Polysiphonia tetraspores

Draparnaldia

Oedogonium Nanandrous [Pertaining to species of plants in which male members are markedly smaller than females, such as in some algal species of Oedogonium that have antheridia produced in special dwarf filaments]

Oedogonium Zoospores

Spirogyra scalaiform conjugation [Scalariform conjugation requires association of two different filaments lined side by side either partially or throughout their length. One cell each from opposite lined filaments emits tubular protuberances known as conjugation tubes, which elongate and fuse, to make a passage called the conjugation canal. The cytoplasm of the cell acting as the male travels through this tube and fuses with the female cytoplasm, and the gametes fuse to form a zygospore.]

Spirogyra Terminal Conjugation

 Micrasterias

Chara [multicellular and superficially resemble land plants because of stem-like and leaf-like structures]

Bryopsis Gametes 

C. Male

D. Female