2. There are 3 types of polar bears: bears with thick coats, bears with thin coats, and bears with medium coats. It is the fall season and will soon be winter. The temperatures are dropping quickly and the bears must be kept warm or they will freeze to death. Many of the bears have had 2 cubs each, but due to the extreme temperatures many mothers only have one cub left. a. Which bear will natural selection select AGAINST? b. Identify Darwin's 4 points in the scenario above. i. How does the population have variation? ii. Which variation is an adaptation (beneficial)? jii. How is the population overproducing? iv. Which population will descend with modification? FOR?

2. There are 3 types of polar bears: bears with thick coats, bears with thin coats, and bears with medium coats. It is the fall season and will soon be winter. The temperatures are dropping quickly and the bears must be kept warm or they will freeze to death. Many of the bears have had 2 cubs each, but due to the extreme temperatures many mothers only have one cub left. a. Which bear will natural selection select AGAINST? b. Identify Darwin's 4 points in the scenario above. i. How does the population have variation? ii. Which variation is an adaptation (beneficial)? jii. How is the population overproducing? iv. Which population will descend with modification? FOR?

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 3RQ: Which of the following situations will lead to natural selection? a. The seeds of two plants land...

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There are three types of polar bears - ones with thick coats, ones with thin coats, and ones with medium coats. It is fall and soon it will be winter. the temperatures are dropping rapidly and the bears must be kept warm or they will freeze to death. the bears have had an average of 2 cubs each, but due to the extreme temperatures, many mother bears have only one cub left. Darwin's 2nd point is that some variations are favorable. Which of the variations would be favorable in this environment for the population of polar bears?
Natural Selection Fill in the blanks to explain Darwin's theory of Natural Selection using these words: DNA, survive, variation, DNA, reproduce 1. Individuals in a species show 2. This is because of differences in their 3. Individuals with characteristics which suit the environment are more likely to and 4. So the from these individuals is passed onto the next generation.
Which of the following situations will lead to natural selection? a. The seeds of two plants land near each other and one grows larger than the other. b. Two types of fish eat the same kind of food, and one is better able to gather food than the other. c. Male lions compete for the right to mate with females, with only one possible winner. d. all of the above
Which of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a population
Natural Selection Affects the Frequency of Genetic Disorders Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a large population by natural selection?
Which of the following is not a component of Darwins theory as he understood it? a. Some individuals in a population survive longer than others. b. Some individuals in a population reproduce more thanothers. c. Heritable variations allow some individuals to compete moresuccessfully for resources. d. Mutations in genes produce new variations in a population. e. Some new variations are passed to the next generation.
Which of the following ideas is not included in Darwins theory? a. All organisms that have ever existed arose through evolutionary modifications of ancestral species. b. The great variety of species alive today resulted from the diversification of ancestral species. c. Natural selection drives some evolutionary change. d. Natural selection preserves advantageous traits. e. Natural selection eliminates adaptive traits.
The process of natural selection can be described as Group of answer choices 1. an organism changing during its life to be better suited for its environment 2. a cell dividing 3. traits that cause individuals to live longer or reproduce more are seen more often in the next generation 4. none of the above
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What is meant by the following statement? "When mutation is random, natural selection is not." Mark all correct answers Group of answer choices A. A mutation is caused by changes in the environment. B. Natural selection can favor some mutations and not others. C.Mutations for advantageous traits are more likely to be passed on to the next generation. D.Selection can change depending on the environment.
Darwin’s Theory of Natural Selection occurs in 4 steps.Which of the following is NOT one of these four steps?a. Differentiationb. Selectionc. Competitiond. Overproduction
Which of the following best explains the role mutations play in natural selection?A. Most mutations are negative and result in the extinction of the entire speciesB. Mutations may appear for one or two generations, but they usually disappear quickly.C. If the environment changes, an existing organism develops a mutation that will help them to survive.D. Some mutations give individuals an advantage in their environment, allowing them to survive and reproduce.D is my answer is it correct?