What is necessary for a growing child?
Options:
- (A) four limbs
- (B) stamina
- (C) hydration
- (D) food
- (E) pets
- (F) minerals
- (G) plastics
- (H) a measuring stick
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Let's think first: Minerals are chemical elements that are essential for body processes. Children's bodies are in a developing process. Minerals are necessary for children's growths.... So the answer is [(F)]

What is one of the facets of an organism's evolution?
Options:
- (A) resistance
- (B) fitness
- (C) properties
- (D) thirst
- (E) movement
- (F) swimming
- (G) offspring
- (H) recycling
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Let's think first: Behaviors that improve fitness increase through natural selection. Many organism behaviors have evolved through natural selection. An organism's fitness is a result of evolution.... So the answer is [(B)]

What do plants respond to?
Options:
- (A) Energy.
- (B) heat produced
- (C) Chemical energy
- (D) sun's heat
- (E) the environment
- (F) heat energy
- (G) Sulfur dioxide
- (H) temperature
--
Let's think first: Plants respond to daily and seasonal cycles and to disease. Temperature follows a seasonal cycle. Plants respond to temperature.... So the answer is [(H)]

Some crustaceans feed on
Options:
- (A) phytoplankton
- (B) fungi
- (C) refraction of light
- (D) heat energy
- (E) an organism's body
- (F) carbon
- (G) algae
- (H) salt and water.
--
Let's think first: Zooplankton are tiny animals that feed on phytoplankton. Many zooplankton are crustaceans. Some crustaceans feed on phytoplankton.... So the answer is [(A)]

What can a producer grow down into the soil in order to absorb minerals and water?
Options:
- (A) Trees
- (B) stems
- (C) roots
- (D) Oak
- (E) seeds
- (F) burrs
- (G) grass
- (H) water absorbing petals
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Let's think first: Most plants grow roots down into the soil to absorb water and minerals. If the plant is green, it is a producer. Most producers grow roots down into the soil to absorb water and minerals.... So the answer is [(C)]

What attracts pollinators to the flower?
Options:
- (A) something great for potpourri
- (B) Something with a head, thorax, and abdomen
- (C) peachleaf willow
- (D) By wind and rain
- (E) photosynthesis.
- (F) Something made from fermented ricce
- (G) Earth revolving around the sun
- (H) at or near the margins
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Let's think first: Petals attract pollinators to the flower. Petals are great for potpourri or for making rose petal jelly. Something great for potpourri attracts pollinators to the flower.... So the answer is [(A)]