HUM BIOL CONCPTS&CURR
8th Edition
ISBN: 9781323476734
Author: Johnson
Publisher: PEARSON C
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Chapter 21, Problem 3AWK
Summary Introduction
To review:
The fact that many sperms but only one egg are produced in the process of fertilization. Also, explain the possibility of successful reproduction in case the cell number is inverted.
Introduction:
One of the two ovaries releases an egg during ovulation. The egg travels down the oviduct with the help of cilia. The sperms deposited in the vagina near the cervix travel to encounter the egg in the oviduct. It is incredible that sperm and egg find each other despite the journey each must take.
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Chapter 21 Solutions
HUM BIOL CONCPTS&CURR
Ch. 21 - Prob. 1QCCh. 21 - Prob. 2QCCh. 21 -
1. Why does only one sperm fertilize the egg, and...Ch. 21 - Prob. 2CRCh. 21 - Prob. 3CRCh. 21 - Describe the stages of labor and delivery.Ch. 21 - What causes the newborn to take its first breath...Ch. 21 - Prob. 6CRCh. 21 - What causes the onset of puberty (sexual...Ch. 21 - Summarize the three main hypotheses of the causes...
Ch. 21 - Prob. 9CRCh. 21 - Prob. 10CRCh. 21 - Which of the following lists the correct order of...Ch. 21 - Which of the following will result in fraternal...Ch. 21 -
3. Which of the following processes is the first...Ch. 21 - Prob. 4TYCh. 21 - Prob. 5TYCh. 21 - Prob. 6TYCh. 21 -
7. Which of the following is mismatched?
a....Ch. 21 - Prob. 8TYCh. 21 - Prob. 9TYCh. 21 -
10. Which of the following would be detrimental...Ch. 21 - Prob. 11TYCh. 21 - Prob. 12TYCh. 21 - Prob. 13TYCh. 21 - Prob. 14TYCh. 21 - Which hormone plays a critical role both in...Ch. 21 - Prob. 1AWKCh. 21 - Prob. 2AWKCh. 21 - Prob. 3AWKCh. 21 - Each year, it is estimated that over 40,000...Ch. 21 - Prob. 5AWKCh. 21 - Prob. 6AWKCh. 21 - How is it possible that one's life could be...
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- If the liver cells of an animal have 48 chromosomes, the sperm cells would have how many chromosomes? Question 5 options: a) 24 b) Twice the diploid number c) Half the haploid number d) 48arrow_forwardWhy is there a need for mitosis and meiosis? Are there characteristics that make them redundant? Explain. If you created an organism, would you use mitosis or meiosis in reproduction? Why? Provide two examples in nature of organisms that only use one process.arrow_forwardSome organisms reproduce sexually while other organisms reproduce asexually. Which would be an example of asexual reproduction?arrow_forward
- Is the presence of large numbers of chromosomes in an organism a hindrance to sexual reproduction?arrow_forwardMeiosis in animals is responsible for the formation of what type of cells?arrow_forwardWhat kinds of cells would the haploid cells be if meiosis were occurring in a plant? in an animal?arrow_forward
- What would the human life cycle be like if we have an alternation of generations? Assume that the multicellular diploid stage is similar in form to an adult human.arrow_forwardWhat is Reproduction? Explain how humans reproduce their young ones?arrow_forwardWhat are the phases displayed?arrow_forward
- Use an illustration to show the differences between mitosis and meiosis. Explain three processes that give rise to genetic variation. The diagram below shows a pair of homologous chromosomes in a diploid cell. Which of the following is the correct diagram of the gametes that produced the cell if there were no errors in meiosis?arrow_forwardIn some animals, females can reproduce by themselves—that is,without males. In this process, called parthenogenesis, the youngdevelop from unfertilized eggs. Use the Internet to find a species thatuses parthenogenesis. How does parthenogenesis work in thatspecies? What are the differences between meiosis in that species andthe events of “typical” meiosis?arrow_forwardHow is meiosis similar to mitosis? Both involve two divisions of a cell. Both occur in somatic cells. Both produce two daughter cells. Both are forms of cell reproductionarrow_forward
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