Which of the following is not a remnant of an embryonic structure?
A. Hyaloid Canal
B. Inguinal Ligament
C. Ligamentum Arteriosum
D. Ligamentum Venosum
E. Umbilical Ligament
Answer: B. Inguinal Ligament
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The early cell divisions of human development differ from other mitotic cell divisions in that:
A. cells do not replicate all chromosomes prior to dividing; this helps the cells differentiate. B. cells do not grow in size; they subdivide the cytoplasm of the fertilized egg. C. cells move as they divide. D. they are unequal; some daughter cells are much larger than others. E. All of these choices are correct.
Under some circumstances, natural radioactive substances, such as radon gas, can become concentrated and pose a threat to human health.
a. true b. false
In 1910, Charles Davenport opened the Eugenics Record Office at Cold Spring Harbor. He believed "feeblemindedness" was
A) not inherited. B) a result of the influence of many genes. C) caused by the environment. D) the result of a single gene.
Lupus is a disease in which the immune system produces antibodies that attach to various tissues throughout the body, which initiates massive inflammation and tissue death
What type of disease is this, and what sort of treatment may prove effective?