Do algae have embryo retention

Algae do not have embryo retention in the same way that higher plants or animals do. Most algae reproduce through a process called alternation of generations, where they produce motile gametes that fuse to form a zygote, which typically develops into a free-swimming or free-living organism. However, some multicellular green algae, like certain species of Charophytes, show a form of retention where the zygote develops within the parent structure for a short period before dispersing. Overall, embryo retention is not a common characteristic among algae.