How do mammals, including humans, solve the "dosage problem" caused by the presence of an x and y chromosome in one sex and two x chromosomes in the other sex?.

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)

14. which of the following codons code for threonine? a. ucg b. ugu c. cga d. aca