AP BIOLOGY

Detailed explanation-1: -A sporophyte is a diploid multicellular stage in the life cycle of plant including Pteridophytes which develops from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell therefore has a double set of chromosomes. Hence option A is correct.

Detailed explanation-2: -Reason: Sporophyte is the dominant phase in life cycle of pteridophytes.

Detailed explanation-3: -The sporophyte is a diploid (2n) spore-producing plant. When reproducing, the sporophyte produces specialized leaves called sporophylls.

Detailed explanation-4: -The sporophyte is the main plant body of pteridophyte because it is a diploid multicellular stage that differentiates into true root, stem, and leaves. The sporophyte develops from the zygote which is formed by the fusion of haploid male gamete with the haploid female gamete.

Detailed explanation-5: -The main plant body of pteridophytes is a diploid (2n) sporophyte which is well-differentiated into roots, stems and leaves.