The fact that the live birth rate from older mothers using oocytes in IVF from much younger women is much higher than from older mothers using their own oocytes indicates that the age effects on reproductive success reflect
A) the oocyte source.
B) the uterus source.
C) the age of the father.
D) the sperm count.
A) the oocyte source.
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What term describes a relationship in which two species have a prolonged close association?
a. symbiosis b. commensalism c. mutualism d. predation e. parasitism
A small amount of fluid is contained in the pleural cavity to
A) promote the exchange of nutrients with both lungs. B) allow gas exchange between the lungs and the blood stream. C) allow white blood cells and macrophages access to foreign antigens entering the body through air. D) function as a lubricant as the lungs move during ventilation. E) serve as a shock absorber for the lungs during body movement.
The most severe illness associated with leptospirae, with symptoms of liver, kidney, and/or vascular dysfunction with lethal pulmonary hemorrhage and sometimes death, is called:
a. icteric leptospirosis. b. anicteric leptospirosis. c. Vincent's disease. d. syphilis.
At high altitudes, people with heart disease may experience
a. "the bends." b. reduced breathing rate. c. decreased production of red blood cells. d. angina. e. reduced hemoglobin concentrations.