You are caring for a child with acute lymphoblastic leukemia. she has been genotyped and is homozygous for a tpmt polymorphism, producing very little of the enzyme needed for this drug's metabolism. how would you expect this to affect dosing of the drug 6-mercaptopurine? a. this child should receive only a small fraction of the standard dose. b. this child should receive higher doses than the standard dose. c. this child should receive the standard dose. d. this child should receive the drug intravenously rather than orally.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

How did the miller-urey experiment impact the way scientists think about the origins of life? use what you know about the miller-urey experiments to discuss the factors needed for life to arise, and speculate on whether life could arise on another planet.

Why do bacteria thrive even in hostile environments