Describe the differences between palisade and spongy mesophyll cells. Identify the pathogens for amoebic dysentery and tuberculosis. Name organelle A and list three of its functions.

b)
Palisade cells are elongated and tightly packed, while spongy mesophyll cells are irregularly shaped with large air spaces between them. (Alternatively: Palisade cells contain more chloroplasts than spongy mesophyll cells.)

a)

i) Amoebic dysentery: Entamoeba histolytica (a protozoan)

ii) Tuberculosis: Mycobacterium tuberculosis (a bacterium)

a)
The organelle marked A is the Golgi apparatus (or Golgi complex/body).

b)
Three functions of the Golgi apparatus are:

• Modifying, sorting, and packaging proteins and lipids synthesized in the endoplasmic reticulum.
• Forming lysosomes (in animal cells) and cell plates (in plant cells during cytokinesis).
• Synthesizing carbohydrates such as polysaccharides for the cell wall in plants.