Migration increases what?
Options:
- (A) root growth
- (B) speed
- (C) distance
- (D) voltage
- (E) energy usage
- (F) Plants growth
- (G) gene flow
- (H) layers of fat
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Let's think first: Gene flow occurs when individuals move into or out of a population. Internal migration describes moves within a country. Gene flow occurs when individuals migrate.... So the answer is [(G)]

Streams may start with runoff seeping out of water containing what?
Options:
- (A) chemicals
- (B) Nutrients
- (C) Nitrous oxide
- (D) Helium
- (E) Lithium
- (F) Sulfur
- (G) soil
- (H) Sediment
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Let's think first: Streams may start with runoff or water seeping out of a spring. Sulfur occurs native in the vicinity of volcanoes and hot springs. Streams may start with runoff or water seeping out of a body of water where sulfur occurs.... So the answer is [(F)]

Some producers use what physical feature to use energy and inorganic molecules?
Options:
- (A) leaves
- (B) sunlight
- (C) solar energy
- (D) sun
- (E) resevoir
- (F) chemicals
- (G) mitosis
- (H) trees
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Let's think first: Producers use energy and inorganic molecules to make food. Leaves make food for the plant. Some producers have leaves to help use energy and inorganic molecules.... So the answer is [(A)]

Which needs fungi need to survive?
Options:
- (A) Energy
- (B) food
- (C) alveoli
- (D) oxygen
- (E) peat
- (F) bushes
- (G) bacteria
- (H) trees
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Let's think first: Oxygen is essential for cellular respiration for all aerobic organisms. Fungi are aerobic organisms. Oxygen is essential for fungi cellular respiration.... So the answer is [(D)]

Most organisms live mainly in
Options:
- (A) shallow coastal waters
- (B) the environment
- (C) soil
- (D) trees
- (E) Earth orbiting the Sun
- (F) ocean water
- (G) plasma
- (H) salt and water.
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Let's think first: Marine species live mainly in shallow coastal waters. Most marine organisms live near the surface. Most organisms live mainly in shallow coastal waters.... So the answer is [(A)]

When insects move from one place to another, this usually causes
Options:
- (A) seed dispersal
- (B) Transfers energy
- (C) change in mood
- (D) death and devastation
- (E) change in population size
- (F) change in individual insect
- (G) change in shape
- (H) converting mass to energy
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Let's think first: Migration is a type of movement that changes population size. Insects can also migrate. Insects sometimes change population size by moving from one place to another.... So the answer is [(E)]