Continental plates pushing together cause mountains to form on our planet earth.
a.
true
b.
false

What did the first language sound like

Which element provides strength to the exoskeleton of clams and oysters

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