“Slavery, though imposed and maintained by violence, was a n…

“Slavery, though imposed and maintained by violence, was a negotiated relationship…. First, even as they confronted one another, master and slave had to concede, however grudgingly, a degree of legitimacy to the other…. he web of interconnections between master and slave necessitated a coexistence that fostered cooperation as well as contestation. Second, because the circumstances of such contestation and cooperation continually changed, slavery itself continually changed. . . . Slavery was never made, but instead was continually remade, for power—no matter how great—was never absolute, but always contingent.” Ira Berlin, historian, Many Thousands Gone: The First Two Centuries of Slavery in North America, 1998   Which of the following contributed most to the increasing use of African slave labor in North America during the 1600s and 1700s?

You are interested in the role that gene X plays in embryoge…

You are interested in the role that gene X plays in embryogenesis.  Specifically, you want to visualize via brightfield microscopy any morphological changes that may occur over the course of development in the absence of gene X.  Which model organism would be the best choice: