12c

Question 1

Bilateral Symmetry

Answer 1

There are two equal sides to an animal and one mirrors the other side.

Question 2

Long Planarian

Answer 2

Is a free living flatworm in freshwater. NOT saltwater.

Question 3

Parasitic

Answer 3

Is when an animal lives inside of another host. Parasite flatworms get nourishment from host. Can eventually kill host.

Question 4

Ganglia

Answer 4

Worms nervous system. They have nerve tissue throughout body. Sometimes is called simple brain. Many invertebrates have several of them.

Question 5

Stimulus

Answer 5

Something causes a reaction in an organism. Whatever receives it turns it into impulse. Travels to ganglion. Sends to structures for response.

Question 6

Eyespots

Answer 6

Planarians have these. Make it look cross eyed. Sensitive to light. Light is negative.

Question 7

Pharynx

Answer 7

Part of digestive system. Eat by extending muscular tube through mouth. Enzymes digest food.

Question 8

Hermaphroditic

Answer 8

When an animal has both male and female reproducing parts.

Question 9

Regeneration

Answer 9

When planarian is cut in half and regrows other cut off half.

Question 10

Roundworm

Answer 10

Have a round tubular body, tapered at each end. Can be serious parasites. Some are free living.

Question 11

Ascaris

Answer 11

Roundworm that is a parasite. Lives in animal intestines. As long as 12 inches.