I am very confused
Researchers plotted a distribution curve for leg length in a population of birds, with length from short to long on the x-axis. The curve shifts to the right after a disturbance. Which statement is correct about natural selection in this population of birds?
Birds with long legs were selected for.
Birds with long legs and birds with short legs were selected for.
Birds with medium-length legs were selected for.
Birds with short legs were selected for.
In peppered moth populations, light and dark moths are selected for in different environments. Which type of selection is this, and what would a distribution curve for all peppered moths look like?(1 point)
disruptive selection; a tall, narrow peak in the center of the graph
stabilizing selection; a tall, narrow peak in the center of the graph
disruptive selection; two peaks at the extremes of the graph with a dip in the middle
stabilizing selection; two peaks at the extremes of the graph with a dip in the middle
Over generations, female reindeer in a Finnish population give birth to larger offspring. Which type of selection is occurring, and how would a distribution curve for this trait change over time?(1 point)
stabilizing selection; the curve would become shorter in the middle
directional selection; the curve would shift to the left
stabilizing selection; the curve would become taller in the middle
directional selection; the curve would shift to the right
In a population of mice, individuals with medium brown fur are less likely to be seen by predators than light brown and dark brown mice. What type of selection is this, and what would the distribution curve for the mouse population look like?(1 point)
disruptive; a tall, narrow peak in the center of the graph
stabilizing; a tall, narrow peak in the center of the graph
stabilizing; two peaks at either end of the graph with a dip in the middle
disruptive; two peaks at either end of the graph with a dip in the middle
Paleontologists observed changes in the sizes of black bears as their environment changed. During warmer periods between ice ages, most black bears were small. During ice ages, most black bears were large. Which type of selection is this, and how would a graph of the distribution curve of black bear size change as Earth moved out of an ice age?(1 point)
directional; the curve would shift to the right
stabilizing; the curve would become taller in the middle and shorter on each side
directional; the curve would shift to the left
disruptive; the curve would break into two peaks with a dip in the middle
1. Birds with long legs were selected for.
2. Disruptive selection; two peaks at the extremes of the graph with a dip in the middle
3. Directional selection; the curve would shift to the right
4. Stabilizing; a tall, narrow peak in the center of the graph
5. Directional; the curve would shift to the left
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Yes. Keda is 1000000000% correct for Mathematics of Natural Selection Quick Check!
Did you end up getting the answers? i am very stuck aswell
2 is incorrect for me it was
disruptive selection; two peaks at the extremes of the graph with a dip in the middle
but either way thank you for your help I truly appreciate it you didn't have to but you did anyways.
To answer these questions, we need to understand different types of selection and how they affect population distribution curves.
1. In the first question about the population of birds, researchers plotted a distribution curve for leg length. They observed that the curve shifted to the right after a disturbance. From the given options, the correct statement about natural selection in this population of birds is: "Birds with long legs and birds with short legs were selected for." This shift to the right suggests that both long-legged and short-legged birds had a higher survival or reproductive advantage compared to birds with medium-length legs.
2. In the case of peppered moth populations, where light and dark moths are selected for in different environments, we need to identify the type of selection and the expected distribution curve. Since different environments favor different phenotypes (light or dark moths), this is an example of disruptive selection. The correct answer is: "disruptive selection; two peaks at the extremes of the graph with a dip in the middle." The distribution curve would have two peaks, one for light moths and one for dark moths, with fewer individuals in the middle (representing intermediate shades).
3. When female reindeer in a Finnish population give birth to larger offspring over generations, we need to determine the type of selection and how the distribution curve for this trait would change. This scenario describes directional selection, as there is a consistent shift towards larger offspring over time. The correct answer is: "directional selection; the curve would shift to the right." The distribution curve would shift towards larger values as more and more individuals in the population give birth to larger offspring.
4. In the population of mice, where individuals with medium brown fur are less likely to be seen by predators, we need to identify the type of selection and the expected distribution curve. Since medium brown fur provides a survival advantage over light or dark brown fur, this represents stabilizing selection. The correct answer is: "stabilizing; a tall, narrow peak in the center of the graph." The distribution curve would show a peak in the middle representing mice with medium brown fur, with fewer individuals at the extremes of light or dark fur.
5. Finally, in the case of black bears, where there are changes in their sizes as the environment changes, we need to identify the type of selection and the expected change in the distribution curve. During warmer periods, small black bears have a higher survival advantage, while during ice ages, larger black bears are more likely to survive. This represents directional selection. The correct answer is: "directional; the curve would shift to the right." As Earth moves out of an ice age, the distribution curve of black bear size would shift towards larger sizes, indicating more individuals with larger body sizes.
Remember, these explanations are based on general principles, and the specific circumstances of each population may vary.
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
If we know your choices, then we can evaluate them.