Describe how the changing species concept has affected classification systems

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

The body is protected against harmful flu viruses by

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy