WorksheetsPhylum Mollusca
Total questions: 33
Worksheet time: 19mins
Name
Class
Date
1.
Mollusks possess this type of skeleton.
a)
endoskeleton
b)
exoskeleton
c)
hydrostatic
d)
pneumo
2.
What type of body do all Mollusks have?
a)
Segmented
b)
Soft
c)
Rigid
d)
Clear
3.
In what type of environment do MOST mollusks live?
a)
Soil
b)
Freshwater
c)
Marine
d)
Terrestrial
4.
Which part of the Mollusk body is specialized for burrowing, feeding, and movement?
a)
trochophores
b)
visceral mass
c)
mantle
d)
foot
5.
Which class of Mollusks include organisms that all have two shells?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
6.
Which class of Mollusks includes snails, slugs, or nudibranches?
a)
Cephalapods
b)
Bivalves
c)
Gastropods
7.
Which part of the Mollusk body is the tissue covering the body and secretes the shell?
a)
Mantle
b)
Trochophore
c)
Foot
d)
Visceral Mass
8.
Which class of Mollusks is the only class with some terrestrial species?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
9.
Which part of the Mollusk body contains organs?
a)
Foot
b)
Visceral Mass
c)
Trochophore
d)
Mantle
10.
Which class of Mollusks all have tentacles?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
11.
How are all mollusks similar to annelids?
a)
They have shells
b)
The have trochophore larvae
c)
They are segmented
d)
They live in marine environments
12.
What type of symmetry do MOST mollusks have?
a)
Bilateral
b)
Radial
c)
Circular
d)
Asymmetrical
13.
Which of the following is the correct description of reproduction in Mollusks?
a)
Mostly asexual
b)
Budding
c)
Regeneration
d)
Mostly sexual
14.
Which of the following is the organ used by Mollusks for excretion?
a)
gills
b)
nephridia
c)
mantle
d)
visceral mass
15.
Which of the following is the correct description of respiration in Mollusks?
a)
They use diffusion through their moist skin and gills in marine environments
b)
They use primitive lungs in marine environments and gills on land.
c)
They use nephridia to exchange oxygen and carbon dioxide
d)
They use gills in marine environments and primitive lungs on land.
16.
Which class of Mollusks have a closed circulatory system?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
d)
All of the classes
17.
Which of the following is the correct description of the body cavity of Mollusks?
a)
They are protostome acoelomates
b)
They are protostome coelomates
c)
They are deuterostome coelomates
d)
They are protostome pseudocoelomates
18.
Which class of Mollusks include clams, oysters, and mussels?
a)
Gastropods
b)
Bivalves
c)
Cephalopods
19.
Which class of Mollusks include squid, cuttlefish and octopus?
a)
Gastropods
b)
Bivalves
c)
Caphalopods
20.
why do octopuse change there color
a)
Because they like to change colors
b)
They want to be hidden from their predators
c)
To blend in with their surrounding
21.
How big are the most squid ?
a)
33 feet long
b)
88 feet long
c)
26 feet long
22.
What is in example of gastropods ?
a)
turtle
b)
squid
c)
a sea slug
23.
a)
Class Gastropoda
b)
Class Bivalvia
c)
Class Cephalopoda
d)
Class Polyplacophora
24.
a)
Class Gastropoda
b)
Class Bivalvia
c)
Class Cephalopoda
d)
Class Polyplacophora
25.
a)
Class Gastropoda
b)
Class Bivalvia
c)
Class Cephalopoda
d)
Class Polyplacophora
26.
a)
Class Gastropoda
b)
Class Bivalvia
c)
Class Cephalopoda
d)
Class Polyplacophora
27.
Mollusk's tongue-like strip covered with teeth that point backward is called the ____
a)
trochopore
b)
radula
c)
gills
d)
visceral mass
28.
Organs that are in contact with blood supply and specialized for gas exchange
a)
trochopore
b)
radulas
c)
bivalves
d)
gills
29.
Filter-feeding bivalves can be used to monitor the environmental health of a habitat because the ____ .
a)
a. bivalves reproduce rapidly in polluted water
b)
b. bivalves concentrate pollutants and microorganisms in their tissues.
c)
c. bivalves live near deep-sea vents.
d)
d. Bivalves only live above ground.
30.
In the open circulatory system of some mollusks, blood is found
a)
in blood vessels and sinuses
b)
sinuses containing tissues
c)
only in blood vessels
d)
only in gills.
31.
28. In gastropods, food is trapped in mucus and brough into a rotating mucoid mass called the __________, which extends to the stomach. b. c. d.
a)
stylet
b)
siphonoglyph
c)
protostyle
d)
odontophore
32.
The tubelike structure through which water enters and leaves a mollusk’s body is the
a)
siphon
b)
coelom
c)
mantle
d)
operculum
33.
Which term below best describes the body cavity of Mollusks
a)
pseudocoelmate
b)
eucoelomate
c)
acoelomate
d)
incomplete coelomate
100 %
