Numerous barriers can prevent sperm from reaching and fertilizing the egg, this can be that the Sperm may be defected, or lack the required number of mitochondria needed to help move the sperm. Also, if sperm had already fertilized the egg, there is a change that takes place to the membrane surrounding the egg preventing further sperm from fertilizing.
Answer:
In the clinical question Does chronic stress affect inflammatory responses in older men with atherosclerotic disease? There is no comparison, so component C does not exist.
Explanation:
C of Comparison corresponds to the PICO process.
The <u>PICO process</u> is used in the resolution of clinical questions, and serves to enumerate the components that allow the analysis of said question. The acronym for PICO corresponds to:
- <u><em>P</em></u><em>opulation
</em>
- <u><em>I</em></u><em>ntervention</em>
- <u><em>C</em></u><em>omparison
</em>
- <u><em>O</em></u><em>utcome
</em>
In the approach of a clinical question the comparison is established when it comes to appreciating one characteristic with respect to another:
<em>"Do patients with gastritis improve with gastric protectors or only with diet?
"</em>
Here a comparison is established between two therapeutic measures.
In the question "Does chronic stress affect inflammatory responses in older men with atherosclerotic disease?" component C of the PICO process does not exist, because there is no established comparison.
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Clinical information brainly.com/question/1089166
Answer:
1st law: Law of segregation
Explanation:
Mendel’s First Law: Law of Segregation During each round of meiosis, chromosomes are separated into daughter cells. This means that one half of the genetic material goes to one gamete and the other half goes to the other. Mendel’s first law essentially states that the alleles in one locus segregate into separate gametes.
1. The reason why the dark-colored variety was in greater numbers present in the polluted environment is that the dark-colored moths were better adapted to the environment.
The pollution killed the lichens which caused the tree trunks to have a much darker color than before. The dark color of the tree trunks permitted the dark-colored moths to hide and camouflage from the predators. That is why the dark-colored moths were better adapted to the polluted environment.
2. There could be many reasons why the light-colored variety was not completely eliminated from the polluted environment. The light-colored variety could be less effectively adapted to the polluted environment, but it wasn't completely extinct.
This is because the light-colored moths could be resting and hiding in other places and not on the tree trunk. Also, some of the light-colored moths found in the polluted environment could have migrated from other less polluted places. Finally, some of the dark-colored moths could be carrying the allele for the light color.
3. The air pollution control laws could help reverse the environmental destruction caused by the industrialization. This could help in significantly decreasing the air pollution and restoring the balance of the ecosystem. If the pollution decreases, the population of lichens could recover and the tree trunks could be covered again with lichens. This, in turn, would make the color of the tree trunks lighter and the light-colored moths could hide and camouflage on the tree trunks again.
4. The diagram shows the percentage of each moth variety in the two different environments, the polluted and the non-polluted environment.
The percentage of dark-colored moths in the non-polluted environment was closest to 15% and in the polluted environment, it nearly rose to 70%.
The percentage of the light-colored moths in the non-polluted environment was nearly 85% and in the polluted environment it was closest to 24%.
5. The correct answer is "a given trait can be a favorable adaptation in one environment, but not in another environment".
An evolutionary adaptation is a term referring to the characteristics of an organism which help him survive in a specific environment. If the environmental conditions change, the characteristics which were once favorable may no longer be.
This is what all the above information shows; any change in the environment can make a once favorable adaptation disadvantageous.
Chlorofluorocarbons are more commonly known as CFCs. CFCs were once used as refrigerants, <span>propellants (in aerosol applications), and solvents. Once CFCs enter </span>the atmosphere, they slowly<span> rise to the stratosphere. Here, ultraviolet radiation causes the break up of CFCs into their individual chlorine atoms. The chlorine atoms cause the catalytic destruction of</span> ozone<span>. </span>
