Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices The population size is large All variation between individuals is due only to environmental factors The population lives in a habitat where there are no competing species present The environment is changing at a relatively slow rate

Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices The population size is large All variation between individuals is due only to environmental factors The population lives in a habitat where there are no competing species present The environment is changing at a relatively slow rate

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter53: Introduction To Ecology: Population Ecology

Section: Chapter Questions

Problem 15TYU

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Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices Variation between individuals is not heritable. The environment is changing at a relatively slow rate. The population lives in a habitat where there are no competing species present. The population size is large.
If a populations allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c) microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary force
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and gene flow d. gene flow and genetic drift
The graph below represents the number of brown and green beetles collected in a particular ecosystem Change in Coloration of Beetle Population Green beetles Brown beetles Time (years) What is the change observed in the number of green and brown beetles in the population most likely due to? (15.13) O natural selection O selective breeding O a common ancestor O gene manipulation //olamiami.performancematters.com/ola/ola.jsp?clientCode=flMiamiDade# 4:10 PE O Type here to search 3/11/20 Number of Individuals
Choose the assumption of the Hardy-Weinberg equilibrium that best applies to the following statement. "Random changes of DNA can lead to new genes which code for proteins that give an organism a new adaptation." O Random Mating O No Gene Flow O Large Population Size O No Natural Selection O No Mutation
Which of the following factors would not perturb Hardy-Weinberg equilibrium of a population? Infinite population size O Selection O Migration O Mutation O Inbreeding
READ THIS: Notice that natural selection does not refer to individuals changing. Kath Trequency of adaptive heritable traits in a population changes as a result of natural selection. REQUIREMENTS FOR NATURAL SELECTION TO OCCUR: 17a. Assuming that both types of pom-poms are present in the population, what do you think would happen to the pom-pom population if the black forest experienced a prolonged drought so all the trees died and the habitat became red grassland? 17b. Next, think about an alternative scenario. Suppose that natural selection over many generations had eliminated all the red pom-poms in the black forest habitat so only black pom- poms survived. After that, a prolonged drought resulted in this habitat turning into a red grassland. Would natural selection for pom-pom color occur? Why or why not? 17c. The above scenarios are showing that in order for natural selection to occur must exist within a trait.
hich of these conditions would not contribute to the evolution of a population over time An extremely large population size Phenotypic variation that is due to environmental influences only The population lives in a habitat where there are competing species present. The organisms live in an environment that is changing at a relatively slow rate.
Natural selection acts on phenotypes within a population. As a result, over time, the phe- notypic frequencies in a population can change. The graph below shows how the pheno- type of a population changed after selection occurred. Number of Individuals B Value of Phenotype A graph that shows how phenotypic frequency changed before and after selection. с population after selection Which of the following scenarios would most likely result in the phenotypic change shown in the graph above? D original population A A population of rats live on the ground and in short trees. A tree-dwelling snake that preys on the rats is introduced into the area. Warming of the arctic tundra reduces the average snow cover that lighter-colored arctic foxes rely on for camouflage. Darker-colored arctic foxes are better suited to the ex- posed moss and grass habitat. Robins that lay smaller-than-average clutches of eggs produce fewer viable offspring, while larger-than-average clutches of eggs result in…
If natural selection is the only force acting on this population from generation to generation, what do you predict will happen to allele frequencies over successive generations? The frequency of the d allele will increase Allele frequencies will remain constant The frequency of the D allele will increase
What can you conclude about genetic variation and population size? Chose all answers that are true. O As population size decreases, the likelihood of losing alleles increases. O Smaller populations are more like to lose genetic diversity due to drift than larger populations. O Smaller populations lose alleles more quickly, in less generations, than larger populations. O Both allele fixation and allele loss represent loss of genetic diversity.
A species of insect has a gene that determines whether the legs have brown stripes or black stripes, with brown being completely dominant over black. There are 76 BB insects, 50 bb insects and 124 Bb insects. If there were 90 brown individuals and 15 black individuals in the parent population, what can be concluded about the population? * O The population is not evolving. O The population is evolving. Stabilizing selection is occurring. O The population is in Hardy-Weinberg equilibrium.