Arthropods are small animals with how many legs?
Options:
- (A) 2
- (B) millipede
- (C) Aves
- (D) six
- (E) long
- (F) one hundred
- (G) legs
- (H) two
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Let's think first: Most arthropods are insects. An insect is a small animal with six legs. Most arthropods are small animals with six legs.... So the answer is [(D)]

What continues to grow throughout their lives?
Options:
- (A) Chemical energy
- (B) bacteria
- (C) animals
- (D) Humans
- (E) Orange Trees
- (F) Cats
- (G) an organism's body
- (H) Dogs
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Let's think first: Most plants continue to grow throughout their lives. All orange trees are plants. Orange trees continue to grow throughout their lives.... So the answer is [(E)]

What are the units of basic information on chromosomes?
Options:
- (A) colors
- (B) heriditary
- (C) sensory neurons
- (D) Most plants
- (E) Joules
- (F) pollen
- (G) A Greek letter
- (H) photons
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Let's think first: Genes that are located on the same chromosome are called linked genes. Gene A gene is the basic unit of heriditary information. Chromosomes contain the basic units of heriditary information.... So the answer is [(B)]

What attracts bees to the flower?
Options:
- (A) seeds
- (B) orchids
- (C) other bees
- (D) butterflies
- (E) thorns
- (F) heat
- (G) petals
- (H) pollen
--
Let's think first: Petals attract pollinators to the flower. Bees are effective pollinators. Petals attract bees to the flower.... So the answer is [(G)]

Which type of pollution is most harmful to lungs?
Options:
- (A) Lead
- (B) air
- (C) Cars
- (D) oil
- (E) acid
- (F) CFCs
- (G) SO2
- (H) mold
--
Let's think first: Air pollution harms the respiratory and circulatory systems. Exposure to ozone can diminish lung function and increase susceptibility to respiratory infection. Exposure to air pollution can harm the lungs.... So the answer is [(B)]

What is an arthopod with two wings?
Options:
- (A) rare
- (B) fly
- (C) two
- (D) host
- (E) Aves
- (F) male
- (G) bird
- (H) bats
--
Let's think first: Most arthropods are insects. Flies are insects with two wings. Flies are arthropods with two wings.... So the answer is [(B)]