Question

Chlamydomonas is microscopic whereas Sargassum is macroscopic; both are
algae. Which characters of these plants
includes them in one group?

Answer 1

Answer:

Now chlamydomonas is grouped under protista kingdom.

Explanation:

but for studying purposes we take chlamydomonas under algae

chlamydomonas-- chlorophyceae(green)

saragassum-------phaeophyceae(brown)

****they both contains chlorophyll pigment as chlorophyll a, b and chlorophyll a, c respectively.

hence they are grouped together in algae.

Answer 2

Explanation:

Chlamydomonas and Saragassum are algae that contains photosynthetic pigment for the process of photosynthesis.

They belong to the same group because of the algae  as they have thalloid plant body which states that the body of algae is not differentiated into roots and stem.

Saragassum is brown algae and chalamydomonas is green algae.