Simple and Compound Sentence

State whether the following sentences are simple sentences or compound sentences.

Colour-blind people cannot distinguish between the colours read and green.

• simple sentence

• compound sentence

Moths usually fly at night, and butterflies fly during the day.

• simple sentence

• Compound sentence

A lobster may easily replace a lost claw.

• Simple sentence

• Compound sentence

The brown pelican dives for fish; the white pelican scoops the fish from the water's surface.

• simple sentence

• compound sentence

The earthworm has no lungs.

• simple sentence

• compound sentence

The fastest animal is the cheetah.

• simple sentence

• compound sentence

The walrus, like a seal, is a marine animal.

• simple sentence

• compound sentence

Most insects have feelers and wings, but spiders do not have either.

• simple sentence

• compound sentence

A grain of sand in the shell of an oyster may eventually become a pearl.

• simple sentence

• compound sentence

The human brain is smarter, but the computer works faster.

• simple sentence

• compound sentence