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)]
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The protective covering on mammals, that helps them conserve body heat, is usually:
Options:
- (A) spiny
- (B) scaley
- (C) elastic
- (D) dense
- (E) fuzzy
- (F) skin
- (G) spiky
- (H) fat
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Let's think first: Mammals conserve body heat with their hair or fur. Mammals Hair or fur covers the bodies of most mammals. Mammals conserve body heat with their fuzzy, protective covering.... So the answer is [(E)]
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What comes from eggs?
Options:
- (A) pancakes
- (B) dogs
- (C) seeds
- (D) Allergies
- (E) snails
- (F) cats
- (G) pollen
- (H) sound
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Let's think first: Mollusks are invertebrates such as the common snail. All mollusks come from eggs. The common snail comes from eggs.... So the answer is [(E)]
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What causes human disease?
Options:
- (A) HPV
- (B) UV
- (C) minerals
- (D) Tamiflu
- (E) mold
- (F) HIV
- (G) human growth
- (H) CFCs
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Let's think first: Viruses cause many human diseases. Examples include influenza, rabies, HIV, and Herpes viruses. Influenza causes human disease.... So the answer is [(F)]
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