Science - Biology

Question 1

Diffusion

Answer 1

The process where an area of highly concentrated particles filters through a semi-permeable wall to an area of low concentration.

Question 2

Cellular respiration

Answer 2

The process of which cells use to create energy using glucose and oxygen with a bi-product of carbon dioxide and water
- C6H12O6 + O2 = H2O + CO2 + ATP

Question 3

SA:V

Answer 3

The ratio explains the relationship between the surface area and volume and is usually modelled with a cube
- As a rule of thumb, the volume increases at a faster rate with the constant between their direct proportion being 6/side = SA: 6/s * V
- So as the side length increases, the ratio between SA:V decreases
- As a result, in biological terms the bigger a cell is the smaller the the ratio and because it requires diffusion to function and diffusion requires a high SA:V, the cell needs to be small