About how long ago did our solar system form? 3.8 billion years ago 4.6 billion years ago 5 billion years ago 13.7 billion years ago

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

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