Do hens have teeth, if yes what is it called.

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 cell structures is significantly different between gram- positive and gram-negative bacteria?

Abacteriophage typically attaches to the bacterium and then