The job of the placenta is primarily associated with
A. nourishment and waste removal.
B. separation of the layers of embryonic tissue.
C. protection of the fetus from infection.
D. development of the outermost tissue of the embryo.
A. nourishment and waste removal.
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In the United States, Candida albicans causes approximately __________ of the cases of vaginitis.
A) 10% B) 25% C) 33% D) 50%
The pulmonary vein carries blood that is rich in oxygen back to the heart. Is there anything unexpected about the name of this vein?
A. There is nothing unexpected about the name of this vein. B. Veins usually carry blood that has been depleted of oxygen. C. Pulmonary refers to veins that carry blood to the lungs. D. Veins usually carry blood away from the heart.
In the absence of oxygen, can cells utilize the electron transport chain?
A. No, oxygen is a required cofactor for the complexes in the electron transport chain. B. Yes, in the case that a cell can use a terminal electron acceptor other than oxygen, it can make use of the electron transport chain. C. No, oxygen is the primary electron acceptor in electron transport chains in all cell types. D. Yes, all cells can make use of the electron transport chain in the absence of oxygen via fermentation.
The tree of life:
a. provides us with a map of the history of life. b. provides us with a map that reflects the process of descent with modification. c. connects evolutionary history to the current diversity of life on Earth. d. All of the above.