What happens when muscular walls of arteries and veins contract?
Options:
- (A) connection
- (B) It expands
- (C) Dehydration
- (D) construction
- (E) forces
- (F) massive damage
- (G) constriction
- (H) contraction
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Let's think first: Constriction occurs when the muscular walls of blood vessels contract. Arteries and veins are blood vessels. Constriction happens when the muscular walls of arteries and veins contract.... So the answer is [(G)]

How do fungi get nutrition?
Options:
- (A) Exfoliation
- (B) agriculture
- (C) heat produced
- (D) Cooking
- (E) absorb it
- (F) Energy
- (G) Evaporation
- (H) glucose
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Let's think first: Fungi lack chlorophyll, so they cannot make food by photosynthesis as plants can. Fungi are multicellular organisms that absorb their food molecule by molecule. Fungi lack chlorophyll, so they must absorb nutrition molecule by molecule.... So the answer is [(E)]

What are flower cell walls made of?
Options:
- (A) cellular
- (B) lmestone
- (C) cellulitis
- (D) strong
- (E) cellulose
- (F) cellulite
- (G) heat energy
- (H) acetic acid
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Let's think first: Plants are multicellular eukaryotes with cell walls made of cellulose. Flowers are plant organs of reproduction. Flowers are multicellular eukaryotes with cell walls made cellulose.... So the answer is [(E)]

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)]

What is required before a chemical change?
Options:
- (A) kinetic energy
- (B) energy usage
- (C) activation push
- (D) activation energy
- (E) activation switch
- (F) activation power
- (G) Burning fuel and air
- (H) Evaporation
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Let's think first: All chemical reactions require activation energy to get started. Chemical changes are a result of chemical reactions. Activation energy must be used before a chemical change happens.... So the answer is [(D)]

Escaping poor weather and food supply changes what?
Options:
- (A) population age
- (B) the environment
- (C) population education
- (D) general preferences
- (E) important habitats
- (F) population size
- (G) movement
- (H) an organism's body
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Let's think first: Migration is a type of movement that changes population size. Birds migrate to escape poor weather and food supply. Escaping poor weather and food supply changes population size.... So the answer is [(F)]