Which approach would help to identify biologically produced sulfur in a sediment sample?
A) enrichment
B) isotopic fractionation
C) microautoradiography
D) microelectrodes
Answer: B
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The movement of sucrose and H+ into the cell by a common membrane protein reflects transport through a
A. voltage-gated channel. B. mechanosensitive channel. C. uniporter. D. symporter. E. antiporter.
If two organisms of different species share more similar DNA sequences with each other than with other species, we can conclude that ________.
A. these two species are very closely related B. there is no relationship between similar DNA and how closely related organisms are C. these two species happen to share similar DNA by chance D. these two species are not closely related
In Septicemia, why do we see DIC?
A. Fever was triggered B. The complement system was activated and needs to get to the infection C. Your liver needs more blood to filter D. Your body is slowing the spread of toxin E. Your kidneys are slowing their filtering system F. Your heart is not able to pump as much blood
In California, a species of salamanders were geographically separated over time. The group that lived in southern California relied heavily on large gold blotches on their skin that helped to camouflage them from predators. The group that lived along the coast adopted a color pattern that mimicked a poisonous, colorful newt common to that area. Instead of being camouflaged, these salamanders advertised their colors. What type of selection process has occurred over time?
A. artificial selection B. natural selection C. theoretical selection D. experimental selection