Which of the following was most likely not present in creating the amino acids of early earth's water of the past? a. ammonia b. sulfur c. nitrogen d. hydrogen

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

What is a metal replacement reaction

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood