The stable daughter element, or final decay product, of uranium 238 is ________
a. nitrogen-14
b. thorium 234
c. lead 206
d. plutonium-239
c
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Cells that undergo apoptosis are essential to the organism throughout their life
Indicate whether the statement is true or false.
What is the significance of genetic variation?
a. it influences population interactions b. it interacts within the biosphere c. it is the raw material for sexual reproduction. d. it is the most fundamental level of species classification e. it is the raw material for adaptation, speciation, and evolution; and it is the most fundamental level of biological organization
What interests you most about the ocean and its inhabitants?
1.effects on global climate 2.productivity/ food source 3.scientific research 4.recreation
Which of the following best describes the conversion that occurs during nitrogen fixation?
A) ammonium to nitrate B) nitrate to ammonium C) nitrogen to ammonium D) nitrogen to ammonium or nitrate