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)]

The basic functioning unit of life all share the same what?
Options:
- (A) structure
- (B) four limbs
- (C) organ
- (D) Chlorophyll
- (E) Energy
- (F) layers of fat
- (G) health
- (H) Energy.
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Let's think first: All cells share some of the same structures and basic functions. Cells are also the basic functioning unit of life. The basic functioning unit of life all share the same structures.... So the answer is [(A)]

Eyes can detect images and see light using what?
Options:
- (A) vibrations
- (B) sight
- (C) lenses
- (D) sound
- (E) Energy.
- (F) Energy
- (G) touch
- (H) voltage
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Let's think first: Sight is the ability to sense light, and the eye is the organ that senses light. Eyes detect light, organized into images that fall on the retina. Eyes can detect images and see light using sight.... So the answer is [(B)]

How long can antibodies protect the body?
Options:
- (A) As long as antibodies survive
- (B) Slowing the transfer of heat
- (C) For a set time
- (D) by keeping them warm
- (E) it protects them
- (F) Into elderly years
- (G) As long as the human survives
- (H) A compound that donates proton
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Let's think first: Passive immunity lasts only as long as the antibodies survive in body fluids. Antibodies are administered to the patient in a process called passive immunization. Antibodies are administered to patients for protection but it only helps as long as the antibodies survive in body fluids.... So the answer is [(A)]

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)]

Individuals who move into or out of a community increase:
Options:
- (A) homogeneity
- (B) energy usage
- (C) power
- (D) monoculture
- (E) competition
- (F) adding heat
- (G) population
- (H) gene flow
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Let's think first: Gene flow occurs when individuals move into or out of a population. Community health focuses on the health of populations or groups. Gene flow occurs when individuals move into or out of a community.... So the answer is [(H)]