Reich's plan is to find ancient DNA from every culture known to archaeology in the world. Ultimately, he hopes to build a genetic atlas of humanity over the past 50…
Caves that have water sources inside them, known as active caves, make it difficult to determine what life was like in the past. Floods and changes in the water's course spread detritus like bones, stone fragments and tools throughout the cave, often hundreds of meters from where they were...
Bumps called quill barbs on the bones mean the dinosaur had feathers. Some Velociraptor specimens have these barbs. Technology plays a part, too. Computer simulations help determine how fast a dinosaur could move and how it used its limbs. Researchers can also use computer models to reconstruct ...
Scientists use reference panels — genetic data from people with known ancestry, collected by the testing company or available in a public database — to determine regions of the world where different genetic variants are more or less common. Fragments of DNA from the test bind to the sites ...
Serial measurement of the acute phase protein SAA (or C-reactive protein as a surrogate) is required to determine the degree of ongoing inflammation and is used to monitor response to anti-inflammatory treatment. Outcome in AA is directly related to SAA concentration with sustained suppression of ...
Determine whether each of the traits listed below are homologous or analogous traits. a). Limb bones of humans and cats b). Wings of birds and insects c). Streamlined body shape in What is typically used to organize homologous traits into groups that evolved from a single a...
Determine the pressure differential of the valve by subtracting the downstream pressure from the upstream pressure. Step 2 Take the square root of the pressure differential. Step 3 Multiply the square root of the pressure differential by the valve coefficient to calculate the flow in gallons per mi...
Determine which taxon, class, or species contains the greatest diversity of organisms. Fill in the blank: In the mind of evolutionary theorists, separate clades (large groups) are derived from a single common at the point where clade lineages ...
Echinoderm Hox clusters are very different from those of other deuterostomes, adding considerably to the diversity of an already heterogeneous landscape of Hox configurations (Figure2). The echinoid (sea urchin) cluster is by far the most thoroughly investigated in terms of both genetics and within...
In 2011, X-chromosome exon capture and sequencing was used to determine the genetic basis of a previously undescribed and idiopathic disorder, later named Ogden syndrome, which was shown to result from a defect in the amino-terminal acetylation of proteins [26]. Since that time, many other ...