question: Most _ feed on bacteria and algae that use sunlight to make food.
Options:
- (A) Energy
- (B) Lobsters
- (C) Most plants
- (D) Seaweed
- (E) Starfish
- (F) plant life
- (G) Copepods
- (H) energy usage
answer: Phytoplankton are bacteria and algae that use sunlight to make food. Most copepods feed on phytoplankton. Most copepods feed on bacteria and algae that use sunlight to make food.
The answer is (G)

question: Where does energy enter into in the form of sunlight and chemical compounds?
Options:
- (A) sun
- (B) science lab
- (C) biomes
- (D) orchids
- (E) photons
- (F) deserts
- (G) black hole
- (H) trees
answer: Energy enters ecosystems in the form of sunlight or chemical compounds. Biomes are global ecosystems. Energy enters biomes in the form of sunlight or chemical compounds.
The answer is (C)

question: Adult sponges are
Options:
- (A) warm
- (B) immobile
- (C) food
- (D) parasites
- (E) strong
- (F) white
- (G) fertile
- (H) warm-blooded
answer: Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are attached permanently, immobile.
The answer is (B)

question: What relies on a relatively narrow range of something you can measure with paper strips?
Options:
- (A) Length
- (B) voltage
- (C) all life
- (D) mammals
- (E) humans
- (F) Most plants
- (G) agriculture
- (H) animals
answer:
All life relies on a relatively narrow range of pH, or acidity. Acidity is measured with a pH meter or with pH paper strips. All life relies on a relatively narrow range of something you can measure with paper strips.
The answer is (C)