Platyhelminthes and Annelids

Question 1

What are flatworms and consist of free-living and parasitic organisms?

Answer 1

Platyhelminthes

Question 2

What are the characteristics of Palyhelminthes?

Answer 2

1. Bilateral symmetry
2. definite polarity of anterior and posterior ends
3. dorsoventrally flattened body
4. highly organized nervous system

Question 3

What platyhelminth class are mostly free-living, with ciliated epidermis?

Answer 3

Turbellaria

Question 4

What platyhelminth class are monogenetic parasitic flukes mostly on skin and gills of fish and attach to host with hooks?

Answer 4

Monogenea

Question 5

What platyhelminth class are digenetic flukes, lack hooks, and are parasitic in all vertebrate classes?

Answer 5

Trematoda

Question 6

What platyhelminth class are tapeworms, scolex with suckers or hooks, no digestive organs and digestive tract parasite in all vertebrate classes?

Answer 6

Cestoda

Question 7

What are segmented worms?

Answer 7

Annelida

Question 8

What are the characteristics of annelids?

Answer 8

1. Bilaterally symmetrical
2. tubular body is divided into ringlike segments called annuli
3. exhibit metamerism or true segmentation

Question 9

What annelid class are marine segmented worms and most are dioecious?

Answer 9

Polychaeta

Question 10

What annelid class are freshwater and earthworms, hermaphroditic and have less developed heads and setae?

Answer 10

Oligochaeta

Question 11

What annelid class are leeches and are mostly bloodsucking vertebrates and lack setae?

Answer 11

Hurdinea