Gene expression can be turned on and off by
1) sequencing
2) signaling
3) morphing
cytokines regulate gene expression, allowing for cell replication and
1) transport
2) division
3) nourishment
the gibberellin hormone causes in plants
1) seed germination
2) plant fertilization
3) cellular reproduction

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.