BIOL 118 Study Guide - Midterm Guide: Molecular Clock, Falsifiability, Antigen

• School: University of San Diego
• Department: Biology Courses
• Course: BIOL 118
• Professor: Terry Bird

Document Summary

Molecular clock : compare dna sequence (count differences) btwn 2 species estimate when they diverged. Evolution : natural selection; change in species overtime. Natural selection : survival & reproduction of the fittest within a species/population (not individual) over time. Antigen : any molecule that stimulates the immune system. Hypothesis : an educated guess for an explanation based on some evidence but not enough to support. Experiments are meant to test the hypothesis"(explanation) predictions (expected)* Only takes 1 evidence to disprove hypothesis. Correlations not strong evidence to support hypothesis. Correlation btwn econ class & immune system strength. Clumping rbc"s & hiding behind healthy rbc"s. According to molecular clock virulence indicates its more recent. Should"ve attenuate but its evidence that falciparum emerged when we are humans. 2 hypothesis (w/ evidence to support both) Helps plasmodium invade rbc (binding & sticking to rbc or wall) Plasmodium has to adapt to 2 different hosts (ability constrained)