Asked by Thalia Nicholle on May 03, 2024
Verified
In angiosperms, meiosis of cells in the ovule gives rise to haploid megaspores. What happens next?
A) Mitosis gives rise to a seed.
B) Mitosis gives rise to a haploid egg and a cell with two nuclei.
C) Mitosis gives rise to a sporophyte.
D) Meiosis gives rise to a diploid egg and a cell with two nuclei.
E) Meiosis gives rise to a more megaspores.
Haploid Megaspores
Single-celled female spores produced by plants, which can develop into a gametophyte generation, part of the plant's reproductive process.
Angiosperms
Flowering plants that produce seeds enclosed within a fruit; they represent the most diverse group of land plants.
Mitosis
A process of cell division in eukaryotic cells where a single cell divides to produce two genetically identical daughter cells.
- Gain insight into the reproductive tactics and life cycles employed by different plant categories.
- Distinguish between the reproductive characteristics of angiosperms and gymnosperms.
Verified Answer
DS
Desirae SomervilleMay 04, 2024
Final Answer :
B
Explanation :
The haploid megaspore undergoes three rounds of mitosis to form an embryo sac. Within the embryo sac, mitosis of the haploid nuclei results in one egg cell and two polar nuclei, which eventually fuse to form the triploid endosperm. Meiosis does not produce a diploid egg cell or more megaspores.
Learning Objectives
- Gain insight into the reproductive tactics and life cycles employed by different plant categories.
- Distinguish between the reproductive characteristics of angiosperms and gymnosperms.