
What is the recommended frequency, intensity, and time to improve cardiorespiratory endurance?
A. 3-5 days/week, 51-65% max heart rate, 45 minutes/workout
B. 3-5 days/week, 51-65% max heart rate, 60 minutes/ workout
C. 5-7 days/week, 51-65% max heart rate, 45 minutes/workout
D. 5-7 days/week, 66-85% max heart rate, 60+ minutes/workout
Select your answer:

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Hospitality › ViewDo foods have a carbon footprint?
A. YES
B. NO
Ecology › View
____________ is the process by which populations change in response to their environment.
A. natural selection
B. adaptation
C. reproductive isolation
D. divergence