9. Angiosperms, unlike other groups of plants, can perform double fertilization as part of their life cycle. What does double fertilization mean? Two sperms fertilize a single egg Two eggs are fertilized by a single sperm One sperm fertilizes an egg and another fertilizes one or more polar nuclei Two perfect flowers exchange gametes, effectively fertilizing each other's eggs. 10. Effective population size refers to the number of individuals which can participate in the reproduction proc Which of the following proportions of individuals would bring about the highest effective population size? 20 females and 80 males 70 females and 30 males 45 females and 55 males 35 females and 65 males

9. Angiosperms, unlike other groups of plants, can perform double fertilization as part of their life cycle. What does double fertilization mean? Two sperms fertilize a single egg Two eggs are fertilized by a single sperm One sperm fertilizes an egg and another fertilizes one or more polar nuclei Two perfect flowers exchange gametes, effectively fertilizing each other's eggs. 10. Effective population size refers to the number of individuals which can participate in the reproduction proc Which of the following proportions of individuals would bring about the highest effective population size? 20 females and 80 males 70 females and 30 males 45 females and 55 males 35 females and 65 males

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 3TYK

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Choose the statement that is true. a. All flowers are pollinated by bees. b. Apple trees are propagated by grafting because they are triploid. c. Carpels function to attract pollinators. d. A coleoptile protects the plumule of eudicot seedlings. e. The arrival of pollen on a receptive seed is called pollination. f. In plants, sperm cells are male gametes. g. Nutrients in fruits nourish new seedlings.
Which of the following traits characterizes gym nosperms? The plants carry exposed seeds on modified leaves Reproductive structures are located in a flower After fertilization, the ovary thickens and forms a fruit The gametophyte is the longest phase of the life cycle.
The nutritive tissue in the seeds of flowering plants that is formed from the union of a sperm cell and two polar nuclei is called the (a) plumule (b) endosperm (c) cotyledon (d) hypocotyl (e) radical
The land plants are probably descendants of which of these groups? green algae red algae brown algae d. angiosperms
Which of the following is not an evolutionary trend among plants? a. developing vascular tissues b. becoming seedless c. having a dominant diploid generation d. producing nonmotile gametes e. producing two types of spores
5. Using the illustrations above, arrange the following statements to explain the process of pollen formation in angiosperms. (Microsporogenesis) A. A diploid sporogenous cells differentiate as microsporocytes (pollen mother cells or meiocytes) which divide by meiosis to form four haploid nucleus. B. Distinct single-celled haploid microspores form after cytokinesis.
4. Using the illustrations above, arrange the following statements FROM 1-5 to explain the process of pollen formation in angiosperms. A. The generative cell subsequently detaches from the pollen grain wall and is engulfed by the vegetative cell forming a unique 'cell within a cell' structure. B. Each microspore will form large vacuole displacing the microspore nucleus to an eccentric position against the microspore wall. C. The nucleus undergoes first pollen mitosis which results in the formation of two unequal cells, a large vegetative cell and a small generative cell each containing a haploid nucleus. D. The generative cell divides by mitosis to form two sperm cells completely enclosed within the vegetative cell cytoplasm. E. No cytokinesis takes place forming a pollen grain having 3 haploid nucleus, 1 tube nucleus and 2 sperm cells for double fertilization.
1. What made the angiosperms the most successful terrestrial plants? Discuss your answer.
(D) seeds3. With respect to angiosperms, which of the followingis incorrectly paired with its chromosome count?(A) egg—n(B) megaspore—2n(C) microspore—n(D) zygote—2n
1.The traits flower position, pod shape and stem length are examples of _________
19. all of these plants have tap root system except _____ a. banana b. mango c. radish d. dandelion 20. which of the following describes seed plants l. consists of a tests that protects the embryo ll. identical to spermatophytes lll. comprised of the gymnosperms and angiosperms a. l, ll b. ll, lll c. l, ll, lll d. l, lll
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