Saltwater excretion reduces what?
Options:
- (A) emissions
- (B) dehydration
- (C) light energy
- (D) bacteria
- (E) sweat
- (F) energy usage
- (G) evaporation
- (H) body heat
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Let's think first: Sweating reduces body heat. Sweat is made of salt and water. Saltwater excretion reduces body heat.... So the answer is [(H)]

Biomass is the total mass of living things at each what?
Options:
- (A) trophic level
- (B) important habitats
- (C) Energy.
- (D) food and shelter
- (E) Power plants
- (F) animals
- (G) body water
- (H) heat energy
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Let's think first: Biomass is the total mass of organisms at a trophic level. Most living things are called organisms. Biomass is the total mass of living things at a trophic level.... So the answer is [(A)]

All animals are what?
Options:
- (A) consumers
- (B) all matter
- (C) insects
- (D) aquatic
- (E) plants
- (F) furry
- (G) parasites
- (H) infected
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Let's think first: All animals are heterotrophs. All consumers are also called Heterotrophs. All animals are consumers.... So the answer is [(A)]

Organisms that live in the ocean are adapted to
Options:
- (A) purified water
- (B) the environment
- (C) Absorb light
- (D) air
- (E) survival
- (F) salt water
- (G) murky water
- (H) produce light
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Let's think first: Organisms that live in marine biomes must be adapted to the salt in the water. Some familiar examples of biomes include tundra, desert, chaparral, and open ocean. Organisms that live in the ocean must be adapted to the salt water.... So the answer is [(F)]

What may become unbalanced if the rate of breathing is too fast or too slow?
Options:
- (A) meiosis
- (B) rain levels
- (C) photosynthesis
- (D) blood acidity
- (E) an organism's body
- (F) Veins and arteries.
- (G) kinetic energy
- (H) swamp vegetation
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Let's think first: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Acidity is measured with a pH meter or with pH paper strips. Blood acidity may become unbalanced if the rate of breathing is too fast or too slow.... So the answer is [(D)]

Flowing water from a mountain can dissolve carbon in what kind of rock?
Options:
- (A) magma
- (B) loose soil
- (C) loose dirt
- (D) precipitation
- (E) pumice
- (F) limestone
- (G) wind and rain
- (H) andesite
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Let's think first: Flowing water can slowly dissolve carbon in sedimentary rock. Limestone is a type of sedimentary rock. Flowing water can slowly dissolve carbon in limestone.... So the answer is [(F)]