Surface currents, like the gulf stream,

a. river water that flows from land to the ocean
b. winds that flow over the surface of the ocean
c. water that moves at the oceans surface
d. air that flows over the surface of land

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis