Mollusks Quiz

What are the three main body parts of all mollusks?

• Shell, foot, head

• Visceral mass, tentacles, shell

• Foot, head, visceral mass

• Tentacles, visceral mass, shell

Do most mollusks have a shell?

• No, most mollusks do not have a shell.

• Yes, but only a few mollusks have a shell.

• Yes, most mollusks have a shell to protect their soft body.

• No, mollusks have a hard body that doesn't require a shell.

Which of the following mollusks typically do not have a shell?

• Squids, octopus, and slugs

• Clams, snails, and oysters

• Cuttlefish, nautilus, and conchs

• Mussels, scallops, and whelks

Why is the nautilus often referred to as a "living fossil"?

• Because it is a recently discovered species.

• Because it can live for over 500 million years.

• Because it represents an ancient lineage of cephalopods dating back around 500 million years.

• Because it is the only cephalopod with a shell.

What significant event has the nautilus survived?

• A single mass extinction event.

• Multiple mass extinctions.

• The ice age.

• The extinction of dinosaurs.

Tags

NGSS.MS-LS4-1

Which of the following is a primitive feature retained by the nautilus?

• Its ability to fly.

• Its shell.

• Its tentacles.

• Its coloration.

Tags

NGSS.MS-LS4-2

What is the composition of most gastropod shells?

• Silicon dioxide

• Calcium phosphate

• Calcium carbonate

• Chitin

Which of the following is a characteristic of most gastropod shells?

• They are flat and smooth

• They spiral outward as they grow

• They are composed of multiple layers

• They are typically found detached from the organism

How do gastropods typically move?

• They swim using fins

• They use their foot to propel themselves forward

• They float on water currents

• They hop using a muscular tail

Which of the following animals is included in the gastropod group despite not having a shell?

• Crabs

• Sea slugs/hare

• Clams

• Starfish