Why is the plant life cycle called alternation of generations? (Select the best answer)

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Question restatement: Why is the plant life cycle called alternation of generations? (Select the best answer)

Available answer options: The provided data includes one answer text: 'Because plants alternate between a multicellular sporophyte and a multicellular gametophyte.' Note that no other answer choices are supplied for analysis.

Analysis of the given option:
- Option: 'Because plants alternate between a multicellular sporophyte and a multicellular gametophyte.' This statement aligns with the standard definition of alternation of generations in plants. In this lifecycle, there are two distinct multicellular generations: the sporophyte, which is diploid and produces spores via meiosis, and the gametophyte, which is haploid and produces gametes via mitosis. The cycle alternates between these two generations, hence the term 'alternation of generations.' The concept explains why some stages are focused on spore production while others are focused on gamete production, and why there is a switch between haploid and diploid forms throughout the lifecycle.

Context and potential alternative reasoning (not present in the provided options but useful for understanding): If there were additional options, they might reference concepts such as genetic variation through meiosis, the roles of sporophyte and gametophyte in different plant groups (e.g., bryophytes vs. tracheophytes), or the dominance of one generation over the other in certain lineages. Misconceptions to watch for would include thinking alternation only involves a single form changing function, or confusing alternation of generations with alternating life stages that are not multicellular or with mere alternation of physiological states within a single generation.

In summary, the core idea captured by the provided statement is that plant life cycles alternate between two multicellular generations—the sporophyte and the gametophyte—each producing the next generation via distinct reproductive processes, which is the essence of alternation of generations.

FRST_V 303 101-107 2025W1 Weekly quiz #6 - Lectures 12-13 - Section 103, 104

Why is the plant life cycle called alternation of generations? (Select the best answer)

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