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) alternation of generations
B) sporopollenin
C) rosette cellulose-synthesizing complexes
D) flagellated sperm
E) embryos

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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