You have generated mutations in the DNA sequence of a eukaryotic promoter at its TATA box, resulting in severely reduced transcription of the downstream gene. You have identified a suppressor mutation at an independent gene locus that restores transcription of this gene. This suppressor mutation is most likely a DNA sequence that encodes:

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.