Platyhelminthes and Nematodes

Chapter 10: The Triploblastic, Acoelomate Body Plan

Platyhelminthes (Flat worms)

Multiple Choice

The structure that detects light in the planarian flatworm is the

• pharynx

• flame cells

• Eyespots

Multiple Choice

True or False: Platyhelminthes are acoelomate

• True

• False

Multiple Choice

What type of symmetry do all worms have?

• bilateral

• radial

• asymmetry

• no symettry

Multiple Choice

What type of fertilization do flatworms use for sexual reproduction?

• internal

• external

Multiple Choice

Major characteristics of Phylum Platyhelminthes.

• Asymmetrical, diploblastic, pseudocoelomate, lack cephalization

• Bilateral symmetry, triploblastic, acoelomate, cephalization

• Radial symmetry, monblastic, acoelomate, cephalization

• Bilateral symmetry, triploblastic, coelomate, cephalization

Multiple Choice

What type of symmetry do flatworms have?

• radial
• bilateral
• no symmetry
• cephalization

Multiple Choice

How do flatworms "breath" (exchange gases with their environment)?

• using lungs

• using gills

• by diffusion through the skin

Multiple Choice

How do planarians reproduce asexually?

• laying eggs
• they don't reproduce asexually
• regeneration of missing parts
• planarians fertilize their own eggs

Multiple Choice

Planaria are members of class

• Platyhelminthes
• Cestoidea
• Turbellaria
• Trematoda

Multiple Choice

Class Tubellaria are the only flat worms that are...

• parasitic

• freeliving

• flat

• round

Multiple Choice

What is the primary host of the schistosoma blood fluke?

• Human

• Cat

• Snail

• Bat

Multiple Choice

What is the intermediate host of the Schistosoma blood fluke?

• Human

• Cat

• Snail

• Bat

Multiple Choice

What is the function of the scolex of a tapeworm?

• To attach to the intestinal wall of the host 
• To reproduce
• To get rid of waste
• To carry the eggs

Multiple Choice

This proglottid has both male and female sex organs. They are found in which class of worms?

• Cestoda
• Trematoda
• Turbellaria
• Monogenea

Multiple Choice

Which of these is a common way that parasitic worms can be transmitted?

• enter thru skin

• undercooked meat

• consuming contaminated food or water

• all of these are ways you can get worms!

Multiple Choice

What class?

• Class Cestoda

• Class Trematoda

• Class Turbellaria

• Class Monogenea

Multiple Choice

What phylum do flatworms belong too?

• Annelida

• Platyhelminthes

• Nematoda

The Triploblastic, Acoelomate Body Plan - Nematodes

Multiple Choice

Nematodes have a _____ digestive system

• incomplete (have only a mouth but no anus)

• complete (have a mouth and anus)

Multiple Choice

Roundworms have a false body cavity called

• pseudocoelom

• acoelom

• eucoelom

• coelom

Multiple Choice

Nematodes exhibit _____ symmetry.

• longitudinal

• radial

• asymmetrical

• bilateral

Multiple Choice

Round worms belong in the phylum

• Nematoda

• Cestoda

• Platyhelminthes

• Annelida

Multiple Choice

Which phylum of worms are pseudoceolomates?

• Platyhelminthes

• Nematoda

• Annelida

• all of them

Multiple Choice

Nematodes exchange gas by _____.

• digestion

• diffusion

• auricles

• the flame bulb

Multiple Choice

What habitats are Nematodes found in?

• only fresh water

• only terrestrial (land)

• almost all habitats

• only marine (saltwater)

Multiple Choice

Nematodes are protected by an outer waxy layer known as a _____.

• auricle

• pharynx

• coelom

• cuticle

Multiple Choice

In most nematodes

• the sexes are separate

• male and female organs are found in the same organism.

• they are monecious

• none of these.

Multiple Choice

This phylum contain a complete gut meaning they have a mouth and an anus

• true

• false

Multiple Choice

a fluid-filled partially in the mesoderm in which is not a true body cavity(tube within the tube)

• Pseudocoelom

• Acoelom

Multiple Choice

What is cephalization?

• Having male and female parts at the posterior end of the body..

• A concentration of sense organs and nervous system at the anterior end of the body.

• Feeding off of another organism either as a parasite or carnivore.

• Exchanging gases through a thin, moist layer of skin.

Multiple Choice

What type of symmetry do all worms have?

• bilateral

• radial

• asymmetry

• no symettry

Multiple Choice

Humans are likely to become infested by Trichinosis by doing which of the following..

• drinking dirty water

• walking outside barefoot

• eating undercooked meat

• being bitten by a mosquito

Multiple Choice

Humans are likely to become infested by Filarial worms by doing which of the following..

• drinking dirty water

• walking outside barefoot

• eating undercooked meat

• being bitten by a mosquito

Multiple Choice

Humans are likely to become infested by Ascaris worms by doing which of the following..

• drinking dirty water

• walking outside barefoot

• eating undercooked meat

• being bitten by a mosquito

Multiple Choice

Humans are likely to become infested by Hook worms by doing which of the following..

• drinking dirty water

• walking outside barefoot

• eating undercooked meat

• being bitten by a mosquito

Multiple Choice

The most common parasitic round worm infection in the United Stated is the...

• hookworms (pinworm)

• ascaris worms

• filarial worms

• trichinosis

Multiple Choice

The most common parasitic round worm infection in the the world is the...

• hookworms (pinworm)

• ascaris worms

• filarial worms

• trichinosis