Chapter 7. Adaptations & Patterns of Subsistence. What Is Adaptation?. Adaptation : Any change in the structure or functioning of an organism that makes it better suited to its environment. This process leads to changes in the organisms and impacts their environment.
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Patterns of Subsistence
Bolivians in the highlands use increased hemoglobin production to adapt to the low levels of oxygen at high altitudes, while inhabitants of the Tibetan plateau use increased respiration.
Physical = Structural
Behavioral = Cultural
Coral snake Red milk snake
Bergmann’s Rule: Within a species the body mass increases with latitude and colder climate (i.e., larger sub-species are found at higher altitudes or colder climates.
Allen’s Rule: In warm blooded species, the relative size of the limbs of the body decreases with decreases of mean temperature.
Gloger’s Rule: within a species more heavily pigmented forms tend to be found in more humid environments (e.g., near the equator: most studied in birds). Caveats: Tibetans (high UV radiation); Inuits (diet high in vitamin D).
Terraced rice fields in Bali reflect cultural adaptation to a mountainous tropical environment.
(A) his flint knife (B) his tattoos (C) his grass filled shoes (D) specific plants
(A) True (B) False
(A) Winter (B) Spring (C) Summer (D) Fall