The replacement model of human evolution asserts that ________
a. Homo sapiens evolved directly from Homo floresiensis
b. Homo sapiens arose from a single Homo erectus population in Africa
c. races of modern humans had their beginnings in Homo erectus
d. populations of Homo erectus in Africa evolved into Homo sapiens gradually
b
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What factors cause oxygen to be released from hemoglobin? Select all correct choices
A. a change in the acidity or pH of blood B. an increase in CO2 in the bloodstream C. the formation of lactic acid by muscles D. an increase in aerobic respiration
The breakdown of pyruvate in the Krebs cycle
results in the release of
a. energy. b. carbon dioxide. c. electrons. d. hydrogen ions. e. all of these
Patterns of species migrations, such as birds that nest in North America during the spring and in South America during the winter, do not alter seasonal patterns of regional diversity for a wide range of taxonomic groups
Indicate whether the statement is true or false
The Oxidase Test is used to determine which of the following characteristics of a bacterium?
A. Whether the bacterium is a gram-positive or a gram negative B. Whether the bacterium is a sacchrolytic or asacchrolytic C. If the bacterium is an obligate aerobe or a facultative anaerobe D. Whether the bacterium utilized the oxidative or fermentative pathway in glycolysis E. none of the above