Explain what happens to a red blood cell when it is placed in a pure water?

Distinguish between a trace element and an essential element. Give an example of each.

How is overfishing harmful to the environment?

Extinction is the term used when all members of a species

What is a major challenge of current space exploration? A. developing bigger rockets B. setting a clear goal for the future C. sending unmanned probes to other planets D. securing international cooperation for missions

What is a regulation of the internal environment of an organism?

What is a possible effect of of leakage of inner ear fluid

Louis Pasteur proved that all new cells come from preexisting ones. What concept did Pasteur's experiments disprove

Charles darwin, after observing variability among plant and animal species in various locations, proposed an explanation for what he saw.

Sediments in and below a dewatered area of an aquifer become compacted because:

What is the largest available source of fresh water for drinking in the hydrosphere? A. Groundwater B. Oceans C. Rivers D. Glaciers