On a field trip, a student in a marine biology class collects an organism that h

Question

On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant? A) flagellated sperm B) sporopollenin C) alternation of generations D) embryos E) rosette cellulose-synthesizing complexes

Explanation / Answer

Algae and land plants have flagellated sperm, rosette cellulose complexes, embryos, and sporopellenin, so it cant be those However land plants do have alternation of generations (C) so that would be the identifying factor for land plants http://www.google.com/url?sa=t&rct=j&q=land%20plants%20vs%20aquatic%20plants%20rosette&source=web&cd=10&cad=rja&ved=0CGEQFjAJ&url=http%3A%2F%2Ffaculty.massasoit.mass.edu%2Fwhanna%2F122_assets%2Fstudy_guide_29-1_land_plant.pdf&ei=nPHQUP7jK6OW0QHrmIBI&usg=AFQjCNF66M0QewVODPIESDh9XlmJnuX3tA

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