Remember to write out your calculations and explanations for ALL problems. Plasmodesmata are cytoplasmic connections across plant cell walls that connect adjacent cell cytoplasms. Some cells have few plasmodesmata connections while others have more; this is due to genetics, age, and location within the plant. The density of plasmodesmata within the cell membrane ranges from a high of 25 per square micrometer to a low of 0.2 per square micrometer. The average plasmodesmata tube is 40 nm in diameter. Diagram of plasmodesmata between two plant cells a. What percentage of the cell membrane surface area is composed of plasmodesmata at the high density? (Assume the area of one end of a plasmodesmal tube is a circle -see image above) b. What percentage of the cell membrane surface area is composed of plasmodesmata at the low density?