Which prevents the fac genes in the dna of e. coli from being expressed most of the time?
the lac repressor
the lac operator
the lac promoter
the lac locator

Ithink it’s c or b for the answer.

Centriole.centrioles are present in animal cells but are usually absent in plant cells.

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

The answer is 25.1  wont let me give a short have a nice day?