BIOL 1201 : BIOL 1201 Test 1 Review
Document Summary
Cell and body temperatures can range from -2*c-130*c and pressure ranges from 1atm-1100atm. The average depth of the ocean is 2*-4*c body temperatures and approximately -380atm with no sunlight @ Organisms confront a variety of problems due to their environment: antarctic fishes live at -2*c and are ectotherms meaning their body temperature is determined by their environments temperature. Fish accumulate antifreeze molecule (proteins to prevent freezing to death: penguins keep warm at cold temperatures. Thermophiles- bacteria exist at temperatures up to 132* and grow up till 122*: sharks- live with molar used in their tissues to match the osmotic strength of the sea water. Neutrons (neutral charge) and protons (+1 charge) make up the nucleus. Electron has a-1 charge and essentially no mass. There are 92 naturally occurring elements and 118 total. Elements- pure substances which cannot be broken down to simpler substances. Atom- the smallest unit an element can be divided into and retain its identity.
