Which is a nonpoint source of pollution? A)Tourists throw the trash into the ocean.
B)A car mechanic pours oil on the ground.
C)Rain contains chemicals that seep into the ground.
D)A pipe dumps waste from a factory into a stream.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion

Which statement explains which component is likely to be more powerful in explaining a scientific phenomenon? a) component c, because a theory is often passed on possibility and not certainty b) component d, because a hypothesis is often based on possibility not certainty c) component c, because the ability to explain several occurrences in the natural world is a characteristic of a hypothesis d) component d, because the ability to explain several occurrences in the natural world is a characteristic of a theory