Zebra mussels were first discovered in north america in the great lakes in 1988. this invasive species eats phytoplankton and other microscopic organisms in fresh water. what would be the most likely effect if zebra mussels are introduced into a local fresh water lake?

the ecosystem would benefit from the increased competition for food and increased diversity.
the ecosystem would be harmed as other phytoplankton-eating organisms would have less to eat.
the zebra mussels would only affect the lake if it already contained another species of mussels.
the zebra mussels would benefit the lake especially species higher up on the food chain.

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off