1) The Shark's spiral valve (choose all that apply) A) Keeps water out of the nostrils B)...

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Medical Sciences

1) The Shark's spiral valve (choose all that apply)
A) Keeps water out of the nostrils
B) is located in the intestine
C) is located in the stomach
D) Increased surface area for digestion/nutrient absorption
E) Provides buoyancy and increased efficiency of swimming
F) Allows water to flow over the gills
2) The closest extant organism that evolutionarily links fishand amphibians is:
A) salamanders
B) caecilians
C) acanthostega
D) conodonts
E) Lamprey
F) Lungfish
3) Animals that have body temperature dependent on theenvironments (Choose all that apply)
A) are endotherms
B) are homeotherms
C) are ectotherms
D) eat a lot to meet their high energy needs
E) Eat less due to low energy needs
F) Fish & sharks
G) Amphibians & reptiles
H) Birds
4) Fish and amphibians SHARE which of these characteristics:(Choose all that apply)
A) chordates
B) vertebrates
C) endotherms
D) poikilotherms
E) deuterostomes
F) Protostomes
G) Scaley skin
H) Amniotes
5) Which of the following characteristics are shared by ahagfish and a lamphrey? (choose all that apply)
A) a rasping tongue
B) paired fins
C) jaws
D) a notochord
E) Scaled skin
F) Gills
G) operculum

Answer & Explanation Solved by verified expert

3.9 Ratings (518 Votes)

1 Sharks have spiral valve present in there colon of intestinewhich help in the digestion and absorption of food by increasing the surface area of absorptionThus B and D are correct 2Lungfish Protopterus is the connecting link between fishes and amphibians because it has fish like See Answer

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