1. What is the surface area to volume ratio of an approximately spherical shaped
ID: 255402 • Letter: 1
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
B. Concentration gradient for gases that are exchanged between the respiratory medium and the respiratory surface
Explanation / Answer
ANSWER 1.
Surface Area of an approximately spherical shaped organism = 4?r2
Volume of an approximately spherical shaped organism = (4/3)?r3
Surface Area to Volume ratio of an approximately spherical shaped organism = 3/r
Surface Area to Volume ratio of an approximately spherical shaped organism with a body radius of 3m = 3/r = 1
ANSWER 2.
Surface Area of an approximately spherical shaped organism = 4?r2
Surface Area of an approximately spherical shaped organism with a body radius of 3m
= 4?r2 = 4 * ? * 3 * 3 = 113.097 ~ 113.10 (since nearest 2 decimal places)
ANSWER 3.
The driving force for respiration:
B. Concentration gradient for gases that are exchanged between the respiratory medium and the respiratory surface
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