Release of cross-bridges depends most directly on
A. calcium ions.
B. potassium ions.
C. adenosine diphosphate.
D. adenosine triphosphate.
E. creatine phosphate.
D. adenosine triphosphate.
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Fossils from which would be the oldest from
the Grand Canyon? a. hermit shale. b. redwall limestone. c. temple butte formation. d. bright angel shale. e. vishnu basement rocks
There are ________ different olfactory receptor proteins in humans that allow us to sense a variety of odors
A) 5 to 10 B) 350 to 400 C) 10 to 15 D) 100,000 to 500,000 E) 1,000 to 1,500
During meiosis, the centromeres divide as the cell moves into ______________
a. telophase I. b. prophase. c. anaphase II. d. metaphase II.
Given that humans shifted from hunter-gathers to an agriculturally based society within the last 10,000 years does NOT mean that ________
A) we cannot expect evolution by natural selection in human populations to have kept pace with our changing way of life B) humans still retain many, if not most, of the features that made us well adapted to living in the hunter-gatherer societies of the stone age C) we can use knowledge of the differences between our current lifestyle and the lifestyle of our pre-agricultural lifestyle to better understand both the peculiarities of humans and risks associated with our modern lifestyle D) humans are unique in that we have the capacity evolve by natural selection much more rapidly in response to changes in our environment than other organisms do