Answer:
Cardiac output is affected by fitness level and each of the four factors in the FITT formula.
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Answer:
Friction is a force that always opposes all motion; it always acts in a direction exactly opposite to that in which an object is moving (or trying to move), and typically comes when the surface rubs or drags against another as it moves.
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An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem.
        
             
        
        
        
Either let them know you are there or check your blind spots