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The primary manifestations are thrombocytopenia and megakaryocytopenia, i.e. low numbers of platelets and megakaryocytes. There is an absence of megakaryocytes in the bone marrow with no associated physical abnormalities. [14] The cause for this disorder appears to be a mutation in the gene for the TPO receptor, c-mpl, despite high levels of ...
It is ideally spatially unstructured and temporally unstructured, in a steady state defined by the rates of nutrient supply and bacterial growth. In comparison to batch culture, bacteria are maintained in exponential growth phase, and the growth rate of the bacteria is known. Related devices include turbidostats and auxostats.
Genome size ranges (in base pairs) of various life forms. Genome size is the total amount of DNA contained within one copy of a single complete genome.It is typically measured in terms of mass in picograms (trillionths or 10 −12 of a gram, abbreviated pg) or less frequently in daltons, or as the total number of nucleotide base pairs, usually in megabases (millions of base pairs, abbreviated ...
Obligate bacterial symbionts or pathogens have the smallest genomes and the fewest pseudogenes of the three groups. [12] The relationship between life-styles of bacteria and genome size raises questions as to the mechanisms of bacterial genome evolution. Researchers have developed several theories to explain the patterns of genome size ...
The central and rightmost cell are in interphase, so their DNA is diffuse and the entire nuclei are labelled. The cell on the left is going through mitosis and its chromosomes have condensed. Cell nucleus : A cell's information center, the cell nucleus is the most conspicuous organelle found in a eukaryotic cell.
Scientists have discovered a bacterium that's about 5,000 times larger than any other giant bacteria -- large enough to see without a microscope.
In comparison to eukaryotes, the intracellular features of the bacterial cell are extremely simple. Bacteria do not contain organelles in the same sense as eukaryotes. Instead, the chromosome and perhaps ribosomes are the only easily observable intracellular structures found in all bacteria. There do exist, however, specialized groups of ...
The coral shelters a host of marine life including fish, crabs and shrimp. It’s also like a living encyclopedia, said San Féliz, containing information about ocean conditions going back ...