What is just one of many ways that pugs learn how to behave.
Options:
- (A) humans
- (B) playing
- (C) sleeping
- (D) growing
- (E) Movement
- (F) sound
- (G) genetics
- (H) exercise
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Let's think first: Playing is just one of many ways that mammals and other animals learn how to behave. Pugs are mammals and mammals shed. Playing is just one of many ways that pugs learn how to behave.... So the answer is [(B)]
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Rivers easily dissolve nutrients and:
Options:
- (A) bacteria
- (B) chemicals
- (C) oxygen
- (D) sodium
- (E) vitamin C
- (F) glucose
- (G) a solute
- (H) a hazard
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Let's think first: Running water is better able to dissolve oxygen and nutrients than standing water. Large, warm rivers hold populations but few occur in cold running water. Oxygen and nutrients dissolve easily in rivers.... So the answer is [(C)]
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What kind of animal doesn't have a respiratory or excretory system?
Options:
- (A) a fish
- (B) bears
- (C) ant
- (D) whale
- (E) humans
- (F) starfish
- (G) mammals
- (H) llama
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Let's think first: Echinoderms lack respiratory and excretory systems. Starfish and sea urchins are also echinoderms. Starfish lack respiratory and excretory systems.... So the answer is [(F)]
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What do arteries carry in the body?
Options:
- (A) solids
- (B) antimatter
- (C) glucose
- (D) gases
- (E) Air
- (F) expelled
- (G) liquid
- (H) oxygen
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Let's think first: Arteries generally carry oxygen-rich blood. Blood is a liquid organ. Arteries carry oxygen rich liquid.... So the answer is [(G)]
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