Which of these statements about light microscopes and electron microscopes is not true? you can use light microscopes to observe both living and nonliving cells; you can use electron microscopes to observe only nonliving cells. light microscopes use visible light rays; electron microscopes use beams of electrons. preserving and staining samples for use with light microscopes is necessary; preserving and staining samples for use with electron microscopes is optional.

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

How does natural selection change thephenotypes within a population over time?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?