You come across an article on alien nucleic acid structure. The article states that researchers have discovered a new single-ring nucleotide. Based on your knowledge of nucleic acids here on Earth, which of the following characteristics might apply to this new nucleotide? Select all that apply.A) The new nucleotide is probably a purine.B) The new nucleotide is probably a pyramidine.C) The new nucleotide may be similar to cytosine.D) The new nucleotide may be similar to guanine.E) The new nucleotide may be similar to uracil.
What will be an ideal response?
B, C, E
If the mystery nucleotide is a single ring, then it is probably a pyramidine and would be similar to cytosine, thymine or uracil.
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Apoptosis is ____
a. cell determination b. cell induction c. a mechanism of cellular adhesion d. programmed cell death e. cell differentiation
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The layer of a forest in which decomposition takes place and mineral nutrients are released for reuse by plants is called the
A) canopy. B) understory. C) herb layer. D) forest floor.