The amount of Oxygen in the blood carried by hemoglobin in the red blood cell is 2%.
a. true
b. false
Answer: b. false
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What is the thick fluid, rich in proteins and lipids, which is deposited in an animal's egg during its formation?
a. germ layer b. placenta c. yolk d. corpus luteum e. gastrula
India is in which demographic transitional stage?
a. birth and death rates equally high; growth rate low b. death rate dropping fast; birth rate declining but slowly c. birth rates declining and approaching the death rates d. birth rate falling below death rate; population size decreasing e. death rate greatly exceeds birth rate; population is close to extinction
What is the name of the chamber located in your throat that is an intersection of the pathways for swallowing and breathing?
The first australopithecine fossils were unearthed in
A. Asia. B. Europe. C. South America. D. North America. E. Southern Africa.