6) A stalked, sessile marine organism has several elongatedfeeding structures surrounding an opening where food is ingested.This organism could potentially be a cnidarian, a tube-dwellingworm, a crustacean or an echinoderm, Finding which of the followingin this organism would allow you to be certain of the organism’sidentity?

A) radial symmetry

b) the presence of jointed limbs

c) a hard shell composed of calcium carbonate

D) a nervous system

7) a rhinocerous is chasing a shrew in full sunlight, and bothoverheat by the same amount above their normal body temperatures.When night falls and they rest, which animal will cool downfaster?

A) the shrew will because it has the higher surface area/volumeratio

B) the rhinoceros will because it has the higher surfacearea/volume ratio

C) the rhinoceros will because it has the lower surfacearea/volume ratio

D) they will cool at the same rate because they overheated bythe same amount.

8) A teacher wants to demonstrate that some invertebratespossess an open circulatory system. The teacher should dissecta

A) porifera

b) gastropod

C) polychaete

d) hagfish

9) bivalves in an aquarium with se stars, lobsters, andgastropods, started to die one by one; only the undamaged sheelsremined. If the teacher used a disseting microscope to examine theintact external surfaces of the empty shells of the bivalves, theteacher would probably see marks left by

A) jaws

B) nematocysts

C) tube feet

D) radulae

10) Julie catches a ray-finned fish from the ocean and noticethat attached to its flank is an equally long. Snakelike organism.The attached organism that has no external segmentation, no scales,a round mouth without a jaw, and two small eyes. Julie thinks itmight be a marine polychaeta, a hagfish, or a lamprey. What featureexcludes it from potentially being a polychaeta?

a) its lack of scales

B) its elongate shape

C) its closed circulatory system

d) its lack of external parapodia

11) if the snakelike organism turned out to be a hagfish, whyshould Email throw the ray-finned fish the caught overboard ratherthan making dinner from it?

A) it has mucous on its skin

B) the fish was probably sick or dying, otherwise the hagfishwould not have attacked it

c) hagfish inject paralytic neurotoxins.

d) if it had an ectoparasite in must also haveendoparasites.

12) you obseve a female burrowing mammal it has two tiny eyesthat are difficult to see and seemingly covered by skin as well asenlarged front paws with enlarged claws for digging, what might youlook for to distinguish whether it was a marsupial or eutherianmole?

A) a synapsid skull

B) a cleithrum

C) an external abdominal pouch

d) a dentary-squamosal type jaw point