Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 29, Problem 2ITD
Summary Introduction
To review:
The conclusion drawn after observing graphs B and C and the explanation for the survivorship pattern seen in graph C.
The graphs given are:
Introduction:
Adaptation can be defined as the ability of a species to adjust in an environment with the available
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While conducting a plant diversity survey in a temperate rainforest in Washington state, you come across a number of individuals of a low-lying plant species. These plants spread over the surface of moist groun and have numerous small stems that have tiny leaflets. They have root-like structures but do NOT have roots. Back at the lab, tests indicate that the majority of the plant material is haploid. The plant you discovered is likely most closely related to
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Cucumbers and melons are both members of the genus Cucumis, which includes members with distinct geographical origins: the Asiatic group and the African group. The African members of the genus possess disease resistance not found among the Asiatic members of the same genus, and scientists were interested in creating melon-cucumber hybrids that would possess enhanced resistance to mildew and plant viruses. Plant breeders have nicknamed this new fruit, the “melumber”, but its scientific name is Cucumis hytivus.
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Cucumbers and melons are both members of the genus Cucumis, which includes members with distinct geographical origins: the Asiatic group and the African group. The African members of the genus possess disease resistance not found among the Asiatic members of the same genus, and scientists were interested in creating melon-cucumber hybrids that would possess enhanced resistance to mildew and plant viruses. Plant breeders have nicknamed this new fruit, the “melumber”, but its scientific name is Cucumis hytivus.
Please fill in the table attached and answer the following questions.
a.) Assuming that the Hoosier cucumber was produced in a laboratory, briefly describe the most likely method by which it was produced and the biological mechanism involved in the action of the agent utilized by the scientists.
b.) Suppose scientists wanted to employ an alternative approach to producing cucumber plants that were resistant to the cucumber mosaic virus. List the steps involved in producing…
Chapter 29 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 29.1 - What major reproductive adaptations facilitated...Ch. 29.1 - How did seeds, pollen, and pollination affect the...Ch. 29.2 - Why are gymnosperms called naked seed plants?Ch. 29.2 - Prob. 2SBCh. 29.2 - Summarize the steps of the pine life cycle.Ch. 29.3 - Prob. 1SBCh. 29.3 - Prob. 2SBCh. 29.4 - Prob. 1SBCh. 29.4 - Prob. 2SBCh. 29.5 - Name four major ways human societies rely on seed...
Ch. 29.5 - Prob. 2SBCh. 29 - Prob. 1TYKCh. 29 - Prob. 2TYKCh. 29 - Prob. 3TYKCh. 29 - Prob. 4TYKCh. 29 - Prob. 5TYKCh. 29 - Prob. 6TYKCh. 29 - Prob. 7TYKCh. 29 - Prob. 8TYKCh. 29 - Prob. 9TYKCh. 29 - Adaptations that correlate with the adaptive...Ch. 29 - Prob. 11TYKCh. 29 - Discuss Concepts Modern humans emerged about...Ch. 29 - Discuss Concepts Compare the size, anatomical...Ch. 29 - Prob. 14TYKCh. 29 - Discuss Concepts Working in the field, you...Ch. 29 - Prob. 16TYKCh. 29 - Prob. 1ITDCh. 29 - Prob. 2ITD
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- Fruit scientists are trying to determine the role of the pectinase (p) gene in a plant’s ability to tolerate cold conditions. The table shows each of three possible fruit tree genotypes and the percentage of fruit produced at different temperature ranges. Which of the following statements best describes the evolutionary concept illustrated by this example? A. Homozygous genotypes increase fitness in a population. B. Hybrid plants are known to have a disadvantage over homozygous genotypes. C. Natural selection selects against the recessive gene and for the dominant gene. D. Certain phenotypic variations can significantly increase fitness of the organism in particular environments.arrow_forwardOne of the effects of climate change on ecological communities is the disruptionof seasonal timing or phenology. A team of biologists is trying to determine the potential forrapid evolutionary responses of plants to changing seasonal conditions. They do alaboratory selection experiment on flowering time in an annual plant to test for the presence ofadditive genetic variance for this trait. They measure the time between germination andflowering for 400 plants under controlled laboratory conditions and then use 25% with theshortest flowering times to find a second generation in the lab (with pollination based onrandom number sampling). The mean flowering time for the overall parental population was 80days. The mean for the selected 25% of individuals was 60 days. In the offspring generation, themean flowering time was 70 days. 6a. What is the narrow-sense heritability for flowering time for these plants under laboratoryconditions? 6b. If you performed another round of selection on the…arrow_forwardBolting is when a plant starts to spend its energy on producing flowers. Initial bolting time is figured by the number of days from germination to bolting. Rosette area is figured by the average rosette area of the plant at the time of bolting. Researchers created strains of A. thaliana to have varying somatic ploidy levels to study the resulting phenotypes. The graphs show how initial bolting time and rosette area relate to the number of chromosomes in each strain’s somatic cells. Which of the following best describes how a change in genotype affects the phenotype of A. thaliana? The largest average change in both phenotypes occurred from the 2n to the 4n strain. The largest average change in both phenotypes occurred from the 4n to the 6n strain. A lesser number of chromosomes results in plants with a later initial bolting time. A greater number of chromosomes results in plants that have larger rosettes areas.arrow_forward
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