A) test the null hypothesis that the mean blood levels of dde are identical for women with breast cancer and for healthy control subjects. what do you conclude? b. would you expect a 95% confidence interval for the true difference in population mean dde levels to contain the value 0?

Anita thinks that she has heterozygous alleles for red hair.if she is correct, which of these diagrams best illustrates anitas alleles pf red hair

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

What element is able to combine with itself and hydrogen to form large molecules ?