Invertebrates can be what?
Options:
- (A) people
- (B) scarce resources
- (C) vertebrates
- (D) deposit feeders
- (E) Catch prey
- (F) major threat to health
- (G) more abundant
- (H) planets
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Let's think first: Earthworms are important deposit feeders that help form and enrich soil. Earthworms by Casey Earthworms are invertebrates. Invertebrates can be deposit feeders.... So the answer is [(D)]

Soil can be depleted of a thing that fertilizers can what to soil?
Options:
- (A) grow
- (B) add
- (C) loss
- (D) pH
- (E) harm
- (F) corn
- (G) peat
- (H) kill
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Let's think first: Soil can be depleted of nutrients. Fertilizers add nutrients to the soil. Soil can be depleted of what fertilizers can add to soil.... So the answer is [(B)]

What might have an envelope of proteins and enzymes?
Options:
- (A) fur seals
- (B) some viruses
- (C) Most plants
- (D) a fish
- (E) animal transport
- (F) animals
- (G) chickens
- (H) it needs them
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Let's think first: Some viruses have an envelope of phospholipids and proteins. Phospholipases are the enzymes that degrade phospholipids . Some viruses have an envelope of enzymes and proteins.... So the answer is [(B)]

What are extremely important biomes?
Options:
- (A) important habitats
- (B) urban city
- (C) remains of prehistoric life
- (D) zoos
- (E) water conservation
- (F) Most plants
- (G) manmade aqueducts
- (H) marshes and swamps
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Let's think first: Wetlands are extremely important biomes. Marshes and swamps are wetlands. Marshes and swamps are extremely important biomes.... So the answer is [(H)]

What happens when sperm swim from men's to women's reproductive organs?
Options:
- (A) by indirect light
- (B) matter vibrating
- (C) death
- (D) competition
- (E) fertile crescent
- (F) fertilizer
- (G) permineralization
- (H) fertilization
--
Let's think first: Sperm had to swim from male to female reproductive organs for fertilization. And the word for woman means a female of any age. Sperm have to swim from men to women reproductive organs to be fertilized.... So the answer is [(H)]

What can a certain protein affect in meat?
Options:
- (A) health
- (B) piousness
- (C) stamina
- (D) retina
- (E) toughness
- (F) liveliness
- (G) saltiness
- (H) Energy
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Let's think first: Cartilage is a tough tissue that contains a protein called collagen. Collagen contributes to meat toughness. A protein contributes to meat toughness.... So the answer is [(E)]