What do phytoplankton and algae need in order to make energy?
Options:
- (A) water
- (B) glucose
- (C) food
- (D) sunlight
- (E) bacteria
- (F) Light
- (G) adding heat
- (H) The Sun
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Let's think first: Phytoplankton are bacteria and algae that use sunlight to make food. Food gives energy. Phytoplankton and bacteria are algae that use sunlight to make energy.... So the answer is [(D)]

What occurs when cell walls ease up?
Options:
- (A) root growth
- (B) air cools
- (C) dilation
- (D) sweating
- (E) Dehydration
- (F) recovery
- (G) Exfoliation
- (H) less water
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Let's think first: Dilation occurs when cell walls relax. Slowly leg muscles ease up and shoulders relax. Dilation occurs when cell walls ease up.... So the answer is [(C)]

Mutations that lead to cancer usually effect genes that aid in what?
Options:
- (A) illness
- (B) health
- (C) disease
- (D) blood transfer
- (E) chemotherapy
- (F) respiraration
- (G) mitosis
- (H) recovery
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Let's think first: Mutations that lead to cancer usually occur in genes that control the cell cycle. Mitosis is part of the cell cycle. Mutations that lead to cancer usually occur in genes aiding in mitosis.... So the answer is [(G)]

Sperm and egg nuclei combine to do what?
Options:
- (A) combine genes
- (B) rapid expansion
- (C) fertilize gametes
- (D) reproduce
- (E) allow growth
- (F) build proteins
- (G) spread flower seeds
- (H) remove eggs
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Let's think first: Fertilization of gametes produces a diploid zygote. Sperm and egg nuclei combine to form the diploid zygotic nucleus 2. Sperm and egg nuclei combine to fertilize gametes.... So the answer is [(C)]

What happens to bamboo throughout its life?
Options:
- (A) It helps them survive
- (B) it has cellular respiration
- (C) it dies and comes back to life
- (D) it continues to grow
- (E) it needs no water
- (F) it keeps an organism warm
- (G) flow of electrons
- (H) the body's largest organ
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Let's think first: Most plants continue to grow throughout their lives. Bamboos are vigorous, rugged plants. Bamboo continue to grow throughout their lives.... So the answer is [(D)]

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)]