q: Mutation leads to _.
Options:
- (A) Devolution
- (B) Plants growth
- (C) rapid expansion
- (D) Evolution.
- (E) Degeneration
- (F) Extinction
- (G) massive damage
- (H) anemia
a: (D)... Explanation: Mutation creates new genetic variation in a gene pool. Genetic variation is the raw material for evolution. Mutation leads to evolution. That's why the answer is (D).

q: What is one thing fish cannot make?
Options:
- (A) babies
- (B) nests
- (C) matter
- (D) fat
- (E) edible
- (F) Energy
- (G) bubbles
- (H) food
a: (H)... Explanation: Heterotrophs are living things that cannot make their own food. All fish are heterotrophic. Fish cannot make their own food. That's why the answer is (H).

q: What produces spores that develop into gametophytes?
Options:
- (A) fungi
- (B) cacti
- (C) plants
- (D) ferns
- (E) Orchids
- (F) PDAs
- (G) barnacles
- (H) bushes
a: (E)... Explanation: Flowers produce spores that develop into gametophytes. Another interesting flower is the Orchid flower. Orchids produce spores that develop into gametophytes. That's why the answer is (E).

q: What forms when molecules react with one another?
Options:
- (A) Chemical energy
- (B) substrates
- (C) chemical bonds
- (D) living things
- (E) Organic compounds
- (F) Energy.
- (G) new elements
- (H) flow of electrons
a:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
(C)... Explanation: Chemical bonds form when substances react with one another. All substances are composed of molecules. Chemical bonds form when molecules react with one another. That's why the answer is (C).