Q: What do most molds get their organic compounds from?
Options:
- (A) dead organisms
- (B) particles in the air
- (C) fossil fuels
- (D) aqueous solution
- (E) burning coal
- (F) living organisms
- (G) swamp vegetation
- (H) sunlight
A: So, my chain of thought: Most fungi get organic compounds from dead organisms. Fungi include yeasts, molds, and fleshy fungi. Molds get organic compound from dead organisms. The answer is (A).

Q: What enables natural selection to occur?
Options:
- (A) environment
- (B) mutations
- (C) competition
- (D) relocation
- (E) Darwin
- (F) evolutionary development
- (G) root growth
- (H) research
A: So, my chain of thought: Mutations are essential for evolution to occur. Natural selection is the mechanism of evolution. Mutations allow for natural selection to occur. The answer is (B).

Q: 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
A:
So, my chain of thought: 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. The answer is (F).