Marine Worms & Lophophorates Review

Match the marine worm phyla to its characteristics

• Annelida

• Flatworms (flat bellies & backs)

• Playthelminthes

• Roundworms (small, round bodies with pointed ends; a.k.a. nematodes)

• Nematoda

• Segmented worms (coelom, well developed brain)

• Chaetognatha

• Ribbon worms (long compressible body & proboscis)

• Nemertea

• Arrow worms (transparent body with fish like features)

True or False: The brain of most marine worms consists of a simple cluster of nerve cells

• True
• False

Tags

NGSS.MS-LS4-2

Almost all marine worms belong to which phylum?

• Annelida
• Chaetognatha
• Nematoda
• Nemertea
• Platyhelminthes

Some marine worms, like nematodes, have a ________ which provides them with support and aids in locomotion

• Coelom
• Proboscis
• Lophophore
• Hydrostatic skeleton

Tags

NGSS.MS-LS4-2

Which phylum of marine worms are considered to be the simplest? (Hint: It's the only one with a blind gut!)

• Annelida
• Chaetognatha
• Nematoda
• Nemertea
• Platyhelminthes

Which phylum of marine worms are considered to be the most complex?

• Annelida
• Chaetognatha
• Nematoda
• Nemertea
• Platyhelminthes

What ecological roles can marine worms play?

• Carnivores
• Decomposers/deposit feeders/nutrient recyclers
• Herbivores
• Parasites
• Producers

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Marine worms & lophophorates have ___ germ layer(s) making them ________________________

• 1 ; monoblastic
• 2 ; diploblastic
• 3 ; triploblastic
• 4 ; quadroblastic

Tags

NGSS.MS-LS4-3

Marine worms and lophophorates display what type of symmetry?

• Asymmetry
• Bilateral
• Radial

Match the animal group to its reason of importance to scientific research

Groups:

(a) Marine Worms

,

(b) Lophophorates

,

(c) Both

• Recycle nutrients as deposit feeders & decomposers

• Improve water quality by filter feeding

• Parasites on many marine creatures

• Stir up sediment mixing minerals and increasing oxygen availability

• Important food source for other organisms

• Indicators of ecosystem health due to extreme sensitivity to changing environmental conditions

• Contribute to building on coral reefs

• Create burrow homes for other animals

• Create microhabitats for small organisms

Tags

NGSS.MS-LS2-5