INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
17th Edition
ISBN: 9781260704310
Author: HICKMAN
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Textbook Question
Chapter 7, Problem 5RQ
Define the terms dioecious and monoecious. Can either of these terms be used to describe a hermaphrodite?
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Contrast the biological advantages of hermaphroditism that involves cross-fertilization with hermaphroditism that involves self-fertilization.
Define the two alternatives of bisexual reproduction-parthenogenesis and hermaphroditism, and give a specific example from the animal kingdom for each. Also differentiate meiotic and ameiotic parthenogenesis.
Describe various types of asexual reproduction. Compare external and internal fertilization.
Chapter 7 Solutions
INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
Ch. 7 - Define asexual reproduction, and describe four...Ch. 7 - Prob. 2RQCh. 7 - Explain why genetic mutations in asexual organisms...Ch. 7 - Define two alternatives to bisexual...Ch. 7 - Define the terms dioecious and monoecious. Can...Ch. 7 - Prob. 6RQCh. 7 - What is a germ-cell line? How do germ cells pass...Ch. 7 - Explain how a spermatogonium, containing a diploid...Ch. 7 - Prob. 9RQCh. 7 - Name the general location and give the function of...
Ch. 7 - Prob. 11RQCh. 7 - What are the male sex hormones and what are their...Ch. 7 - Explain how the female hormones GnRH, FSH, LH, and...Ch. 7 - Explain the function of the corpus luteum in the...Ch. 7 - Describe the role of pregnancy hormones during...Ch. 7 - If identical human twins develop from separate...Ch. 7 - Fish and amphibians tend to have less complex...
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- Describe what sexual dimorphism is and why its existence is puzzling.arrow_forwardWhat is Asexual reproduction? Explain kindlyarrow_forwardWhat are the general characteristics of sexual reproduction in humans and other vertebrates that are associated with continuous production of many sperm cells but intermittent, finite production of egg cells?arrow_forward
- List three ways in which oopenesis differs from spermatogeneis. Be specific.arrow_forwardWhich of the following scenarios is an example of sequential hermaphroditism? Hamlet fish typically contain both male and female sexual organs and can mate as both male or female on the same day When male striped maple trees are sick or damaged, their sex will change to female When turtle eggs incubate at high temperature, the hatchlings will be female. When they incubate at low temperatures, the hatchlings will be male Vipers typically sexually reproduce, but can asexually reproduce when kept in captivityarrow_forwardCompared to separate sexes and assuming self-fertilizing is not possible, what might be one advantage and one disadvantage to hermaphroditism?arrow_forward
- Differentiate histologically the female reproductive organs of the various species: ORGAN Bitch Mare Cow Sow Ovary Uterine tube Cervix Vagina Uterusarrow_forwardAlthough the most effective form of an oral contraceptive for woman contain estrogen and progestin, some birth control pills contain a small dose of progestin-only. This is because there are many risks and side effects. Which of the following statements is NOT a reason for using a progestin-only oral contraceptive? Select one: A. progesterone maintains the corpus luteum as corpus luteum release a large amount of progesterone and estrogen. B. progesterone suppresses the maturation of follicles, thereby preventing ovulation of a mature ovum. C. progestin-only oral contraceptives prevent the production of FSH and LH in the anterior pituitary. D. progesterone suppresses the production of GnRH in the hypothalamus.arrow_forwardFertilization is the fusion of haploid gametes, ovum and spermatozoon, to form a diploid zygote. Discuss physiologic mechanisms in the male and the female that make sure that indeed only one sperm fertilizes a single eggarrow_forward
- What are the benefits to sexual reproduction? In humans, which gamete is responsible for sex determination of the offspring? List all the structures of the male reproductive system.arrow_forwardListed in the table below are the five major reproductive hormones that support ovulation in female mammals, including the giant panda. Describe the role of each hormone in this process and the approximate time during the ovarian cycle that it reaches peak levels. Hormone Gonadotropin-releasing hormone (GnRH) Estrogen Luteinizing hormone (LH) Follicle stimulating hormone (FSH) Progesterone Role in Regulation of the Menstrual Cycle Timing of Peak Levelarrow_forwardFigure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forward
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