Sulfa drugs bind to the active site of the enzyme which normally converts para-aminobenzoic acid (PABA) to folic acid, preventing the production of folic acid and, eventually purine synthesis. In this case, the sulfa drug is acting as a/an:

straight or amphibians are homeothermic to thermal

that scientist would be robert hooke

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.