Campbell Biology & New Mastering eText Value Pack Access Code
1st Edition
ISBN: 9780321989574
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 8TYU
EVOLUTION CONNECTION Many species can reproduce either asexually or sexually. Explain what you think might be the evolutionary significance of the switch from asexual to sexual reproduction that occurs in some organisms when the environment becomes unfavorable.
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Many species can reproduce either asexually or sexually. Explain what you think might be the evolutionary significance of the switch from asexual to sexual reproduction that occurs in some organisms when the environment becomes unfavorable.
Sexual reproduction creates diversity in a species. List TWO ways in which diversity is introduced during sexual reproduction in humans and for each explain how diversity is introduced.
meiosis is a type of cell division only required in organisms that reproduce sexually. Explain why meiosis is needed (instead of mitosis) for sexual reproduction, and describe one possible advantage of reproducing sexually instead of just copying cells.
Chapter 13 Solutions
Campbell Biology & New Mastering eText Value Pack Access Code
Ch. 13.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 13.1 - How does an asexually reproducing eukaryotic...Ch. 13.1 - WHATIF? A horticulturalist breeds orchids, trying...Ch. 13.2 - MAKE CONNECTIONS In Figure 13.4. how many DNA...Ch. 13.2 - VISUAL SKILLS In The karyotype shown in Figuro...Ch. 13.2 - WHAT IF? A certain eukaryote lives as a...Ch. 13.3 - MAKE CONNECTIONS Comparc tho chromosomes in a...Ch. 13.3 - WHAT IF? After the synaptonemal complex...Ch. 13.4 - What is the original source of Variation among the...Ch. 13.4 - The diploid number for fruit flies is 8, and the...
Ch. 13.4 - Prob. 3CCCh. 13 - Explain why human offifuing resemble their parents...Ch. 13 - Compare the life cycles of animals and plants,...Ch. 13 - Prob. 13.3CRCh. 13 - Prob. 13.4CRCh. 13 - A human cell containing 22 autosomes.and a Y...Ch. 13 - The two homologs of a pair move toward opposite...Ch. 13 - Meiosis II is similar to mitosis in that (A)...Ch. 13 - Prob. 4TYUCh. 13 - If we continue to follow the cell lineage from...Ch. 13 - DRAW IT The diagram shows a cell in meiosis. (a)...Ch. 13 - Explain how you can tell that the cell in question...Ch. 13 - EVOLUTION CONNECTION Many species can reproduce...Ch. 13 - SCIENTIFIC INQUIRY The diagram in quest ion 6...Ch. 13 - Prob. 10TYUCh. 13 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- Genetics knowledge 9. A certain species of desert rat is a sexually-reproducing, diploid animal. It has a genome (N) consisting of 22 different types of chromosomes. Stages of gametogenesis in these mammals are similar to humans. Answer the following question in the imagearrow_forwardWhat is a likely evolutionary advantage of sexual reproduction over asexual reproduction? a. sexual reproduction involves fewer steps b. less chance of using up the resources in a given environment c. sexual reproduction results in greater variation in the offspring d. sexual reproduction is more cost-effectivearrow_forwardMultiple choice:which of the following are disadvantages of sexual reproduction? Requires more timeRequires more energy to be expended during courtship Favorable gene combo are broken up Allows for the removal of bad genetic combinationsarrow_forward
- Some organisms—for example, certain fungi—reproduce asexually when the environment is favorable and sexually when the environment becomesunfavorable. What might be the evolutionary advantage of sexual reproduction with the associated process of meiosis during unfavorable conditions?arrow_forward. SCIENTIFIC INQUIRY You discover a new egg-laying wormspecies. You dissect four adults and find both oocytesand sperm in each. Cells outside the gonad contain fivechromosome pairs. Lacking genetic variants, explain howyou would determine whether the worms can self-fertilize.arrow_forwardAsexual reproduction has all of the following advantages over sexual reproduction EXCEPT Question 1 options: No "cost of males" Can found a new population from a single individual There are no advantages to asexual reproduction Produces more offspring per reproductive event In unchanging environments, offspring are exactly as adapted as their parents to their habitatarrow_forward
- A: Why do sea urchins have external fertilization? [Discuss the life style of the developing sea urchin embryo in the water column compared to a very different ecological niche of the adults on the ocean floor. Besides, would you want to give live birth to a sea urchin! ouch!] 2: Then why don't the parents take care of the young? [In fact the adults do in a way. After the embryo has grown large enough and metamorphosed into a young urchin they hide in the spines of the adults, living off of the scraps of food produced from the messy eating of the adults] 3: Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?arrow_forwardWhich of the following statements CORRECTLY describes the contribution of sperm to thezygote for most vertebrate species?A. flagella, acrosome vesicle,B. mitochondria, haploid DNAC. centriole, haploid DNAD. acrosome vesicle, mitochondriaarrow_forwardCompare and contrast asexual versus reproductions in organisms, Define eahc of these terms and provide three costs and benefits for seuxual reproductions. Name two organisms that aseuxually and sexually reproduce .arrow_forward
- Some organisms are capable of asexual or sexual reproduction. Under favorable conditions, reproduction proceeds asexually. When conditions become more stressful reproduction switches to a sexual mode. Why? Question options: Sexual reproduction is simple and more rapid allowing larger numbers of offspring to be produced. Sexual reproduction requires two separate individuals, who can mutually provide nutrient support during stress. Sexual reproduction produces individuals with new combinations of recombined chromosomes increasing diversity. Asexual reproduction requires more energy.arrow_forwardUnicellular organisms such as bacteria depend on asexual reproduction. Why is sexual reproduction so common in multicellular organisms? 1 - because it produce more offspring 2 - because it creates genetic variation in the population 3 - because a sexual population can grow faster than an. Asexual population 4 - because it produces offspring that are identical to the parents 5 - because it requires less energyarrow_forwardand humans, the ___ determines the sex of the offspring because ___ A. male... The mail can contribute either X or Y B. female… Only the female provides cytoplasm to the zygote C. Male… The sperm can fertilize either a female or a male egg D. Female… Only the female has two functional sex chromosomearrow_forward
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