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In chapter 13 (which highlights the emotional states of self-attention, shame, shyness, modesty, and blushing), Darwin describes blushing as "the most peculiar and the most human of all expressions". Darwin closes the book with chapter 14, where he summarises his central argument, demonstrating how human emotions link mental states with bodily ...
An algebraic equation is an equation involving polynomials, for which algebraic expressions may be solutions. If you restrict your set of constants to be numbers, any algebraic expression can be called an arithmetic expression. However, algebraic expressions can be used on more abstract objects such as in Abstract algebra.
Neil Allison Campbell (April 17, 1946 – October 21, 2004) was an American scientist known best for his textbook, Biology, first published in 1987 and repeatedly through many subsequent editions. The title is popular worldwide and has been used by over 700,000 students in both high school and college -level classes.
If the rational root test finds no rational solutions, then the only way to express the solutions algebraically uses cube roots. But if the test finds a rational solution r, then factoring out (x – r) leaves a quadratic polynomial whose two roots, found with the quadratic formula, are the remaining two roots of the cubic, avoiding cube roots.
Rational design of a protein relies on an in-depth knowledge of the protein structure, as well as its catalytic mechanism. [28] [29] Specific changes are then made by site-directed mutagenesis in an attempt to change the function of the protein. A drawback of this is that even when the structure and mechanism of action of the protein are well ...
Campbell's law is an adage developed by Donald T. Campbell, a psychologist and social scientist who often wrote about research methodology, which states: . The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor.
Regulation of gene expression, or gene regulation, [1] includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA). Sophisticated programs of gene expression are widely observed in biology, for example to trigger developmental pathways, respond to environmental ...
This allows a test of the genetic overlap between different phenotypes: for instance hair color and eye color. Environment and genetics may also interact, and heritability analyses can test for and examine these interactions (GxE models). A prerequisite for heritability analyses is that there is some population variation to account for.