What leads to evolution?
Options:
- (A) Plants growth
- (B) competition
- (C) Adatation
- (D) our star
- (E) Experimentation
- (F) Stagnation
- (G) environment
- (H) Information
--
Let's think first: Evolution occurs by a process called natural selection. Adaptation is the result of natural selection. Adaptation results in evolution.... So the answer is [(C)]

What is a major food source for humans?
Options:
- (A) poison dart frogs
- (B) honeybees
- (C) barnacles
- (D) intervertebrates
- (E) other humans
- (F) photosynthesis
- (G) the body's largest organ
- (H) Most plants
--
Let's think first: Mollusks are a major food source for other organisms, including humans. Mollusks are invertebrates and are no exception. Intervertebrates are a major food source for other organisms, including humans.... So the answer is [(D)]

Most of the food consumed by people worldwide comes from
Options:
- (A) humans
- (B) trees
- (C) Energy
- (D) animals
- (E) plants
- (F) vitamin C
- (G) honeybees
- (H) Earth
--
Let's think first: Grasses supply most of the food consumed by people worldwide. Grasses are very distinctive plants. Plants supply most of the food consumed by people worldwide.... So the answer is [(E)]

What is generally similar across species?
Options:
- (A) tail fins
- (B) our star
- (C) the eyes
- (D) vision
- (E) mating
- (F) Flowers
- (G) bushes
- (H) alpacas
--
Let's think first: Mating is generally preceded by courtship. Courtship is similar across species. Mating is generally similar across species.... So the answer is [(E)]

What are a major food source to organisms including humans?
Options:
- (A) leeches
- (B) earthworms
- (C) snails
- (D) plants
- (E) tapeworms
- (F) trees
- (G) potatoes
- (H) bushes
--
Let's think first: Mollusks are a major food source for other organisms, including humans. Mollusks in the diorama include snails and clams. Snails are a major food source for other organisms, including humans.... So the answer is [(C)]

What interferes with cooling of the body?
Options:
- (A) low humidity
- (B) snow
- (C) ice
- (D) Sulfur dioxide
- (E) Leptospirosis
- (F) Smoking
- (G) heat or cold
- (H) high humidity
--
Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. High humidity interferes with evaporation of the sweat. High humidity interferes with cooling of the body.... So the answer is [(H)]