Suggest a reason for the failure of some substances to diffuse through the membrane. hint: the chemical formula for sulfate is s04 and for starch (c6h10o5)700.

Some molecules are too big they cannot diffuse through the membrane, for example starch (glucose)  molecules.

Molecules called lipids have long hydrocarbon chains that determine the way they act. they can be fats, oils, or hormones, and even exist in our cell membranes 

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.