The part of biology that deals with very large data sets to compare organisms or to compare many cells of one organism at the molecular level is

Bioinformatics. The Bioinformatics develops methods and software tools for understanding biological data, in particular when the data sets are large and complex.

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.

is this a question? wassup