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The Malaria Atlas Project aims to map global levels of malaria, providing a way to determine the global spatial limits of the disease and to assess disease burden. [218] [219] This effort led to the publication of a map of P. falciparum endemicity in 2010 and an update in 2019. [220] [221] [222] As of 2021, 84 countries have endemic malaria. [17]
Genetics is the study of genes, genetic variation, and heredity in organisms. [1][2][3] It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically.
Stroke (also known as a cerebrovascular accident (CVA) or brain attack) is a medical condition in which poor blood flow to the brain causes cell death. [5] There are two main types of stroke: ischemic, due to lack of blood flow, and. hemorrhagic, due to bleeding.
By way of analogy, the allele (a particular version of a gene) which causes sickle cell disease when two copies are present, also confers an adaptive advantage when one copy is present by providing resistance to malaria with non-symptomatic sickle cell trait—which is known as "heterozygote advantage".
The cell wall also prevents over-expansion when water enters the cell. [45] The major polysaccharides making up the primary cell wall of land plants are cellulose, hemicellulose, and pectin. The cellulose microfibrils are linked together with hemicellulose, embedded in a pectin matrix. The most common hemicellulose in the primary cell wall is ...
Christina Hall/Instagram. Christina Hall and her daughter Taylor at a dinner for Taylor's 14th birthday on Sept. 20. The HGTV star shares Taylor and son Brayden James, 9, with ex-husband Tarek El ...
24-cell. In four-dimensional geometry, the 24-cell is the convex regular 4-polytope [1] (four-dimensional analogue of a Platonic solid) with Schläfli symbol {3,4,3}. It is also called C24, or the icositetrachoron, [2] octaplex (short for "octahedral complex"), icosatetrahedroid, [3] octacube, hyper-diamond or polyoctahedron, being constructed ...
The Lower Rio Grande Valley (Spanish: Valle del Río Grande), commonly known as the Rio Grande Valley or locally as the Valley or RGV, is a region spanning the border of Texas and Mexico located in a floodplain of the Rio Grande near its mouth. [1] The region includes the southernmost tip of South Texas and a portion of northern Tamaulipas, Mexico.