Which life cycle describes a plant that reproduces asexually and sexually? a. egg + sperm → embryo → adult with all its chromosomes → gametes → adult; gametes produce an organism with half the chromosomes b. egg + sperm → zygote → adult with all its chromosomes → spores → adult; spores produce an adult with half its chromosomes c. egg + sperm → embryo → adult with all its chromosomes → gametes → adult; gametes produce an organism with all its chromosomes d. egg + sperm → zygote → adult with all its chromosomes → spores → adult; spores produce an adult with all its chromosomes