Which of the following was NOT an accomplishment of early sex researcher Magnus Hirschfeld?
A. He established the first journal on the study of sex.
B. He was the first to observe the ovum in humans.
C. He administered the first large-scale sex survey.
D. He established a marriage counseling service.
B. He was the first to observe the ovum in humans.
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A biology student accidentally loses the labels of two prepared slides she is studying. One is a slide of an intestine, the other of an esophagus. You volunteer to help her sort them out. How would you decide which slide is which?
Which of the following vessels carries the venous blood from the lower body into the right atrium?
a) Inferior vena cava b) Superior vena cava c) Tibial vein d) Coronary vein e) Iliac vein
The superficial layer of a kidney is the ________, and it contains the ________.
A. renal medulla; renal corpuscles B. renal cortex; renal corpuscles C. renal medulla; renal tubules D. renal cortex; renal pyramids
What is the function of dendritic cells in the skin?
A. To protect the skin from pathogens B. To allow skin to feel fine touch C. To form a durable, waterproof layer on the surface of the skin D. To give the skin color