Glow-in-the-Dark Animals

________________ is a chemical that helps create light in bioluminescent animals.

• Bacteria

• Luciferin

• Chemical

• Molecule

Our lungs take in ____________from the air.

• oxygen

• molecule

• bioluminescent

• camouflage

Most bioluminescent ocean animals live in the ________________, not in the sunlit zone, which is near the surface.

• luciferin

• chemical

• twilight zone

• oxygen

Animals _______________ themselves to hide from predators or to be less visible when they are hunting.

• bioluminescent

• prey

• predator

• camouflage

A ___________ is a beetle that can flash light.

• prey

• molecule

• firefly

• bacteria

Some animals, such as snakes, are both predators and ___________.

• prey

• luciferase

• bacteria

• oxygen

A lion and a great white shark are each an example of a ____________.

• camouflage

• predator

• firefly

• luciferin

______________ is a chemical that helps create light in bioluminescent animals.

• twilight zone

• luciferase

• bacteria

• chemical

______________ are microorganisms--living things too small to see with the unaided eye.

• chemical

• bacteria

• oxygen

• predators

Most _____________ animals, such as squid, live in the ocean, but a few, such as fireflies, live on land.

• luciferase

• bioluminescent

• oxygen

• predators