Biology 3602A/B Lecture Notes - Lecture 3: Homeostasis, Carboniferous, Osmotic Concentration
5 Aug 2016
School
Department
Course
Professor
Document Summary
Cannot change chemistry and physics especially the laws of thermodynamics. Evolutionary history: an animal can only do with what it"s got. When we look at the life of an animal, animals do not obey the 2nd law; they become more ordered and more complex as they grow to a certain point. How? transforming energy in order to fight the 2nd law. Temp of water is about 19oc, and core of the fish is 31oc with internal 300 mosm (thus hypoosmotic: lower solute conc than outside) while sea water is 1050 mosm. Descent implies that there is heritable genetic material, which gives you traits and interacts with the environment to produce a phenotype. Modification: animals that aren"t good enough are selected out. The best data we have is that all life originated from one single common ancestor (this means this is monophyletic) Where we see animals branch off from other kingdoms, there is one common ancestor.
