Question

1. What is the surface area to volume ratio of an approximately spherical shaped organism with a body radius of 3 m? (please submit your answer to the nearest two decimal places and without units)

2. Assuming a spherical body shape, what is the surface area of an organism with a radius of 3 m? (please answer to the nearest 2 decimal places and do not provide units)

3. What is the driving force for respiration?

A. A large, moist surface area

B. Concentration gradient for gases that are exchanged between the respiratory medium and the respiratory surface

C. A respiratory pigment

D. Countercurrent movement of two fluids in opposite directions