Which line has no slope?
o line a
o line b
o line c
o line d

explanation:

that pic i've attached has no slope

i think the miocene epoch spans the time from 23 million to 12 million years ago.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.