Mollusks, Arthropods & Echinoderms Life Sci

[Pages:2]Mollusks, Arthropods & Echinoderms

Life Sci

Name ____________________________ Class __________________ Date ____________

1 Which is a characteristic of a mollusk?

Circle the answer letter.

a. segmented body b. unsegmented body c. unicellular d. prokaryote

6 Crustaceans are _________ with

appendages for chewing and two or three body segments.

a. arthropods b. gastropods c. bivalves

2 The _________ is a thin layer of tissue

that covers the internal organs of mollusks.

a. kidney b. radula c. mantle

7 Fill in the answers.

Insects have _______ body segments.

The _______________ is the middle section to which wings are attached.

3 A mollusk's _________ is a structure that is

bendable and it is covered in small teeth, which scrape against their food.

a. kidney

b. radula

c. mantle

8 A(n) _________ is an invertebrate that is

radially symmetrical and lives on the floor of the ocean.

a. mollusk

b. echinoderm

c. arthropod

4

Please Sign In or Sign U9p Tthoe ___d__o__w__nolfoecahdinoderms is made

_________ have the most advanced brain

up of a series of tubes inside the body

of all inverttehbreateps.riTnhetyahbavlee evxceelrlesniton of thtihsrouwghowrhkicshhfleuidestrun.

vision and the ability to learn from their

environment. Circle the answer.

a. water vascular system

Gastropods Sponges

b. respiratory system c. reproductive organs

Cephalopods Bivalves

5 Fill in the answer.

10 Which animal is not an arthropod?

Cross it out.

_____________________

is a process in which an organism's body changes dramatically during its overall life cycle.

? Copyright MMXVI NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to make copies for non-commercial educational purposes only. Visit us at

Mollusks, Arthropods & Echinoderms - Answer Key

Life Sci

Name ____________________________ Class __________________ Date ____________

1 Which is a characteristic of a mollusk?

Circle the answer letter.

a. segmented body b. unsegmented body c. unicellular d. prokaryote

6 Crustaceans are _________ with

appendages for chewing and two or three body segments.

a. arthropods b. gastropods c. bivalves

2 The _________ is a thin layer of tissue

that covers the internal organs of mollusks.

a. kidney b. radula c. mantle

7 Fill in the answers.

Insects have ___3____ body segments.

The ____t_h_o__r_a_x_____

is the middle section to which wings are attached.

3 A mollusk's _________ is a structure that is

bendable and it is covered in small teeth, which scrape against their food.

a. kidney

b. radula

c. mantle

8 A(n) _________ is an invertebrate that is

radially symmetrical and lives on the floor of the ocean.

a. mollusk

b. echinoderm

c. arthropod

4

Please Sign In or Sign U9p Tthoe ___d__o__w__nolfoecahdinoderms is made

_________ have the most advanced brain

up of a series of tubes inside the body

of all inverttehbreateps.riTnhetyahbavlee evxceelrlesniton of thtihsrouwghowrhkicshhfleuidestrun.

vision and the ability to learn from their

environment. Circle the answer.

a. water vascular system

Gastropods Sponges

b. respiratory system c. reproductive organs

Cephalopods Bivalves

5 Fill in the answer.

__M__e__t_a_m__o__r_p_h_o__s_i_s__

is a process in which an organism's body changes dramatically during its overall life cycle.

10 Which animal is not an arthropod?

Cross it out.

? Copyright MMXVI NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to make copies for non-commercial educational purposes only. Visit us at

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