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Bergmann's rule is an ecogeographical rule that states that, within a broadly distributed taxonomic clade, populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions. The rule derives from the relationship between size in linear dimensions meaning that both ...
In 1847, Carl Bergmann published his observations that endothermic body size (i.e. mammals) increased with increasing latitude, commonly known as Bergmann's rule. [9] His rule postulated that selection favored within species individuals with larger body sizes in cooler temperatures because the total heat loss would be diminished through lower surface area to volume ratios. [8]
Ecogeographic rules describe similar patterns of variation within and across species and their correlation to biogeography, particularly latitude. While they are described as rules there are often many exceptions to them.
Biological rules and laws are often developed as succinct, broadly applicable ways to explain complex phenomena or salient observations about the ecology and biogeographical distributions of plant and animal species around the world, though they have been proposed for or extended to all types of organisms. Many of these regularities of ecology ...
Remember: the hypothalamus is the part of the brain that signals the testicles to make testosterone. It also regulates body temperature.
Hannon Hachett, 10, and Finlay McCurdy-Van Alstine, 11, are the dancers sharing the beloved part this year. The two are living their dream — and having plenty of fun while doing so. Both began ...
But, Bergmann's Rule is one of those "all other things being equal" rules. There are too many other differences between human populations this rule to be easily applied. One would expect that if people all had the same general physical proportions, the same diet, the same lifestyle, and all wore the same clothes regardless of latitude, you ...
During the episode, Kayce Dutton (Luke Grimes) sold the ranch to Thomas Rainwater (Gil Birminghan), while Beth Dutton (Kelly Reilly) killed her brother Jamie (Wes Bentley) as revenge for their dad ...