The ____ represent an internal respiratory system
a. skin folds on an amphibian
b. broad, flat body of a flatworm
c. branched gill filaments
d. folds within human lungs
e. gills on a salamander
ANSWER: d
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The filamentous bacteria that grow on the dorsal surface of certain polychaete worms
A. fend off potential predators with toxins. B. may provide the worm with protection from toxic metals. C. carry out photosythesis. D. All of the choices are correct.
What would be the predicted outcome for a person having eyes that lack a lens but are otherwise fully
functional?
a. They would be totally blind. b. They would be able to perceive light and even respond to different light intensities, but that is all. c. They would be able to perceive light and even colors (solid color over a large area), but not details. d. They would be able to see some details and read print, but only if the text were written in large, black letters. e. They would have normal vision if given glasses.
A stratified epithelium is often composed of multiple layers of cuboidal or squamous epithelial cells, and usually located in body regions to provide protection
Indicate whether the statement is true or false
Evolutionarily, the jaws of vertebrates developed from
A. the operculum. B. the last pharyngeal arch of jawless fishes. C. the circular mouth of lampreys. D. the third pharyngeal arch of jawless fishes. E. the claspers.