According to theory, what best describes the universe before the big bang?
a. a star
b. a planet
c. a cloud of gas and dust
d. a densely packed space

What type of pollution does household garbage cause

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

What is the next step in the process after a substrate enters the active site of an enzyme