Definition: these are the many different types of terrain, characterized by elevation, slope, soil, etc.

Day and night are caused by Earth's revolution on its axis.

A membrane protein that transports two different substances in the same direction

How is the energy in ATP released so that it may be used to drive cellular processes? A. The cell absorbs sunlight to make simple sugar molecules. B. A phosphate is broken off of an ATP molecule to make ADP. C.

Which class of molecules functions as chemical signals?

During lung inflation Multiple Choice surfactant is found in the pleural cavity. the lungs cling to the internal surface of the chest wall as it expands. the intrapleural pressure is higher than the intrapulmonary pressure.

Why is forecasting human population growth more difficult than forecasting population growth in other animals?

You and your physiology instructor are trapped in an overturned ship. To escape, you must swim underwater a long distance. You tell your instructor it would be a good idea to hyperventilate before making the escape attempt.

Thermal vents are found at the bottom of the ocean in the benthic zone.

What is a transitional fossil? what is a transitional fossil? a transitional fossil is in the middle of a direct lineage stretching from ancient forms to organisms alive today. transitional fossils were poorly adapted to their environments.

Explain the processes involving mitosis