BSC 2011L - Lophotrochozoa

Annelids exhibit a ______________________ body plan.

Segmented

Which of the following clades are NOT in the Phylum Platyhelminthes? a. Anthozoans b. Turbellaria c. Trematoda d. Cestoda

a. Anthozoans

Organisms that have a distinct head region, that contains sense organs, are exhibiting ______________________. a. Cephalization b. Cephlapodification c. Sessilization d. Skullification

a. Cephalization

Is this squid male or female? a. Male b. Female

a. Male

What is the structure labeled E in the photo of the clam? Hint: this structure secretes the shell. a. Mantle b. Siphon c. Foot d. Gills

a. Mantle

What important ecosystem service do earthworms provide? a. Aerate soil b. Excrete nutrients into the soil c. Attack insects that destroy plant roots d. Aerate soil and excrete nutrients but they do not attack insects

d. Aerate soil and excrete nutrients but they do not attack insects

This organism resembles a clam but is actually a lophotrochozoan. It filter feeds with its lophophore. What phylum does this organism belong to? a. Anthophyta b. Mollusca c. Bivalvia d. Brachipoda

d. Brachipoda

Organisms from the class ___________________________ exhibit ______________________, which is the twisting of organs within a shell.

Gastropoda ; torsion

What are these structures in the squid?

Gills

What is the structure labeled B in the photo of the clam? Hint: These structures allow the clam to take in oxygen from the water and also help move food particles towards the mouth. a. Mantle b. Siphon c. Foot d. Gills

d. Gills

Tapeworms, within the clade Cestoda, have four main body regions. Which one is shown in the image? a. Scolex b. Immature Proglottid c. Mature Proglottid d. Gravid Proglottid

d. Gravid Proglottid

This class of mollusks includes organisms which have enlarged, highly developed brains and heads surrounded by tentacles.

Cephalopoda

This structure, called the _______________, produces ink which the squid uses to deter predators.

Ink Sac

These mollusks are found on wave-swept rocky shores in the intertidal zone. What class do they belong to?

Polyplacophora

Which of the following is not true about squid arms and tentacles?

Squid have eight tentacles and two arms

What is the ecological importance of bivalves?

They filter water and are indicators of water quality.

What is structure C and what is its purpose? a. Pharynx; to help the worm suck in soil and detritus b. Crop; stores food before it is digested c. Gizzard; muscular digestion which grinds food d. Intestine; chemical digestionn

a. Pharynx; to help the worm suck in soil and detritus

These mollusks are found on wave-swept rocky shores in the intertidal zone. What class do they belong to? a. Polyplacophora b. Cephlapoda c. Bivalvia d. Lycopoda

a. Polyplacophora

What is the difference between Errantia and Sedentaria? a. Sedentaria are sedentary or slow-moving, while most Errantia are free-living predators b. Errantia are sedentary or slow-moving, while most Sedentaria are free-living predators c. Sedentaria is extinct and Errantia are extant d. Sedentaria is extant and Errantia is extinct

a. Sedentaria are sedentary or slow-moving, while most Errantia are free-living predators

While dissecting the earthworm, you cut the intestine open and notice a black substance. What is the black substance inside of the intestine? a. Soil and Detritus b. Eggs and Sperm c. Pure Nitrogen d. Brownie Batter

a. Soil and Detritus

This organism belongs to which phylum? a. Syndermata b. Platyhelminthes c. Brachiopoda d. Annelida

a. Syndermata

These specialized cells, called _____________________, allow the squid to change colors. a. Mantles b. Chromatophores c. Gonads d. Crayolaphores

b. Chromatophores

What is structure E and what is its purpose? a. Pharynx; to help the worm suck in soil and detritus b. Crop; stores food before it is digested c. Gizzard; muscular digestion which grinds food d. Intestine; chemical digestion

b. Crop; stores food before it is digested

Is this Earthworm male or female? a. Male b. Female c. Both, Earthworms are hermaphrodites d. Neither, Earthworms do not reproduce sexually

c. Both, Earthworms are hermaphrodites

These organisms belong to which class? a. Polyplacophora b. Gastropoda c. Cephalopoda d. Anthozoa

c. Cephalopoda

What is the structure labeled C? a. Cocoon b. Crop c. Clitellum d. Corona

c. Clitellum

What is the structure labeled A in the photo of the clam? Hint: The clam uses this structure to help it burrow in the sand and for side to side movement. a. Mantle b. Siphon c. Foot d. Gills

c. Foot

What is structure B and what is its purpose? a. Pharynx; to help the worm suck in soil and detritus b. Crop; stores food before it is digested c. Gizzard; muscular digestion which grinds food d. Intestine; chemical digestion

c. Gizzard; muscular digestion which grinds food

Tapeworms, within the clade Cestoda, have four main body regions. Which one is shown below? (Third one down) a. Scolex b. Immature Proglottid c. Mature Proglottid d. Gravid Proglottid

c. Mature Proglottid

What is structure A and what is its purpose? a. Pharynx; to help the worm suck in soil and detritus b. Crop; stores food before it is digested c. Gizzard; muscular digestion which grinds food d. Intestine; chemical digestion

d. Intestine; chemical digestion

What is this structure in the squid? Hint: The squid uses this structure to help push water over the gills, propel itself through the water, expel waste products and push ink out of the body. a. Heart b. Chromatophore c. Mantle d. Siphon

d. Siphon

Which of the following is not true about squid arms and tentacles? a. Tentacles only have suckers at the end furthest away from the body while arms have suckers along their entire length. b. Tentacles are much longer than arms. d. Squid have eight arms and two tentacles d. Squid have eight tentacles and two arms

d. Squid have eight tentacles and two arms

Which of the following is not a defining characteristic of mollusks? a. Muscular Foot b. Visceral Mass c. Mantle d. Tentacles

d. Tentacles