[Q] What is a basis for natural selection?
Options:
- (A) fur and fat
- (B) competition
- (C) mutation
- (D) root growth
- (E) insects
- (F) animals
- (G) trees
- (H) cows
[A] Here's my solution: Mutation creates new genetic variation in a gene pool. Genetic variation is the basis for natural selection. Mutation is a basis for natural selection. The answer is (C).

[Q] _ have the amazing capacity to regrow segments.
Options:
- (A) ferns
- (B) arachnids
- (C) roots
- (D) earthworms
- (E) anthropods
- (F) crustacean
- (G) loose soil
- (H) root growth
[A] Here's my solution: Annelids have the amazing capacity to regrow segments that break off. Earthworms Earthworms are in the phylum Annelids. Earthworms have the amazing capacity to regrow segments that break off. The answer is (D).

[Q] When it rains in the mountains where would the rain fall?
Options:
- (A) looseness of dirt or compost
- (B) Plant growth is reduced
- (C) It used to be covered by water
- (D) Inches or fractions of inches.
- (E) air mass over Earth's surface
- (F) on the windward side
- (G) In the winter
- (H) colder and wetter
[A] Here's my solution: Precipitation falls on the windward side of the mountain range. Rain is also known as precipitation. Rain would fall on the windward side of the mountain range. The answer is (F).

[Q] What has a characteristic life cycle that includes alternation of generations?
Options:
- (A) humans
- (B) leaves
- (C) Oak
- (D) dogs
- (E) Trees
- (F) cacti
- (G) amoeba
- (H) ferns
[A]
Here's my solution: All plants have a characteristic life cycle that includes alternation of generations. All ferns are shade plants. Ferns have a characteristic life cycle that includes alternation of generations. The answer is (H).