Which unit of measurement should be used to describe the mass of an apple?

What is the difference between an igneous, sedimentary and metamorphic rock

Why is it incorrect to say that mitochondria function only as energy factories with cell

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