This mechanism is where a cell transports a  large substance  or substance from a lower to a higher concentration (requiring energy). _____________

These mechanisms are where a cell transports a substance from a higher to a lower concentration (does not require energy).             A. _____________

Members of a given bacterial species can show many variations and referred to as    

ID the vessel #9  [a]  This vessel is the standard systemic vessel in which  [b]  is measured.

Of the following costs related to the development of natural resources, which one is not a part of depletion cost?

As blood travels from arteries to veins, farther from the heart ___ and ___ decline with distance.  

Blood flow through a capillary bed is regulated by pre-capillary sphincters.  

RNA is synthesized from one strand of DNA inside the nucleus of prokaryotic cells.  

Identify the type of capillaries:  [a]      capillaries with complete lining; blood-brain barrier and abundant in the skin and skeletal muscle.  [b]     capillaries are important in organs that engage in absorption or filtration.   [c]     capillaries are found in blood-filled spaces in the bone marrow, liver, and lymphatic organs.

Which of the following are structures external to the prokaryotic cell wall?