Ch. 1, 24, 25, & 26

Ch. 1, 24, 25, & 26 - Biology 120 Chapter 1...

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Biology 120 Chapter 1 – Introduction – Scientific Method Hierarchy: Atomic molecular cells tissues organic organisms populations community biome biosphere Ecosystems: producers (chlorophyll, producing energy) Consumers (feeding off of producers) Humans: 20,000 genes X chromosome: 1000 Y: 78 Emergent properties – sum of parts account for something greater function wise (tissue organs) Reductionism – looking at something in great detail Wholistic approach – considering something’s function on larger scale *Feedbacks: Enzyme system (W X Y Z) Z then has positive feedback so X Y faster; (most rxns are negative ; A B C D, D then inhibits A) Domains - kingdom phylum class order family Genus Species Prokaryotes: Bacteria; Archae (common in green environment) Eukaryotes: Protists, Plantae, Fungi, Animalia *Evolution – physical, chemical changes; biological; cultural Change in gene frequency (enough changes/ genetic isolation speciation ) Darwin 1859 w/ origin of species Mendell’s pea experiments Galapagos finches: different adaptations, adaptive radiation – one to many Scientific method – hypothesis [exposed fouling panel (control), caged fouling period (experimental), cage control] does chemical prevent fouling organisms? hypothesis experiment conclusion has to be testable, falsifiable, and repeatable Theory – Atomic, Evolutionary (higher scale); fastest rate – 3000 yrs for fish; mammals – 1 million years Ring species – evidence of speciation, birds coming from common species eventually become much different Morphological species , biologic species
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Ch. 1, 24, 25, & 26 - Biology 120 Chapter 1...

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