Fig. 6.1 shows Vorticella, a freshwater unicellular organism. Vorticella has many cilia, which it uses to feed.
(a)[3]
The length indicated by X-Y in Fig. 6.1 is $150\,\mu\text{m}$. Calculate the magnification of Fig. 6.1. State the formula that you use and show your working. Give your answer to the nearest whole number.
(b(i))[3]
State the name of the process that takes the bacteria into the cell at Z, and describe how it happens.
(b(ii))[3]
Describe the part played by lysosomes in intracellular digestion in Vorticella.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Magnification = image size divided by actual size” …