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vladimir1956 [14]
3 years ago
14

The first major wave of morphine addiction occurred during the ______.

Biology
1 answer:
stich3 [128]3 years ago
6 0
Answer is - american civil war
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Which vessel of the heart receives blood during right ventricular systole?
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In order to understand the question let's retrace the path of blood in the right side of the heart. From the superior and inferior vena cava, the blood is recieved body, and is deoxygenated. From there the atrium pushed blood into the right ventricle. The right ventricle and left ventricle contract during systole pushing blood into two vessels. The vessel your concerned about, needs to be oxygenated, so it is presumed the blood is pumped into the pulmonary artery. 

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4 years ago
In a histology section of the digestive tract, you observe that the mucosa is made of simple columnar epithelium and the tissue
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The correct answer is - stomach.

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3 years ago
Which of the following is a source of genetic variation within a species?
nadya68 [22]
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4 years ago
Lithium has 3 electrons. why do 2 electrons go in the first shell, and one in the second?
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Answer:

B) The first shell only holds 2 electrons so the 3rd electron had to go in the second shell.

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