Part B: Meiosis I During meiosis I the cell divides into two diploid daughter cells. 4. Pair up the chromosomes to form tetrads. Use the longer tetrad to model crossing -over. Make a drawing of the tetrads in the space below.

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.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.