BIOL 1020 Lecture 2: Lecture 2

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy Stacey

Document Summary

Multiple choice question: in terms of the hierarchy of life lake manitoba is at the level of ecosystem while a single sturgeon is at the level of organism. (has abiotic and biotic factors and a single sturgeon) Properties of water that support life (on earth) Solution: liquid is a homogenous mixture of substances. Aqueous solution: solutes dissolved in water (the solvent) Each ion of an aqueous solution is surrounded by a hydration shell. (shell of water surrounding an ion in a solution) Ionic and polar regions on the protein"s surface attract water molecules. Hydrophilic substance: has an affinity for water (relatively polar bonds) -hydrophobic substance: does not have an affinity for water (relatively non polar bonds) eg. salad dressing. Sometimes if you mix them you can make a homogenous mixture called a colloid. H-bonding in ice is more ordered than in liquid water. (in liquid water they continue to break and re-form)