Why are gymnosperms nicknamed "naked seeds?" Because they originate from an egg cell only, rather than an egg cell and a sperm cell. Because they are not encased by the mature ovary. Because they originate from a sperm cell only, rather than an egg cell and a sperm cell. Because they are encased by a protective sheath.

Why are gymnosperms nicknamed "naked seeds?" Because they originate from an egg cell only, rather than an egg cell and a sperm cell. Because they are not encased by the mature ovary. Because they originate from a sperm cell only, rather than an egg cell and a sperm cell. Because they are encased by a protective sheath.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter36: Reproduction And Development In Flowering Plants

Section: Chapter Questions

Problem 1TYK: In an angiosperm life cycle, sexual reproduction includes: meiosis within the male gametophyte to...

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Which of the following traits characterizes gymnosperms? a. The plants carry exposed seeds on modified leaves. b. Reproductive structures are located in a flower. c. After fertilization, the ovary thickens and forms a fruit. d. The gametophyte is longest phase of the life cycle.
Another distinguishing feature of gymnosperms is that they have resin ducts, which conduct complex chemical compounds such tar, resins and turpentine. What is the function of these three chemicals?
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 Y
Most 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.
Lilium 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 gymnosperm
In 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 embryo
Plants and animals originated in water environments and, much later, plants invaded the land and later still, animals invaded the land. a) With respect to the four groups of plants (Bryophytes, seedless vascular plants, Gymnosperms, and Angiosperms), give the basic method of fertilization. That is, how do the sperm reach the eggs? b) What is the significance of the fertilization methods to the invasion of the land by the Gymnosperms and Angiosperms?
Which of the following is correct regarding female gametophyte development in Angiosperms? The female gametophyte develops in the anther The female gametophyte develops in an ovule within an ovary A female gametophyte develops from all four megaspores produced via meiosis All cells of the female gametophyte are haploid
Corn kernel and Peanut How are they similar and how are they different? How do the embryos (do both have plumules and radicle)? What about endosperm, the number of cotyledons, and the presence of a coleoptile and radicles. What is the relationship between the seed coat and pericarp? What is meant by germ and bran, as they relate to the corn seed and grains in general. Why is wheat germ considered to be so healthy and why do we try to get bran into our diets?
Draw a diagram of L.S. of an anatropous ovule of an Angiosperm & label the following parts :- (i) Nucellus (ii) Integument (iii) Antipodal cells (iv) Secondary Nucleus.
Gymnosperms 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 spores
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 tissue