Multiple Choice
Which of the following statements about the life cycle of plants is true?
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12. Meiosis
Life Cycle of Sexual Reproducers
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Which of the following is included in the alternation of generations in the life cycle of sexual reproducers?
A
Only a multicellular diploid phase
B
Only a multicellular haploid phase
C
Both a multicellular diploid phase and a multicellular haploid phase
D
A unicellular diploid phase and a multicellular haploid phase
Verified step by step guidance1
Understand the concept of alternation of generations: It is a reproductive cycle of certain plants, fungi, and protists, involving a regular alternation between two distinct forms. These forms are typically a multicellular diploid phase (sporophyte) and a multicellular haploid phase (gametophyte).
Identify the multicellular diploid phase: In the alternation of generations, the diploid phase is known as the sporophyte. This phase produces spores through meiosis, which are haploid.
Identify the multicellular haploid phase: The haploid phase is known as the gametophyte. This phase produces gametes (sperm and eggs) through mitosis.
Recognize the alternation: The life cycle alternates between these two phases, with the sporophyte giving rise to the gametophyte and vice versa, ensuring genetic diversity and adaptation.
Conclude that both phases are necessary: In the context of the problem, the correct answer is that both a multicellular diploid phase and a multicellular haploid phase are included in the alternation of generations.
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