What uses sounds, chemicals and visual cues?
Options:
- (A) bees
- (B) seaweed
- (C) running
- (D) monkeys
- (E) humans
- (F) germs
- (G) athletes
- (H) coral
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Let's think first: Animals can communicate with sounds, chemicals, or visual cues. Monkeys are wild animals. Monkeys communicate with sounds, chemicals or visual cues.... So the answer is [(D)]

What is a central nervous system stimulant?
Options:
- (A) saccharose
- (B) barbiturates
- (C) cigarettes
- (D) sweating
- (E) muscle relaxants
- (F) A Greek letter
- (G) Decibels
- (H) valium
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Let's think first: Caffeine is a central nervous system stimulant. Likewise, the caffeine and saccharose stimulate the body's stimulation of serotonin. Saccharose is a central nervous system stimulant.... So the answer is [(A)]

Female gametophytes produce eggs inside what part of flowers?
Options:
- (A) Petal.
- (B) an area swollen with pus
- (C) allow growth
- (D) at or near the margins
- (E) Produce department.
- (F) Chlorophyll
- (G) Chicken.
- (H) Where ovum, are stored
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Let's think first: Female gametophytes produce eggs inside the ovaries of flowers. Ovum, or eggs, are stored in the ovaries. Female gametophytes produce eggs inside where ovum, or eggs, are stored of flowers.... So the answer is [(H)]

What produces both eggs and sperm?
Options:
- (A) Plant reproduction
- (B) sub-units of species
- (C) gastropod shells
- (D) an individual mature sponge
- (E) Microscopic organisms
- (F) members of their own species
- (G) peachleaf willow
- (H) seed dispersal
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Let's think first: Adult sponges produce eggs and sperm. An adult is mature, fully developed. Mature sponges produce eggs and sperm.... So the answer is [(D)]

What lives in water that contains little or no salt?
Options:
- (A) animals
- (B) terrapins
- (C) a fish
- (D) Chlorophyll
- (E) bacteria
- (F) sharks
- (G) sodium
- (H) humans
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Let's think first: Freshwater biomes have water that contains little or no salt. Terrapins are freshwater turtles. Terrapins live in water that contains little or no salt.... So the answer is [(B)]

What are the affects of burning fuel on human health?
Options:
- (A) emissions
- (B) They aid lung health.
- (C) direct damage to the lungs
- (D) They are a hazard.
- (E) The affects are mildly healthy
- (F) The fuel burns clean.
- (G) Greenhouse gases
- (H) Global warming
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Let's think first: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel. Carbon Monoxide Carbon monoxide is a health hazard. Furnaces and other devices that burn fuel are health hazards.... So the answer is [(D)]