<span>A major reason for Herbert Hoover’s landslide victory in the 1928 election was the prosperity of the 1920's. In the early 1920's there was a large economic boom and Herbert Hoover pledged to continue that. </span>
<h2>Answer:</h2>
The process by which organisms keep everything inside their bodies within certain limits is called <em> homeostasis.</em>
<h3>Explanation:</h3>
Homeostasis is the ability or tendency to maintain internal stability in an organism to overcome for environmental changes. An example of homeostasis is the human body keeping an average temperature of 37 C degrees.
According to definition, A option is correct.
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A homologous pair is required to determine the outward expression of a trait
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Answer:
The most superficial layer of the pericardial sac is the fibrous pericardium.
Explanation:
The human heart is a hollow, muscular organ located in the chest between the lungs, posterior and slightly left of the breastbone (sternum) and superior to the diaphragm. The heart together with the blood vessels form the circulatory system. The heart pumps blood to other parts of the body via the blood vessels. The heart is enclosed in a fluid- filled double layered sac known as the pericardium. The layers of the pericardium are the fibrous (outer) and serous (inner) pericardium. This covers the heart and the roots of great blood vessels. The pericardium provides mechanical protection for the heart and great vessels, while the fluid in the sac lubricates the heart to reduce friction between the heart and the surrounding structures.
