Endocrine hormones travel through the what in something that runs like water?
Options:
- (A) body
- (B) muscle
- (C) state
- (D) a path
- (E) ligt
- (F) a fish
- (G) liquid
- (H) CO 2
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Let's think first: Endocrine hormones travel throughout the body in the blood. And blood, blood runs like water. Endocrine hormones travel through the body in something that runs like water.... So the answer is [(A)]

Arthropods with what may live in large colonies and have complex social behaviors.
Options:
- (A) fur
- (B) gills
- (C) animals
- (D) complex
- (E) Wasps
- (F) vertebrae
- (G) Flowers
- (H) wings
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Let's think first: Insects may live in large colonies and have complex social behaviors. Insects are the only arthropod to have wings. Arthropods with wings may live in large colonies and have complex social behaviors.... So the answer is [(H)]

What kind of animals conserve energy with their hair or fur?
Options:
- (A) fur
- (B) bears
- (C) mammals
- (D) sweating
- (E) frogs
- (F) cactus
- (G) goats
- (H) humans
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Let's think first: Mammals conserve body heat with their hair or fur. Basically, heat is energy. Mammals conserve energy with their hair or fur.... So the answer is [(C)]

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
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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)]

Herbivores eat producers or other what?
Options:
- (A) roadkill
- (B) Most plants
- (C) living things
- (D) scarce resources
- (E) carcasses
- (F) dead things
- (G) Chemical energy
- (H) Organic compounds
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Let's think first: Consumers take in food by eating producers or other living things. Herbivores eat producers and are called first order consumers. Herbivores eat producers or other living things.... So the answer is [(C)]

Bacteria causes what to be harmed?
Options:
- (A) plants
- (B) electronics
- (C) fossils
- (D) humans
- (E) animals
- (F) viruses
- (G) food
- (H) the skin
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Let's think first: Plants respond to daily and seasonal cycles and to disease. Plant diseases cause by bacteria. Plants respond to seasonal and daily cycles and to bacteria.... So the answer is [(A)]