Billy's condition is the result of:
- a disruption in his myelin sheaths.
<h3>
Multiple sclerosis</h3>
This disease of the nervous system ocurrs when the <u>myelin sheaths</u> are affected, in this affects the brain and the spinal cord, slowing down the signals obtained by the brain and the answers of this.
Multiple sclerosis can cause coordination and balance problems, in the same form that muscular weakness, by this reason, Billy has troubles walking and running.
If you want to learn more about Multiple Sclerosis, you can visit the following link: brainly.com/question/25038571?referrer=searchResults
Answer:
The description corresponds to an observational study.
Explanation:
In Observational studies, researchers observe the effect of a risk factor without changing what is exposed to it or its conditions. On the other hand, in an experimental study, researchers can introduce a change and study the effects of it.
I think it would be Morocco
Answer: Celtic Sea
Fraggle Rock is a children's puppet television series created by Jim Henson.
Exterior footage of Fraggle Rock was filmed at St. Anthony's Lighthouse located near Falmouth in Cornwall. This means that the lighthouse is located near the Celtic Sea. This sea is an area of the Atlantic Ocean off the south coast of Ireland. Its limits are unclear, but are often considered to be: Saint George's Channel, Bristol Channel, the English Channel and the Bay of Biscay. The name is mostly used by marine biologists, oceanographers and the oil industry.
Answer:
Directional selection
Explanation:
Directional selection is a mode of natural selection in which <u>a phenotype is favoured among other phenotypes </u>and therefore the population with the phenotype favoured increases over time to optimize their chances of survival.
This selection usually <u>requires a force in nature that causes a population to evolve towards one end of a trait spectrum.</u>
In this example, dark-colored moths are selected by predators because they stand out to predators against the light-colored foliage. Therefore, <u>this force in nature causes moths to change their phenotype and it shifts away from the dark-colored phenotype in order to increase their chances of survival so that predators do not predate them as easily because they won't stand out against the light-colored foliage. </u>
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Thus this is an example of directional selection.