Which statement is accurate about natural selection?(1 point)
Responses
It is a biological process that prevents species from adapting to significant changes in their environments.
It is a biological process that prevents species from adapting to significant changes in their environments.
It is a biological process that causes certain traits to be expressed less with each subsequent generation.
It is a biological process that causes certain traits to be expressed less with each subsequent generation.
It is a biological process that allows a population to have a competitive advantage in many environments.
It is a biological process that allows a population to have a competitive advantage in many environments.
It is a biological process that leads a population to have a widespread expression of an advantageous trait
7 answers
It is a biological process that allows a population to have a competitive advantage in many environments.
Mosquitoes can carry and transmit many diseases to humans. In the past, the insecticide DDT was heavily used to reduce mosquito populations in order to reduce instances of disease transmission. However, after some time, mosquito populations developed a resistance to DDT, which made the DDT less effective in reducing mosquito populations.
Based on what you’ve learned about natural selection, in 3–5 sentences, describe how mosquitoes may have come to develop this resistance.
Based on what you’ve learned about natural selection, in 3–5 sentences, describe how mosquitoes may have come to develop this resistance.
Mosquitoes may have developed resistance to DDT through the process of natural selection. Initially, within the mosquito population, there would have been genetic variation in terms of susceptibility to DDT. When DDT was heavily used, the mosquitoes that had genetic mutations that allowed them to survive exposure to the insecticide had a higher chance of surviving and reproducing. Over time, these resistant mosquitoes would pass on their genetic traits to their offspring, leading to an increase in the population of DDT-resistant mosquitoes. This is an example of natural selection favoring traits that provide a survival advantage in a changing environment.
In three to five sentences, construct an argument for the claim that natural selection leads to evolution. Provide evidence for this claim, and be sure to explain how an organism shows the four parts of the process of natural selection. You may use any organism with the exception of bacteria and antibiotic resistance.
Natural selection leads to evolution as it is the process by which organisms with advantageous traits for their environment are more likely to survive and reproduce, passing on these beneficial traits to future generations. This gradual accumulation of advantageous traits results in changes in the overall characteristics of a population over time, ultimately leading to the emergence of new species. An example of this can be seen in the peppered moth (Biston betularia), during the Industrial Revolution in England. Prior to industrialization, light-colored moths were well-camouflaged against lichen-covered trees. However, as industrial pollution darkened the tree trunks, dark-colored moths became better camouflaged and had higher survival rates. This change in environmental conditions led to an increase in the population of dark-colored moths, demonstrating the four parts of natural selection: variation in moth color, heritability of color traits, differential survival based on color, and differential reproduction of surviving moths. This process of natural selection ultimately led to the evolution of the peppered moth population towards predominantly dark-colored individuals.
Imagine you are a paleontologist trying to find the “missing link” between different species. In three to five sentences, create a fictional narrative about your discoveries, describing: 1) what two species, mythical or real, you are studying, 2) what evidence you have linking these species, and 3) what evidence you have to define different correlations and causations that support your hypothesis.
As a paleontologist, I am studying the transition between the ancient species of dragons and modern-day birds. In a remote region, I uncovered fossilized remains of a creature with reptilian features such as scales and clawed wings but also avian characteristics like feather impressions and a beak. The clear presence of features from both dragons and birds suggests a direct evolutionary connection between the two species. Further analysis of the bone structure revealed a unique combination of traits, indicating a gradual transition from reptilian to avian adaptations over time. This discovery provides compelling evidence of an evolutionary link between the majestic dragons of legend and the graceful birds we see today.
1 answer