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meiosis within the male gametophyte to produce sperm.
meiosis within the female gametophyte to produce eggs.
meiosis within the ovary to produce megaspores.
fertilization leading to development of microspores.
fertilization leading to development of megaspores.
Introduction:
The vascular seed plants that have an ovule, which on fertilization forms a seed, are angiosperms. The seed formed is enclosed within the ovary (hollow), which itself is enclosed within the flower. These are also called flowering plants and are known to have most diversity within the Plantae kingdom.
Answer to Problem 1TYK
Correct answer:
The process of meiosis takes place within the ovary to form megaspores in sexual reproduction in an angiosperm life cycle.
Explanation of Solution
Justification/ Explanation for the correct answer:
Option (c) is given as meiosis within ovary to produce megaspore. The production of haploid megaspores takes place within the ovary. The spores that are formed within the ovary help in the development of female gametophyte. These female gametophytes then undergo mitosis to form gametes that fertilize with the male gamete to form an embryo. Hence, option (c) is correct.
Explanation for the incorrect answers:
Option (a) is given as: meiosis within the male gametophyte to produce sperm. The meiosis taking place within the male gametophyte results in the development of spores, microspores. These spores then divide by mitosis to form male gametes. So, it is incorrect.
Option (b) is given as: meiosis within the female gametophyte to produce eggs. When meiosis takes place within the ovary, haploid megaspores are formed. These megaspores then form the female gametophyte by mitosis, which then produces gametes (egg). So, it is incorrect.
Option (d) is given as: fertilization leading to the development of microspores. The microspores are male spores that are formed when male gametophyte undergo meiosis. The fertilization of male and female gametes results in the formation of an embryo. So, it is incorrect.
Option (e) is given as: fertilization leading to the development of megaspores. The megaspores are formed when the female gametophyte undergoes meiosis. These megaspores form the gametes that fertilize with male gametes to form an embryo. So, it is incorrect.
Hence, options (a), (b), (d), and (e) are incorrect.
Therefore, it can be concluded that the female gametophyte present within the ovary undergoes meiosis to form megaspores. These megaspores divide by mitosis and form female gametes. Similarly, microspores are produced by the male gametophyte by meiosis, which divides by mitosis and forms male gametes. These two gametes fertilize to form the seed or the embryo.
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Chapter 36 Solutions
Biology: The Dynamic Science (MindTap Course List)
- Which statement below is correct regarding the formation of the endosperm in angiosperms? O the endosperm is formed from the female gametophyte and is haploid O a single sperm nucleus fertilizes the egg nucleus to become the diploid zygote O a sperm nucleus forms both the zygote and the endosperm through double fertilization O a second sperm nucleus fuses with the two polar nuclei of the egg sac МacВook Pro G Search or type URL @ 2# $ & * 2 3 4 6 8 W E R Yarrow_forwardThe life cycle of the flowering plants and the gymnosperms is different in many ways. One way that they are similar however is; They both engage in double fertilization The seed coats for gymnosperms and angiosperms comes from the parent plant and is diploid Both the flowering plants and gymnosperms reproduce by using strobili Both the angiosperms and the gymnosperms are homosporous and produce one type of gametophytearrow_forwardIn the mature angiosperm seed, the nutritive tissue is triploid. This tissue is formed from; Two polar nucleii fusing with a sperm cell The synergids fusing with a sperm cell The sperm fusing with the egg cell The embryoarrow_forward
- The best answer describing angiosperm fertilization is: O a single sperm fertilizes an egg a single sperm fertilizes the antipodal cells O a single sperm fuses with the two polar nuclei one sperm fertilizes the egg, one fuses with the two polar nuclei to create 3N tissue one sperm fertilizes the egg, one fuses with the antipodal cells to create 3N tissuearrow_forwardMost of the approximately 900 species of gymnosperms are conebearing plants. On the surfaces of their cone scales are ovules, which later become seeds. These ovules are said to be naked because they are not completely enclosed by diploid tissue (as the ovules of angiosperms are). This characteristic gives the gymnosperms their name; gymnos is a Greek word meaning naked, and sperma means seed. Botanists now divide the gymnosperms into four groups: conifers, cycads, ginkgos, and gnetophytes.arrow_forwardIn a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? ovary → style → stigma stigma → style → ovary ovary→ stigma→ style stigma→ ovary → stylearrow_forward
- Which of the following is NOT a characteristic of the gametophyte stage of the flowering plant? -The gametophyte is diploid -Male and female gametophytes are separate from one another -The gametophyte is haploid -The gametophyte is dependent on the sporophyte for a specific amount of time -The gametophyte is a gamete producing structurearrow_forwardGymnosperms are heterosporous plants. This means that; They reproduce by using one type of spore Their spores are covered with sporopollenin They produce separate male and female sporesarrow_forwardThere are two locations in which the gynoecium interacts chemically with the pollen and pollen tube and can either allow the pollen tube to grow or prevent it from growing. What are these two locations? O Style and megagametophyte Stigma and ovule Stigma and style Stigma and megagametophyte Style and ovulearrow_forward
- Describe the structure of a seed. Include the following: Seed coat, endosperm and embryo.arrow_forwardLilium Ovary Describe the function of each structure (Central column, ovule, funiculus, septum, pericarp, and locule) Compare the lily ovary to the pistillate strobilus of a gymnospermarrow_forwardWhich of the follow correctly describe the function of a cone? Question 32 options: Carries the microgametophyte and sperm cells during sexual reproduction in angiosperms. Contains the plant embryo and a tissue such as endosperm to provide nutrition for early plant growth. The reproductive structure of the gymnosperms. Grows from the ovary of a flowering plants and surrounds the seed. Provides protection and/or attracts animals to aid in seed dispersal. The reproductive structure of the angiosperms.arrow_forward
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