Question

1. Most bivalve molluscs are filter-feeders that use their _____ to collect phytoplankton and other food particles from the water.

a. palps

b. gills (ctenidia)

c. shells

d. mouths

2. The _____ is the only living cephalopod with a large, external shell.

a. squid

b. octopus

c. cuttlefish

d. Nautilus

3. All true crabs have a _____ abdomen.

a. large, straight

b. small, flexed

c. fleshy

d. spiny

4. Octopuses change their skin color with structures called_____________ that are responsive to light.

a. Nematocysts

b. Chromatophores

c. Cerrata

d. Radula

5. Octopuses use their ______________ to taste.

a. Radula

b. Siphon

c. Beak

d. Suckers

Answer 1

Answer :

1. (b). Gills (Ctenidia)

2. (d). Nautilus

3. (b). Small, flexed

4. (b). Chromatophores

5. (d). Suckers

1. Most bivalve molluscs are filter-feeders that use their --- (b). Gills (Ctenidia) --- to collect phytoplankton and other food particles from the water.

2. The --- (d). Nautilus --- is the only living cephalopod with a large, external shell.

3. All true crabs have a --- (b). Small, flexed --- abdomen.

4. Octopuses change their skin color with structures called --- (b). Chromatophores --- that are responsive to light.

5. Octopuses use their --- (d). Suckers --- to taste.