_ lack respiratory and excretory systems.
Options:
- (A) graptolites
- (B) insects
- (C) ferns
- (D) barnacles
- (E) fossil fuels
- (F) Allergies
- (G) starfish
- (H) parasites
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Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems.... So the answer is [(G)]
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What has a centralized nervous system with a brain?
Options:
- (A) Man
- (B) Birds
- (C) leeches
- (D) shark
- (E) evergreens
- (F) salmon
- (G) worms
- (H) pan
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Let's think first: Fish have a centralized nervous system with a brain. Sharks are a type of fish. Sharks have a centralized nervous system with a brain.... So the answer is [(D)]
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Most types of what have motility?
Options:
- (A) gastropod shells
- (B) members of their own species
- (C) single-celled organisms
- (D) Something to move
- (E) remains of prehistoric life
- (F) microbial fuel cells
- (G) microorganisms
- (H) share properties
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Let's think first: Most protists have motility. Protists Protists are single-celled organisms. Most single-celled organisms have motility.... So the answer is [(C)]
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What are in the animal kindgom?
Options:
- (A) seeds
- (B) edible
- (C) parasites
- (D) bacteria
- (E) fungi
- (F) humans
- (G) people
- (H) bees
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Let's think first: Animals are a kingdom of multicellular eukaryotes. Humans, of course, are an example of a multicellular eukaryote. Humans are, of course, in the animal kingdom.... So the answer is [(F)]
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