BSCI 1511 Lecture Notes - Lecture 1: Acrosome Reaction, Mutation, Prophase
Document Summary
Traits that improve reproduction probability will be passed down. Fossil record: supported by fossil record, artificial selection, phylogenetic similarities, progression of forms oldest sediments have simpler forms, darwin proposed gradualism relatively constant, linear rate of evolution, punctuated equilibrium = (cid:498)gaps in the fossil record(cid:499, e. g. Phylogenetic similarities: morphology/anatomy, e. g. homologous limbs forelimbs of horse, human, cat, etc. Indirect signaling: autocrine: sending and receiving cells are the same, e. g. feedback, responds to own signal so it can stop future signaling, paracrine: receiving cell is near the sender (local, e. g. Pm: g proteins made of 3 subunits (cid:523)(cid:573), (cid:574), y(cid:524) Phosphorylase) in supernatant camp degraded by pde or activated by protein kinase a: protein kinase a heterotetramer of 2 reg. and 2 catalytic subunits. camp dissociates the inactive parts, makes it active, active pka simultaneously phosph. And activates mek (map kinase: mek can phosph.