If an isotope's half-life is 100 years
A. in 50 years, only half of the atoms in a sample of that isotope will remain.
B. that isotope will no longer exist in 50 years.
C. that isotope will no longer exist in 200 years.
D. in 200 years, only half of the atoms in a sample of that isotope will remain.
E. in 100 years, only half of the atoms in a sample of that isotope will remain.
E. in 100 years, only half of the atoms in a sample of that isotope will remain.
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Mutations of ________ [two words] in fruit flies can cause appendages to appear in the wrong places, such as legs growing in place of antennae
Fill in the blank(s) with correct word
Soil formation begins with the ________ of rocks and their minerals
Fill in the blank(s) with correct word
The term "paracrine signaling" refers to
a. signaling between cells located far from each other. b. stimulation of a cell by substances produced by the cell itself. c. signaling between cells located close to each other. d. signaling between parenchyma cells.
Which position in a codon is most likely to contribute to the degeneracy of the genetic code?
a. first b. second c. third d. any position e. no position