q: Hydrogen bonds cause what to expand when it freezes?
Options:
- (A) salt
- (B) mercury
- (C) NaCl
- (D) lake
- (E) H20
- (F) rain
- (G) h2o
- (H) oxygen
a: (E)... Explanation: Hydrogen bonds cause water to expand when it freezes. Water is everywhere H20. Hydrogen bonds cause H20 to expand when it freezes. That's why the answer is (E).

q: Cancer genes are an example of the type of thing that can be passed on through:
Options:
- (A) people
- (B) blood exposure
- (C) massive damage
- (D) viruses
- (E) Plant reproduction
- (F) contagious
- (G) reproduction
- (H) humans
a: (G)... Explanation: Cancer genes can be inherited. Inherited characteristics are passed on by our genes. Cancer genes can be passed on through reproduction. That's why the answer is (G).

q: Sperm had to swim from what to what reproductive organs for zygotes to occur.
Options:
- (A) barnacles
- (B) male to female
- (C) animals
- (D) ocean water
- (E) male to male
- (F) mouth of rivers
- (G) female to male
- (H) female to female
a: (B)... Explanation: Sperm had to swim from male to female reproductive organs for fertilization. If fertilization occurs, the fertilized eggs are now described as pre-embryos or zygotes. Sperm had to swim from male to female reproductive organs for zygotes to occur. That's why the answer is (B).

q: The bonds of that which when heavy is deuterium cause what to expand when it freezes?
Options:
- (A) matter
- (B) rings
- (C) CO 2
- (D) liquids
- (E) gas
- (F) solutes
- (G) cations
- (H) water
a:
(H)... Explanation: Hydrogen bonds cause water to expand when it freezes. Deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added. The bonds of that which when heavy is Deuterium cause water to expand when it freezes. That's why the answer is (H).