Natural resources are classified as renewable and nonrenewable. what is the difference between the two? whether or not the resource exists in nature whether or not the resource can be replaced whether or not the resource dwindles in supply whether or not the resource is useful to humans

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth