Which of the following are not associated with convergent plate boundaries? deep-focus earthquakes
rift valleys
island arcs (island building)
deep-sea trenches

What must be true for natural selection to heppen

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled