On a Field Trip,a Student in a Marine Biology Class

Multiple Choice

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) sporopollenin
B) rings of cellulose-synthesizing complexes
C) flagellated sperm
D) embryos