Download Homeostasis: The ability or tendency of an organism or cell to

Homeostasis:
The ability or tendency of an organism or cell to maintain internal
equilibrium by adjusting its physiological processes.
The tendency of an organism or cell to regulate its internal conditions, such as the
chemical composition of its body fluids, so as to maintain health and functioning,
regardless of outside conditions. The organism or cell maintains homeostasis by
monitoring its internal conditions and responding appropriately when these
conditions deviate from their optimal state. The maintenance of a steady body
temperature in warm-blooded animals is an example of homeostasis. In human
beings, the homeostatic regulation of body temperature involves such mechanisms
as sweating when the internal temperature becomes excessive and shivering to
produce heat, as well as the generation of heat through metabolic processes when
the internal temperature falls too low.
The Hardy-Weinberg Equation
To estimate the frequency of alleles in a population, we can use the HardyWeinberg equation. According to this equation:
p = the frequency of the dominant allele (represented here by A)
q = the frequency of the recessive allele (represented here by a)
For a population in genetic equilibrium:
p + q = 1.0 (The sum of the frequencies of both alleles is 100%.)
(p + q)2 = 1
so
p2 + 2pq + q2 = 1
The three terms of this binomial expansion indicate the frequencies of the
three genotypes:
p2 = frequency of AA (homozygous dominant)
2pq = frequency of Aa (heterozygous)
q2 = frequency of aa (homozygous recessive)
Ecology Link:
http://www.rpi.edu/dept/chem-eng/Biotech-Environ/ECOLOGY/project.html
Biomes Link
http://www.worldbiomes.com/
http://sustainablescale.org/ConceptualFramework/UnderstandingScale/Meas
uringScale/CarryingCapacity.aspx