Mollusk and Arthropod Review

What is an invertebrate?

• An animal with a backbone
• a mammal
• An animal without a backbone
• birds

What type of symmetry do MOST mollusks have?

• Bilateral
• Radial
• Circular
• Asymmetrical

Which part of the Mollusk body is the tissue covering the body and secretes the shell?

• Mantle
• Trochophore
• Foot
• Visceral Mass

Which class of Mollusks include organisms that have camera-like eyes similar to humans?

• Gastropods
• Bivalves
• Cephalopods

Which class of Mollusks all have tentacles?

• Gastropods
• Bivalves
• Cephalopods

Which class of Mollusks have the most advanced nervous system?

• Gastropods
• Bivalves
• Cephalopods

The ________ is a structure covered in chitinous teeth that some mollusk use during feeding.

• mantle

• radula

• foot

• gill

Clams use __________ to take in and expel water.

• radula

• foot

• siphon

• gills

____________ help cephalopods change color to hide from prey or communicate with potential mates

• gills

• tentacles

• chromatophores

• skin cells

Which of the following would be most likely to happen if they oyster beds in Aransas Bay died from a hard winter freeze?

• The shells would accumulate in the bayous and prevent freshwater from entering the bay

• Sea birds would die from a lack of pearls to eat

• The water would begin to become murkier and more polluted

• The octopus population would boom due to easy to obtain food