Lesson 20 Lecture notes

Question 1

Flukes are

1. Platyhelminthes
2. Nematoda
3. Annelida

Answer 1

1. Platyhelminthes

Question 2

Flukes are

1. Free living
2. parasitic, requiring two hosts
3. parasitic, requiring one host

Answer 2

2. parasitic, requiring 2 hosts

Question 3

Flukes have

1. a simple digestive system, one opening
2. a simple digestive system, two openings

Answer 3

1. a simple digestive system, one opening

Question 4

Flukes have what sort of nervous system?

Answer 4

Simple, ganglion with two nerve cords

Question 5

Flukes have what sort of circulatory system?

Answer 5

none

Question 6

How many hosts do flukes need?

Answer 6

two

Question 7

Flatworms are

1. Platyhelminthes
2. Nematoda
3. Annelida

Answer 7

1. Platyhelminthes

Question 8

Flatworms are

1. Free living
2. parasitic, requiring two hosts
3. parasitic, requiring one host

Answer 8

2. parasitic, requiring two hosts

Question 9

Flatworms have

1. a simple digestive system, one opening
2. a simple digestive system, two openings

Answer 9

no digestive system- they absorb nutrients from their host

Question 10

Flatworms have what sort of nervous system?

Answer 10

Simple, ganglion with two nerve cords

Question 11

Flatworms have what sort of circulatory system?

Answer 11

none

Question 12

How many hosts do flatworms need?

Answer 12

two

Question 13

Planarians are

1. Platyhelminthes
2. Nematoda
3. Annelida

Answer 13

1. Platyhelminthes

Question 14

Planarians are

1. Free living
2. parasitic, requiring two hosts
3. parasitic, requiring one host

Answer 14

1. Free living

Question 15

Planarians have

1. a simple digestive system, one opening
2. a simple digestive system, two openings

Answer 15

1. a simple digestive system, one opening

Question 16

Planarians have what sort of nervous system?

Answer 16

Simple, ganglion with two nerve cords

Question 17

Planarians have what sort of circulatory system?

Answer 17

none

Question 18

What do planarians have that Flukes and Flatworms don’t have?

Answer 18

eyespots

Question 19

Annelida have smooth skin because —–

Answer 19

gas exchange- breathing

Question 20

Segmented worms have a small

Answer 20

brain

Question 21

Nematoda and Annelida look like

Answer 21

a tube within a tube (Annelida have rings)

Question 22

Both Nematoda and Annelida reproduce —–

Answer 22

sexually, though Annelida are hermaphroditic