Landfills are waste disposal sites. they are often man-made depressions in the ground covered with a lining designed to prevent any leakage of waste materials. however, landfills can leak through the base resulting in negative impacts on the surrounding environments. what negative impact to the environment is caused by the production of methane gas in landfills? a) air pollution b) soil fertility c) groundwater pollution d) air pollution, groundwater pollution, soil fertility

What was the land like over 500 million years ago? what was under the sea?

Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?