Suppose that an unknown organism from an alien planet is observed and found to have a diploid state only following fertilization. Meiosis follows and the majority of this organism's life is spent in a haploid state. Which multicellular organisms on Earth most closely resemble this type of life cycle strategy?

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Some algae exhibit a life cycle where the diploid state is only present following fertilization, and meiosis occurs soon after, leading to a predominantly haploid life cycle. This is known as a haplontic life cycle, which is different from the life cycles of ferns, maple trees, and humpback whales, which either have a diplontic life cycle (predominantly diploid) or an alternation of generations with significant diploid and haploid phases.

Suppose That an Unknown Organism from an Alien Planet Is