Campbell Biology: Custom Edition
18th Edition
ISBN: 9781323717271
Author: Urry, Cain, Wasserman, Minorsky, Reece
Publisher: PEARSON C
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Chapter 23.1, Problem 3CC
MAKE CONNECTIONS Ø If a population stopped reproducing sexually (but still reproduced asexually), how would Its
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Review the discussion of evolution and Investigating Life 1.1. Which of the following statements is/are most likely
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Moths that could smell the nectar at the bottom of the orchid saw the need for a longer tongue,
so they grew
one that reached the nectar and passed on the longer tongue to their offspring.
Moths that could smell the nectar at the bottom of the orchid mated with females that had
longer tongues so
that their offspring might have a chance to reach the nectar
At least one moth species has always been able to reach the nectar of the orchid.
Moths with longer tongues are more likely to have access to the orchid nectar and are
therefore more likely
to survive to reproduction.
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F4
Orchids with deeper nectaries are more likely to have moths rub against their pollen, and are
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Chapter 23 Solutions
Campbell Biology: Custom Edition
Ch. 23.1 - Explain why genetic Variation within a population...Ch. 23.1 - Ot all the mutations that occur in a population,...Ch. 23.1 - MAKE CONNECTIONS If a population stopped...Ch. 23.2 - A population has 700 individuals, 85 of genotype...Ch. 23.2 - The frequency of allele a is 0.45 for a population...Ch. 23.2 - WHAT IF? A locus that affects susceptibility to a...Ch. 23.3 - In what sense is natural selection more...Ch. 23.3 - Distinguish genetic draft from gene flow in terms...Ch. 23.3 - WH AT IF? Suppose two plant populations exchange...Ch. 23.4 - What is the relative fitness of a sterile mule?...
Ch. 23.4 - Explain why natural selection is the only...Ch. 23.4 - Prob. 3CCCh. 23 - Typically. most of the nucleotide variabillity...Ch. 23 - Is it circular reasoning to calculate p ond q from...Ch. 23 - Would two small, geographically isolated...Ch. 23 - How might secondary sex characteristics in males...Ch. 23 - Natural selection changes allele frequencies...Ch. 23 - Prob. 2TYUCh. 23 - Prob. 3TYUCh. 23 - There are 25 individuals in population 1, all with...Ch. 23 - Prob. 5TYUCh. 23 - EVOLUTION CONNECTION Using at least two examples,...Ch. 23 - SCIENTIFIC INQUIRY INTERPRET THE DATA Researchers...Ch. 23 - Prob. 8TYUCh. 23 - SYNTHESI2E YOUR KNOWLEDGE This kettle lake forracd...
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- Evolution in Humans 1) explain what evolutionary mechanisms are involved in creating variation in populations 2) define homology and analogy and discuss examples of eacharrow_forward180- 170- Figure 1. For each of more than 200 human societies, the average height of the men is plotted against the average height of the women. The diagonal line shows where the points would fall if men and women were of equal height. From Rogers and Mukherjee (1992). 160- 150- 140- 140 150 160 170 180 Female stature (cm) tionry ysin.e 2. Using an evolutionary approach, explain the evolution of sexual dimorphism in height among men and women, Is this difference due to natural or sexual selection? How do know? you Male stature (cm)arrow_forwardSelect two items that biologists agree are necessary in order to consider an organism “alive.” For each, give an example of a nonliving object that otherwise fits the definition of “alive.”arrow_forward
- Match each of the following properties of life with the correct descrip Movement toward or away from something Passing DNA onto offspring 100 Organisms develop according to instructions in their genetics. Mutations in genes over time can lead to greater success in an environment. Capturing energy from the sun, or eating food. 1. Reproduction 2. Response to Stimuli 3. Growth and Development 4. Energy Processing 5. Evolutionarrow_forwardIf evolution requires genetic variation, can populations of asexually reproducing organisms evolve? Explain.arrow_forwardEVOLUTION CONNECTION Explain the biological basis forassigning all human populations to a single species. Can youthink of a scenario by which a second human species couldoriginate in the future?arrow_forward
- which of thee following statement is false 1) the antagonistic pleiotropy hypothesis is used to explain why evolving to live longer is often beneficial to oneâ s fitness 2)Ribozyme is class of molecule that is made of RNAs (thus "ribo" in its name) and amino acids (thus "zyme" in its name). 3)In human population, males are in general larger than females. This observation can be seen as an example of sexual dimorphism.arrow_forwardIn which of the following scenarios would evolution by natural selection take place? A banana tree branch is planted, producing a clone of the parent tree Microorganisms reproduce asexually, producing identical offspring Corn is genetically modified and cloned to make identical crops Penguins reproduce sexually, producing offspring that look different from one anotherarrow_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_forward
- genetics question on fixationarrow_forwardBiology 1-Please explain the concept of coalescence (no more than three sentences) 2- Why do we say that genetic drift is not adaptive? (Answer in no more than 3 sentences).arrow_forwardPart A If the moth population in your simulation of natural selection contained 10 black moths (BB), 18 grey moths (Bb), & 17 white moths (bb), how many total copies of the black allele (B) would this population of 45 moths be carrying? (Remember moths are diploid, so each moth carries two alleles for each gene.) 38 20 28 19 36arrow_forward
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