Astudent encounters a pondweed that appears to be a charophyte. which of the following features would the student determine whether the sample comes from a charophyte or from some other type of green alga?
a) molecular structure of enzymes inside the chloroplasts and presence of phragmoplasts
b) molecular structure of enzymes inside the chloroplasts and rings of cellulose-synthesizing complexes
c) structure of sperm cells and presence of phragmoplasts
d) structure of sperm cells, presence of phragmoplasts, and rings of cellulose-synthesizing complexes

Option D, structure of sperm cells, presence of phragmoplasts, and rings of cellulose-synthesizing complexes

Explanation:

The cells of Charophyte contain several chloroplast and nuclei and thus they are known as coenocytic.

The structure of their sperm is very similar to that of the plants on land which make it distinctive from other fresh water algae. The sperm has flagella that makes it motile.

Only one of the Charophyta species uses the phragmoplast method of cell division just like plants

Like land plants, charophytes' plasma membrane has distinctive rings of cellulose-synthesizing complexes which synthesizes cellulose microfibrils

Hence, option D is correct

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

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.