Name Date Class

Mollusks, Arthropods, and Echinoderms • Guided Reading and Study

Insect EcologyThis section describes the role of insects in thefood chain. It also tells about theinteractions between insects and the environment.

Use Target Reading Skills

After you read the section in your textbook, reread the paragraphs that contain definitions ofKey Terms. use all the information you have learned to write a meaningful sentence.

food chain:

ecology:

producer:

consumer:

decomposer

pollinator:

pesticide:

biological control:

Insects and the rood Cha:"

1, Is the following sentence true or false? About 50 percent of crops grown for human

consumption are eaten by insects.

2. Is the following sentence true or false? Insects play key roles jn

(ood chains.

Date ClassName

Mollusks, Arthropods, and Echinoderms • Guided Reading and Study

3. An organism that eats wastes and dead organisms is called a

Other Interactions

4. What does a pollinator do?

5. Name two types of insects that spread diseases.

Controlling Pests

6. Is the following sentence true or false? Pesticides used to kill harmfulinsects can also kill pollinators and can harm other animals.

7. Introducing natural insect predators or natural insect diseases, calledis a method of getting rid of harmful insects.

Name Date Class

Mollusks, Arthropods, and Echinoderms • Guided Reading and Study

EchinodermsThis section tells about btnnpy-skinned animals called echinodertns.

Use Target Reading Skills

Preview the figure in your textbook showing a sea star 's water vascular system.

Then write two questions that you have about the diagram in the graphic organizer

below. As you read, answer vour questions.

Water Vascular System

Q. What are tube fet o

Q.

Characteristics of Echinoderms

What is an echinoderm?1.

skin of most echinoderms is stretched over an unternal skeletorv

2.

3 IS a water vascular system'

Name Date Class

Mollusks, Arthropods, and Echinoderms • Guided Reading and Study

4. Label the parts of a sea star's water vascular svstpm in thp diacrrambelow.

3

Diversity of Echinoderms

5. Is the following sentence true or false? A sea star forces its stomach into

the opening of a clam's shell to digest the clam's body.

6. Complete the table about the characteristics of other echinoderms.

Characteristics of Other Echinoderms

Brittle Stars Sea UrchinsCharacteristics Sea Cucumbers

How they get food

Movement

@ Peorson Educonon, Inc , publishing as Pearson hennce Holl All nghts teserved