Which of the following statements about nucleotides is (are) true?
A) A nucleotide contains a nitrogenous base.
B) A nucleotide contains a pentose.
C) A nucleotide contains a phosphate group.
D) All of the above statements are true.
D) All of the above statements are true.
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Ribotyping
A) bypasses sequencing and sequence alignments. B) exploits unique DNA restriction patterns. C) allows discrimination between species and different strains of a species. D) bypasses sequencing and sequence alignments, exploits unique DNA restriction patterns, and allows discrimination between species and different strains of a species.
During microscopic examination of potential cancer cells, some of the cells are graded as anaplastic. This means they
A) divide slowly. B) are easily identified to tissue of origin. C) are poorly differentiated. D) respond well to chemotherapy. E) are not aggressive.
Why is pollen considered an important adaptation to land?
What will be an ideal response?
Provide evidence to both support and refute the current existence of life on Mars? What will be an ideal response?