The exact boundaries, limitations, and meaning of species is now known and agreed upon universally

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Which of the following is not a type of epithelial cell

They live on every continent except antarctica