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 generationsb) sporopolleninc) rosette cellulose-synthesizing complexesd) flagellated sperme) embryos

The answwer is letter E.

Explanation:

Embryos.  Because land plants evolved from aquatic green algae. The transition was easy because of the amount of traits  that allowed the survival of the specie. One of these traits was the embryo, which is so essential that every land plants are known as embryophytes.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.