The graph below shows the range of water conditions preferred by three species of fish in an Ozark stream, Water with which of these conditions would cause the most competition for resources among all three species of fish?

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell