Which statement would support a hypothesis that most (about the first 70 percent) of human evolution took place in Africa?
A) The earliest fossils found outside of Africa are 1,800,000 years old.
B) No Neanderthal fossils are found in Africa.
C) Homo sapiens fossils are found in Africa and Europe.
D) The oldest fossils are found in Africa.
Answer: A
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The action spectrum of higher plants is bimodal, with two major peaks. Which two molecules largely determine the
two peaks?
a. photosystems I and II b. P680 and P700
c. chlorophyll a and chlorophyll b d. chlorophyll and carotenoid e. ATP and NADH
Which event occurred first?
a. evolution of vascular plants b. evolution of modern humans c. oxygen accumulation in the Earth's atmosphere d. evolution of prokaryotes e. evolution of reptiles
Tunde is abnormally slender. Which of the following conditions is she more likely to have compared to an obese person, given the information in this chapter?
A) hypothermia and injury due to trauma B) heartburn and indigestion C) heart disease and stroke D) cancers
Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates. See the figure below for an overview of the arginine biosynthetic pathway.A strain that can grow in a minimal medium containing arginine, but NOT in minimal media containing citrulline nor in minimal media containing ornithine would have a mutation in the gene that encodes for ________.
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A. enzyme 2. B. enzyme 1. C. both enzymes 2 and 3. D. both enzymes 1 and 3. E. enzyme 3.