Which of the following statements correctly describe/s natural selection? Galapagos finches give rise to diversity based on their respective environments. O Due to overuse and misuse of drugs, some pathogenic bacteria have become resistant to some of these treatments. O The sturdy houses of Ivatan became popular to resist frequent storms in the islands of Batanes. All of the given choices

Which of the following statements correctly describe/s natural selection? Galapagos finches give rise to diversity based on their respective environments. O Due to overuse and misuse of drugs, some pathogenic bacteria have become resistant to some of these treatments. O The sturdy houses of Ivatan became popular to resist frequent storms in the islands of Batanes. All of the given choices

Name: 2 Which of the following statements correctly describe/s natural selec
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Description: 2 Which of the following statements correctly describe/s natural selection?Galapagos finches give rise to diversity based on their respective environments.Due to overuse and misuse of drugs, some pathogenic bacteria have become resistant to some of t

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter40: Population Ecology

Section: Chapter Questions

Problem 1CT

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Naturalists who have accepted evolutionary theory now propose that: all of the items listed extinction occurs when the food supply becomes nutritionally unbalanced O populations of plants and animals in nature most often consist of individuals that are clones of each other populations of a species that become isolated from others by adapting to different environmental niches quickly become extinct those individuals whose variation gives them an advantage in staying alive long enough to reproduce are more likely to pass their traits on to the next generation
A powerful windstorm moves through a densely populated white oak forest. The oaks in this forest have either smooth or rough bark. The storm randomly knocks down 50% of the white oak trees. The remaining oaks grow and produce seeds that germinate and fill in spaces in the forest. All of the new oaks have smooth bark. Which of these processes is described in this example? O genetic drift O natural selection O mass extinction O geographic isolation
Natural selection can lead to adaptations over time. O True O False
The increase in frequency of the pepper moth's dark morph in England was a result of all of these EXCEPT: dark morph being more visible on light trees O light morph being more visible on dark trees O selective advantage of the dark morph as tree barks became darker due to pollution O birds ability to pick the moths that are more visible on tree trunks natural selection
Elephants have very large heads that necessitate the need for a short, thick neck. Their short, heavily muscled neck prevents them from lowering their head to the ground to graze on grass or drink water from a pond. Elephants have evolved long trunks to reach grass and water. Which kind of selection is responsible for elephants' long trunks? O Stabilizing O Diversifying O Directional
In a population of lizards, color is genetically determined. The current population has two two phenotypes: blue and yellow. Which of the following scenarios could result in evolution by migration? O A disease indiscriminately reduces the population by 90%. Birds are better able to see and therefor prey on blue lizards The population is joined by individuals from a nearby population that has an allele for a red phenotype. Females preferentially mate with individuals exhibiting the blue phenotype.
How does variation in resistance to toxic rough-skinned newts affect the evolution of garter snakes? Variation, generated by natural selection, is necessary for gene flow to alter the resistance in the population. O Variation in resistance exists but does not affect evolution of garter snakes. Individuals with high resistance will be selected for in garter snake populations living in areas with non-toxic rough-skinned newts. Variation in resistance to toxic newts only causes evolution towards greater toxicity in newts. Individuals with low resistance will be eliminated from garter snake populations living in areas with highly toxic rough-skinned newts.
How might an evolutionary biologist explain why a species of birds has evolved a larger beak size by natural selection? O Some members of the ancestral population had larger beaks than others. If larger beak size was advantageous, they would be more likely to survive and reproduce. As such, large beaked birds increased in frequency relative to small beaked birds. O Large beak occurred as a result of mutation in each member of the population. O The ancestors of this bird species encountered a tree with larger than average sized seeds. They discovered that by stretching their beaks, the beaks would get longer, and this increase was passed on to their offspring. Over time, the bird beaks became larger. O The ancestors of this bird species encountered a tree with larger than average sized seeds. They needed to develop larger beaks in order to eat the larger seed, and over time, they adapted to meet this need.
lectors in England noted that most peppered moths collected in the early 1800's were light gray peppered with bits of black. Many ye- s collected were almost completely black.What do the studies of changes between black and light color wings in populations of the c Natural selection can quickly change the most common phenotypes in a population Predators prefer light colored moths Dark colored moths are better than light colored moths Natural selection cannot happen quickly.
Snakes evolved from ancestors who had the ability to walk. Some snakes, in fact, still have small pelvis and leg bones that are remnants from this ancestor. What are these caled? Vestiglal structure O Homologous strucre O Sympatric structure O Molecular homology In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above 30,000. Of what is this an example? Founder effect
If variation in a trait is only due to environmental variation, and not genetic variation, how will directional natural selection change that trait value through time? [select one]: O Natural selection is likely to cause that trait to evolve Can't tell from information provided O That trait will be eliminated O Natural selection will not cause that trait to evolve
Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. VWhales have lost their hind limbs. How can natural selection account for these losses? The ancestors of these organisms experienced harmful mutations that forced them to lose these structures. Natural selection accounts for these losses by the principle of use and disuse. OIf the function of these structures has diminished over long periods of time, each of these structures presented greater costs than benefits. O Natural selection cannot account for losses, but accounts only for new structures and functions.