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When you excersise, your target heart rate should be between 25% to 70% of your maximum heart rate. Your target heart rate r at 70% can be determined by the formula r=0.7(220-a) where a represents your age in years. Solve the formula for a.</span>
Answer:It affects the diffusion across a membrane
Explanation:
Since this is placed in the AP section, I assume it is AP Biology, which the syllabus puts emphasis on diffusion
The smaller the ratio is, the bigger the cell. SO, if the ratio is small enough, the molecule will not be able to diffuse through the membrane. Keep that in mind when you calculate different rations using the radius.
If this is for edge, the answer should be b.
Hope this helps!