Biology 202 Test 3- Acoelomorpha And Platyhelminthes

Front 1

What is this an image of?

Back 1

Acoelomorpha

Front 2

What is this an image of?

Back 2

Platyhelminthes

Front 3

Acoelomorpha and Platyhelminthes have ____________ bodies.

Back 3

triploblastic

Front 4

What are general characteristics of Acoelomorpha?

Back 4

1. their gut is either absent or sac-like without an anus
2. they are small flat worms
3. they have statocysts and ocelli

Front 5

How do Acoelomorpha asexually reproduce?

Back 5

Fragmentation

Front 6

How do Acoelomorpha sexually reproduce?

Back 6

Hermaphrodites + larvae

Front 7

What are 2 general characteristics of Platyhelminthes?

Back 7

1. over 80% of all species are parasites
2. they can be marine, freshwater, or terrestrial

Front 8

What is the osmoregulatory system and where is it most common?

Back 8

it controls the water balance in animals and is most common in freshwater animals to adjust concentration gradients between internal and external fluids

Front 9

What is Protonepheridium?

Back 9

Primitive osmoregulatory and
excretory organ consisting of flame cells

Front 10

The asexual reproduction for free-living fresh and saltwater flatworms is a process called:

Back 10

fission

Front 11

Asexual reproduciton for parasitic flatworms is called:

Back 11

budding

Front 12

In sexual reproduction, free-living fresh water flatworms embryos emerge as _________.

Back 12

juveniles

Front 13

In sexual reproduction, free-living marine water flatworm embryos develop into __________ __________.

Back 13

Mullers larva

Front 14

In parasitic forms, there are several larva stages possible depending on the species. (T/F)

Back 14

T

Front 15

What are 2 characteristics of the Class Tubellaria

Back 15

• they can be terrestrial
• they are distinguished by the form of the gut and the pharynx

Front 16

What are the Class Trematoda?

Back 16

parasitic flukes

Front 17

What is the first and final host of the class Trematoda?

Back 17

first: molusk

final: vertebrate

Front 18

What are 3 of the class trematoda's adaptations to parasitism?

Back 18

1. penetration glands
2. adhesion organs
3. high reproductive capacity

Front 19

What are 3 characteristics of the Class Monogenea?

Back 19

• they are parasitic
• they are small and cause little damage to the host
• they have one larval stage

Front 20

What are 3 characteristics of the class Cestoda?

Back 20

1. long flat bodies with no head
2. capable of self fertilization
3. no digestive system

Front 21

What class does the Tape Worm belong to?

Back 21

The class Cestoda