PHYLUM MOLLUSCA

Question 1

about 23% of all known marine organisms are

Answer 1

molluscs

Question 2

it is the predominant phyum in marine environments but they can also be found in freshwater and terrestrial habitats

Answer 2

mollusca

Question 3

they are the second most diverse phylum of animals after the arthropods

Answer 3

mollusca

Question 4

is derived from the french mollusque

Answer 4

mollusk

Question 5

mollusk is derived from the french word

Answer 5

mollusque

Question 6

the words mollusk is derived from the french mollusque which originated form the latin word

Answer 6

molluscus

Question 7

mollis means

Answer 7

soft

Question 8

its means soft and refers to the soft body of these animals

Answer 8

mollis

Question 9

the scientific study of mollusks is accordingly called

Answer 9

malacology

Question 10

they display a wide range of morphologies but all share a few key characteristics

Answer 10

mollusks

Question 11

3 key characteristics of mollusks

Answer 11

muscular foot
visceral mass
mantle

Question 12

it contains internal organs

Answer 12

visceral mass

Question 13

usually secretes a shell of calcium carbonate

Answer 13

mantle

Question 14

mantle usually secretes a shell of

Answer 14

calcium carbonate

Question 15

most mollusks are ———–

Answer 15

herbivorous

Question 16

most mollusks are herbivorous grazing on —– or ——

Answer 16

algae or filter feeders

Question 17

for grazing molluska use their

Answer 17

radula

Question 18

a file like mouthpart unique to the phylum molluska

Answer 18

radula

Question 19

they use their radula as a rake of rasp

Answer 19

mollusks

Question 20

mollusks use their radula as a —- or —–

Answer 20

rake or rasp

Question 21

they strain suspended matter and food particle from water by passing the water over their gills

Answer 21

filter feeder

Question 22

they use their radula to seize , bore through and or cut their prey

Answer 22

predatory mollusks

Question 23

many mollusks rely on external

Answer 23

fertilization

Question 24

all molluscs produce eggs from which emerge a

Answer 24

tropochore larva

Question 25

it is planktonic and feeds on floating food particles by using the two bands of cillia around its "equator" to sweep food into the mouth

Answer 25

tropochore larva

Question 26

becasue of tropochore larva he protostome development and tru coelom of mollusk are place in the

Answer 26

lophotrochozoa

Question 27

3 distinguihed groups of mollusks

Answer 27

gastropods bivalves cephalopods

Question 28

also known as belly foot

Answer 28

gastropods

Question 29

the most diverse lineage of molluscs which includes snails and slugs

Answer 29

gastropods

Question 30

are usually appreciated as "sea food"

Answer 30

bivalves

Question 31

they have a shell of two valves

Answer 31

bivalves

Question 32

they are the clams, mussels, oysters and scallops

Answer 32

bivalves

Question 33

uch as squids, nautiluses, octupi, and cuttlefish

Answer 33

cephalopods

Question 34

their foot is modified to form tentacles

Answer 34

cephalopods