Use the following words to answer the quiz questions
amplitude
energy
wavelength
frequency
mechanical
electromagnetic
1. all waves must first start with a source of
to transfer through the universe.
2. these waves must make contact with an object to transfer energy. examples are water
or sound waves.
3. these waves can travel without touchingan object. examples are light and radio waves.
4. this is the measurement of the width of a wave.
5. this is the measurement of the speed of a wave.
6. this is the measurement of the height of a wave.
7. true or false: waves such as light will move at a constant speed unless they are
disturbed by something such as a glass prism.

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

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

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.