Most flowers contain both male and female reproductive structures, in contrast to the cones of gymnosperms, which are either male or female. Explain how bisexual flowers might be an advantageous evolutionaryadaptation to the flowering plants that possess them.

Most flowers contain both male and female reproductive structures, in contrast to the cones of gymnosperms, which are either male or female. Explain how bisexual flowers might be an advantageous evolutionaryadaptation to the flowering plants that possess them.

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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Most flowers contain both male and female reproductive structures, in contrast to the cones of gymnosperms, which are either male or female. Explain how bisexual flowers might be an advantageous evolutionary
adaptation to the flowering plants that possess them.

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In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microspores
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.
In an angiosperm life cycle, sexual reproduction includes: 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.
Figure 14.26 If a flower lacked a megasporangium, what type of gamete would it not be able to form? If it lacked a microsporangium, what type of gamete would not form?
Considering the trends in floral evolution, how do you think these changes contribute in ensuring successful sexual reproduction among angiosperms? Cite at least two (2) examples of plants exhibiting advanced floral features to support your answer.
Where on the tree you would expect to find male cones, and which structures are haploid and which are diploid. Compare and contrast the staminate cone of Pinus to the sorus of ferns
Both gymnosperm and angiosperm bear seed ,then why are they classified seperatedly?
Explain why angiosperms have fruits, whereas gymnosperms do not.
Answer the following question: What is meant by “double fertilization”? What features of seeds and fruits have enabled angiosperms to become so widespread?
Why is ovule naked in gymnosperm?
In flowers,the structure that produce male and female gametophytes are called______and____
How does double fertilization occur in flowering plants?a. The two sperm in a pollen tube fertilize the two egg cells present ineach female gametophyte.b. One of the two sperm in a pollen tube fertilizes the single egg in afemale gametophyte, and the other fuses with the two nuclei presentin the central cell.c. Two sperm, one contributed by each of two different pollen tubes,fertilize the two egg cells in a single female gametophyte.d. Two sperm contributed by separate pollen tubes enter a singlefemale gametophyte; one of the sperm fertilizes the egg cell, and theother fertilizes the central cell.e. None of the above is correct.