3.3.1 surface area to volume ratio

Question 1

describe the surface area to volume ratio in smaller organisms compared to larger

Answer 1

smaller organisms have a surface area that is large enough ,compared with their volume, to allow efficient exchange across their bodies surface. However as organisms become larger, their volume increases at a faster rate than their surface area. Because of this simple diffusion of substances across the outer surface can only suit the needs of relatively inactive organisms.

Question 2

how do you work out the surface area of a sphere

Answer 2

4pieR2

Question 3

how do you work out the volume of a sphere

Answer 3

4/3 pieR2