Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Textbook Question
Chapter 36, Problem 6TYU
Which of the following statements is true?
- A. All mammals have menstrual cycles.
- B. The endometrial lining is shed in menstrual cycles but reabsorbed in estrous cycles.
- C. Estrous cycles are more frequent than menstrual cycles.
- D. Ovulation occurs before the endometrium thickens in estrous cycles.
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Which of the following is a true statement?(A) All mammals have menstrual cycles.(B) The endometrial lining is shed in menstrual cycles butreabsorbed in estrous cycles.(C) Estrous cycles are more frequent than menstrual cycles.(D) Ovulation occurs before the endometrium thickens inestrous cycles.
In male mammals, excretory and reproductive systems share(A) the vas deferens.(B) the urethra.(C) the seminal vesicle.(D) the prostate.
Female mammals undergo continuous reproductive cycles during their reproductive life. In the sense of offspring production, what is the benefit of these continuous cycles?
Chapter 36 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 36.1 - Prob. 1CCCh. 36.1 - Prob. 2CCCh. 36.1 - MAKE CONNECTIONS What examples of plant...Ch. 36.2 - Prob. 1CCCh. 36.2 - Why might using a hot tub frequently make it...Ch. 36.2 - Prob. 3CCCh. 36.2 - WHAT IF? If each vas deferens in a male was...Ch. 36.3 - Prob. 1CCCh. 36.3 - How does an estrous cycle differ from a menstrual...Ch. 36.3 - Prob. 3CC
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - Prob. 3CCCh. 36 - Prob. 1TYUCh. 36 - The cortical reaction of sea urchin eggs functions...Ch. 36 - Prob. 3TYUCh. 36 - Prob. 4TYUCh. 36 - Prob. 5TYUCh. 36 - Which of the following statements is true? A. All...Ch. 36 - For which is the number the same in males and...Ch. 36 - Prob. 8TYUCh. 36 - Prob. 9TYUCh. 36 - Prob. 10TYUCh. 36 - FOCUS ON EVOLUTION Hermaphroditism is more often...Ch. 36 - Prob. 12TYUCh. 36 - Prob. 13TYU
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- Hermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms?arrow_forwardHermaphroditic animals can self-fertilize, except earthworms. Why? And is this an advantageous or disadvantageous trait to the earthworms? Defend your answer.arrow_forwardGastrulation in a mammal would be most similar to gastrulation in a. a gecko. b. a tuna. c. an eagle. d. no other species; mammalian gastrulation is uniquearrow_forward
- Which of the following organisms would NOT undergo gastrulation? a. fungi and sponges b. worms and snails c. nematodes d. those with only one opening for food and waste (protostomes)arrow_forwardWhich of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardFigure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forward
- Internal and external fertilization differ in that species thata. produce an amniotic egg have internal fertilization.b. without an amniotic egg have external fertilization.c. produce live young have mammary glands.d. lay eggs are external fertilizersarrow_forwardThe testicles of male mammals are suspended in the scrotum because a. the optimum temperature for sperm production is less than the normal core body temperature of the organism. b. the optimum temperature for sperm production is higher than the normal core body temperature of the organism. c. there is not enough room in the pelvic area for the testicles to be housed internally. d. it is easier for the body to expel sperm during ejaculation.arrow_forwardWhich of these functions explains the role of hormones in the reproductive systems? A. Influence female sex traits B. Regulates body temperature. C. Controls the calcium level in the blood. D. Enables the body to produce more antibodies 4. Which of these reproductive parts explains the role of progesterone in the onset of puberty? A. Penis B. Uterine lining C. Oviduct D. Hypothalamusarrow_forward
- what are three difference between mammals and frog testis?arrow_forwardRefer to the diagram below 1. How long is one menstrual cycle? 2. On which day of the menstrual cycle does the period start? 3. On which day of the menstrual cycle is an egg released from the ovary? 4. What happens to the lining of the uterus if an egg is not fertilised? 5. Does a woman have periods while she is pregnant? Explain your answer. 6. How long does a period usually last in the 28-day cycle? 7. If an egg was released from the left ovary on the 2ndMarch, when would the next egg be released from the right ovary? 8. If a woman has a period which begins on the 1st January, when will her next period begin? 9. An egg can survive for up to 3 days after it is released (up to day 17). Sperm can survive up to 8 days inside the woman. Susie want to have a baby. She has a cycle exactly like on the diagram. On which days is she most fertile (most likely to get pregnant)?arrow_forwardDuring morphogenesis, gastrulation does which of the following?A. Gastrulation produces the ectoderm through formation of a blastocyst.B. Gastrulation produces the mesoderm to form the lining of the digestive tract.C. Gastrulation provides the mechanisms whereby cells can form the neural tube.D. Gastrulation produces the endoderm through invagination of the blastula.arrow_forward
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