice (Dong et al., 2003). The two OsNAP1 and three of the NtNAP1 proteins have CaaX boxes that can be prenylated in vitro by Arabidopsis PFT (A. Galichet and W. Gruissem, unpublished data). To substantiate that AtNAP1;1 is a s ...
Mitochondria
Mitochondria

... synthesize new organic compounds from CO2 and H2O. ...
Expression of the RET Receptor Tyrosine Kinase and GDNFR
Expression of the RET Receptor Tyrosine Kinase and GDNFR

... The RET proto-oncogene product is a receptor tyrosine kinase representing the signal-transducing molecule of a multisubunit surface receptor complex for the glial cell linederived neurotrophic factor (GDNF), in which a novel glycosyl-phosphatidylinositol (PI)-linked protein (termed GDNFRa) acts as t ...
The Developmental Capacity of Nuclei taken from Intestinal
The Developmental Capacity of Nuclei taken from Intestinal

... intestine nuclei were found to have been fixed at exactly this time, and in 3 of these the chromosomes were clumped and pycnotic. In some cases the spindle also seemed abnormal. It is clear that these eggs could not have cleaved normally; the chromosomes would probably have broken up into pycnotic l ...
Verrucomicrobia Capturing Single Cell Genomes of Active Polysaccharide
Verrucomicrobia Capturing Single Cell Genomes of Active Polysaccharide

... freshwater sample. There was a clear phylogenetic separation between coastal and freshwater Verrucomicrobia SAGs, with Verrucomicrobiacea dominating the coastal sample and Subdivision 3 dominating the freshwater sample (Figure 3). Verrucomicrobia SAGs grouped into ten marine and five freshwater phyl ...
Studies of vacuolar trafficking pathways regulated by RAB5 and
Studies of vacuolar trafficking pathways regulated by RAB5 and

... three RAB5-related proteins encoded in the A. thaliana genome: ARA7 and RHA1 (also known as RABF2b and RABF2a, respectively), conventional RAB5s, and ARA6 (also known as RABF1), the plant-unique RAB5. Recently, it was demonstrated that ARA6 acts in a different trafficking pathway than conventional ...
Phototropism Reading
Phototropism Reading

... Essential Knowledge 2C2: Organisms respond to changes in their external environment. ...
figure 2 - Open Biology
figure 2 - Open Biology

... requires a systems-level understanding of the signalling networks that respond to external cues and regulate the cytoskeleton. Classical biochemical and genetic approaches have identified thousands of individual components that contribute to cell shape, but it remains difficult to predict how cell s ...
< 1 ... 289 290 291 292 293 294 295 296 297 ... 1231 >

Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report