Ques:[What can mutations cause?
Options:
- (A) death and devastation
- (B) blood
- (C) massive damage
- (D) Leptospirosis
- (E) biological diversity
- (F) horses
- (G) ice
- (H) out of control growth]
Ans:[Cancer cells divide more often than normal cells, and grow out of control. Cancer is an example of a mutation in cells. Mutation can cause growth out of control.
(H)]

Ques:[What infects and destroys helper t cells?
Options:
- (A) swea
- (B) Wasps
- (C) AIDS
- (D) CO 2
- (E) PDAs
- (F) humans
- (G) heat
- (H) anemia]
Ans:[HIV infects and destroys helper T cells. Scientists agree that HIV causes Aids. AIDS infects and destroys helper T cells.
(C)]

Ques:[What sea creature can sometimes be microscopic?
Options:
- (A) squids
- (B) a fish
- (C) fungi
- (D) tortoises
- (E) fossils
- (F) barnacles
- (G) bacteria
- (H) alpacas]
Ans:[Some mollusks are nearly microscopic. Interestingly, a squid is also a mollusk. Some squids are nearly microscopic.
(A)]

Ques:[What kicks in after a certain number of divisions?
Options:
- (A) Energy.
- (B) antibiotics
- (C) Energy
- (D) separation
- (E) nerves
- (F) apoptosis
- (G) soccer leagues
- (H) Plants growth]
Ans:
[Cells are programmed to divide only a set number of times. Apoptosis is programed cell death. Division can only happen a certain number of times before apoptosis kicks in.
(F)]