Pollen consists of tiny grains that are the _ of plants.
Options:
- (A) Mitosis
- (B) made
- (C) small
- (D) sperm
- (E) seeds
- (F) honey
- (G) flowers
- (H) edible
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Let's think first: Pollen consists of tiny grains that are the male gametes of plants. Male gametes are called sperm. Pollen consists of tiny grains that are the sperm. of plants.... So the answer is [(D)]

Members of the apoda order can be found in _.
Options:
- (A) rivers in tundra regions.
- (B) They have webbed feet
- (C) female sex cells
- (D) epidermis and dermis
- (E) rivers in arid regions.
- (F) streams in arid regions.
- (G) microorganisms
- (H) streams in tropical regions
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Let's think first: Caecilians can be found in moist soil near rivers and streams in tropical regions. Caecilians belong to the order Apoda or Gymnophiona. Members of the Apoda order can be found in streams in tropical regions.... So the answer is [(H)]

What has a water vascular system with tube feet?
Options:
- (A) humans
- (B) blastoids
- (C) bushes
- (D) orchids
- (E) Most plants
- (F) ferns
- (G) bacteria
- (H) the Sun
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Let's think first: Echinoderms have a unique water vascular system with tube feet. Echinoderms in the diorama include the crinoids and blastoids. Blastoids have a unique water vascular system with tube feet.... So the answer is [(B)]

What has a life cycle that includes alterations of generations?
Options:
- (A) apple
- (B) trees
- (C) salmon
- (D) Spruce
- (E) insects
- (F) animals
- (G) Cane.
- (H) bees
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Let's think first: All plants have a characteristic life cycle that includes alternation of generations. Many of the plants are fruit trees. All trees have a characteristic life cycle that includes alternation of generations.... So the answer is [(B)]

What are mollusks used for?
Options:
- (A) a herbivore diet
- (B) survival
- (C) a vegetarian diet
- (D) Converting waste.
- (E) Catch prey
- (F) an omnivore diet
- (G) an egg diet
- (H) animal transport
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Let's think first: Mollusks are a major food source for other organisms, including humans. Many organisms are omnivores with variable diets. Humans have variable diets and some consume mollusks as a major food source.... So the answer is [(F)]

What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) Heat energy
- (B) salt and water
- (C) acetic acid
- (D) urine
- (E) ice
- (F) Chlorophyll
- (G) white vinegar
- (H) blood
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Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. Sweat is made of salt and water. Water and salt wets the skin, and when it evaporates, it cools the body.... So the answer is [(B)]