Molluscs and Annelids

Which is not a molluscs?

• Octopus

• snail

• Crabs

• Clams

What is not a characteristic of cephalopods?

• Marine

• predators

• No shells at all

• closed circulatory system

What is the function of the radula in gastropods?

• Detecting temperature and pressure

• Producing sound for communication

• Storing water and nutrients

• Scraping and feeding

How do bivalves obtain their food?

• Hunting for prey

• Scavenging for dead organisms

• Filter feeding

• Photosynthesis

What is the main defense mechanism of cephalopods?

• Hard exoskeleton

• Camouflage

• Venomous stingers

• Loud vocalization

Which is the major difference between the two divisions of annelids,

the errantians and sedentarians?

• sedentarians are less mobile than errantians

• sedentarians are more mobile than errantians

• sedentarians contain parapodia

• errantians include leeches

  sedentarians are all marine organisms

What is the primary method of obtaining food for annelids?

• Hunting for prey

• Scavenging for dead organisms

• Filter feeding

• Photosynthesis

Which of the following is the locomotion structure of Errantians?

• parapodia

• cilia

• Cirri

• flagella

What is the primary defense mechanism of bivalves?

• Hard exoskeleton

• Camouflage

• Venomous stingers

• Loud vocalization

Hosts of leeches usually are not aware of the attachment of leech beacause _________.

• they secrete hirudin

• they secrete anesthetics

• they secrete antibiotics

• they make no sound