Worms

Question 1

Choose the best word to complete each sentence. Worms are the simplest organisms that have a , which is made up of a knot of nerve tissue found in the . Worms also have organs that provide information about the environment, such as light, touch, or vibration.

Revolt · Accepted Answer

Part 1: brain; Part 2: head; Part 3: sense

Question 2

flatworms✔ roundwormssegmented worms

Revolt · Accepted Answer

roundworms

Question 3

✔ flatwormsroundwormssegmented worms

Revolt · Accepted Answer

flatworms

Question 4

Which flatworm has eyespots that detect light?

Revolt · Accepted Answer

planarian

Question 5

Which flatworm uses hooks and suckers to attach itself to the intestines of its host?

Revolt · Accepted Answer

tapeworm

Question 6

What are some of the benefits of roundworms? Check all that apply.They help purify sources of fresh water.They feed on pests like termites, fleas, and ants.They can be used to treat patients with blood clots.They break down organic matter in the soil.They aid in nutrient cycling.

Revolt · Accepted Answer

They feed on pests like termites, fleas, and ants.; They break down organic matter in the soil.; They aid in nutrient cycling.

Question 7

Explain how setae differ among earthworms, marine worms, and leeches.

Revolt · Accepted Answer

Earthworms have four pairs of setae on each body segment which they use for movement. Marine worms have many setae that are typically found in bundles. Leeches do not have any setae.

Question 8

Which segmented worm may be used in medicine to prevent or break down blood clots?

Revolt · Accepted Answer

leech

Question 9

✔ flatwormsroundwormssegmented worms

Revolt · Accepted Answer

flatworms; Selection 1: flatworms; Selection 2: segmented worms; Selection 3: segmented worms; Selection 4: roundworms; Selection 5: flatworms

Question 10

flatwormsroundworms✔ segmented worms

Revolt · Accepted Answer

segmented worms

Worms Answers

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