Which portion of the plant life cycle is haploid?

• A. Sporophyte
• B. Gametophyte
• C. Zygote
• D. Embryo

Answer: (B)

Verified step by step guidance

1. Understand the plant life cycle, which alternates between two phases: the diploid sporophyte and the haploid gametophyte.
2. Recognize that the sporophyte phase is diploid, meaning it has two sets of chromosomes.
3. Identify that the gametophyte phase is haploid, meaning it has one set of chromosomes.
4. Recall that the zygote is formed by the fusion of two gametes and is therefore diploid.
5. Understand that the embryo develops from the zygote and is also diploid, confirming that the gametophyte is the haploid phase.