Charophytes contain cellulose-based cell walls, store carbohydrates as starch, have chlorophyll a and b, and go through comparable cell-division processes like plants. The reproductive organs of charophytes are distinctive and quite different from those of other algae.
The charophyte algae are the terrestrial plants' closest surviving cousins. They often exhibit zygotic meiosis during their haploid life cycles. However, this conclusion is based on a tiny number of observations and on speculative beliefs about the types of life cycles that may exist.
Plants and all green algae (Chlorophyta) originated from the same evolutionary parent. The photosynthetic pigments chlorophyll a and chlorophyll b are present in both of them. Between 630 million years ago, the two lineages separated.
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