Q: Fertilization of what would produce a diploid zygote?
Options:
- (A) ovulation cell
- (B) ova
- (C) p53
- (D) eggs
- (E) diploid tissue
- (F) fertilization cell
- (G) corn
- (H) ovum
A: So, my chain of thought: Fertilization of gametes produces a diploid zygote. Examples of gametes are ova and spermatozoa. Fertilization of ova produces a diploid zygote. The answer is (B).

Q: What kind of cancer does exposure to cigarettes and cigars often cause?
Options:
- (A) lung
- (B) UV
- (C) foot
- (D) damage
- (E) skin
- (F) death
- (G) breast
- (H) harm
A: So, my chain of thought: Lung cancer is most often caused by exposure to tobacco smoke. Tobacco includes cigarettes, cigars, chewing tobacco, and more. Lung cancer is often caused by exposure to cigarettes and cigars. The answer is (A).

Q: Flowing water from a mountain can dissolve carbon in what kind of rock?
Options:
- (A) magma
- (B) loose soil
- (C) loose dirt
- (D) precipitation
- (E) pumice
- (F) limestone
- (G) wind and rain
- (H) andesite
A:
So, my chain of thought: Flowing water can slowly dissolve carbon in sedimentary rock. Limestone is a type of sedimentary rock. Flowing water can slowly dissolve carbon in limestone. The answer is (F).