Take the chemical caffeine for example. The more coffee concentration plants are exposed to the less growth, number of roots, and mitosis in each cell. Other things in nature that might affect the growth rate of plant cells are sunlight, water, space, temperature, nutrients, bacteria, weeds, allelopathy, insects, soil, etc. In areas where there are very few plants growing, the following abiotic factors may be affecting the plant's ability to thrive as well as the rate of mitosis: light, water, soil, nutrients, space and temperature. The few plants living are competing for sunlight, water, and nutrients a plant needs to perform photosynthesis. If this scarce number of plants is competing for sunlight then they are additionally competing for space as well. Drastically changing temperatures can also negatively affect plant growth and mitosis because the plant will have to adapt quickly to both hot and cold temperature conditions. When comparing paved areas like the cracks in a sidewalk to soil areas, there is a clear difference in which would benefit cell growth and mitosis rate and which would negatively benefit cell growth and mitosis rate. Plants in soil areas wouldn’t have as much to compete for as paved areas (Franco). Additionally, the following biotic factors may affect both the rate of mitosis and the growth rate:…