This helps with sensing and maintaining body position:
Options:
- (A) lightheaded
- (B) sweating
- (C) inner ear
- (D) cochlea
- (E) four limbs
- (F) nerves
- (G) Riding a bike
- (H) dizzy
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Let's think first: Balance is the ability to sense and maintain body position. Another part of the inner ear is used for balance. The inner ear helps with sensing and maintaining body position.... So the answer is [(C)]
What does fire require to get started?
Options:
- (A) an engine
- (B) activation energy
- (C) water
- (D) energy usage
- (E) direct energy
- (F) dogs
- (G) activated almonds
- (H) adding heat
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Let's think first: All chemical reactions require activation energy to get started. Fire is a chemical reaction. Fire requires activation energy to get started.... So the answer is [(B)]
Some birds are pollinators that co-evolved with what other type of organism?
Options:
- (A) animals
- (B) humans
- (C) vegetation
- (D) producers
- (E) parasites
- (F) warm-blooded
- (G) Conifers
- (H) mammals
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Let's think first: Some birds are pollinators that co-evolved with plants. If the plant is green, it is a producer. Some birds are pollinators that co-evolved with producers.... So the answer is [(D)]
What is an arthopod with two wings?
Options:
- (A) rare
- (B) fly
- (C) two
- (D) host
- (E) Aves
- (F) male
- (G) bird
- (H) bats
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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)]
Bottleneck effect can occur with 
Options:
- (A) external migration
- (B) direct damage to the lungs
- (C) Movement of an air mass
- (D) competition
- (E) if humans disturb bears
- (F) competing for resources
- (G) Plant growth is reduced
- (H) Temperature changing
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Let's think first: Bottleneck effect occurs when a population suddenly gets much smaller. Population growth is reduced by external migration. Bottleneck effect occurs with external migration.... So the answer is [(A)]
Endocrine hormones move from place to place through the
Options:
- (A) animals
- (B) ovaries
- (C) Man
- (D) humans
- (E) blood
- (F) hair
- (G) skin
- (H) scales
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Let's think first: Endocrine hormones travel throughout the body in the blood. For the tourists, there are many places to travel. Endocrine hormones move from place to place in the body through the blood.... So the answer is [(E)]