Question

How many meiotic divisions would be required to produce 101 female gametophytes in an angiosperm?
A.101
B.26
C.127
D.None of the above

Answer 1

Hint: Angiosperm, any flowering plant, is the biggest and perhaps most versatile group inside the kingdom Plantae. Angiosperms are responsible for roughly 80 percent of all identified plant species present in existence. Angiosperms are vascular seedlings wherein the ovule (egg) is fertilized and emerges into a seed in a closed void ovary.

Complete answer:The reproductive structures of angiosperms are established by sophisticated or sometimes showy organs named flowers. The negation of angiosperm is called a seed in a box or case that originates from the Greek words angio meaning box, or vessel and sperm meant seed. The ovule comprises a megasporangium, is enclosed by one or two inner linings, and gradually grows into a seed. Within the ovule, the megaspore of the parent cell (mother) splits by meiosis into four haploid nuclei (megaspores); three of these disintegrate, retaining one functional megaspore that distinguishes the embryonic sac by mitosis. The embryo sac is a female gametophyte and includes four to eight nuclei, one being the egg nucleus, and two or three are the endosperm nucleus. Thus, one meiotic division produces one matured female gametophyte in an angiosperm. Hence, 101 meiotic divisions are required to produce 101 female gametophytes in an angiosperm. The life cycle of flowering plants reveals a predominant sporophyte and reduces gametophytes. The intricacy of the development cycle focuses on the meiosis and fertilization of the flower and the presence of the female gametophyte in the flower.
So, the correct answer is (A).

Additional Information:
Early angiosperm remains help elucidate phenotypic differentiation in the archaeological history at particular times. Early fossils are composed of leaves, roots, pollen, and rarely flowers. Generally, these parts are created as isolated pieces. Fossils were often identifiable by the family as well as by the genus. Fossil evidence could only be used periodically, along with it all gathered from the developmental studies of living creatures, to identify ancestral and inherited traits of specific characters. One of the finest examples is pollen.

Note:Angiosperms are believed to be monophyletic or originating from a single ancestral because they have reproductive organs, triploid endosperms, and ovules enclosed by two outer protective layers, one being the egg nucleus and two or even more of which is the endosperm nuclei.