1. any molecule that contains carbon to hydrogen bonding is known as a a) water b) inorganic molecule c) organic molecule 2. how many valance electrons are generally needed to fill the outer shell of most atoms? a) 4 b) 6 c) 8 3. the macromolecules in biochemistry are proteins, carbohydrates, lipids and nucleic acids. what main elements do all of them have in common? a) carbon and sulfur b) carbon and hydrogen c) oxygen and nitrogen d) oxygen and phosphorus

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra