There are currently 8,614,790 lane miles of road in the lower 48 states. The average width of a highway lane is 11 feet. This means roads cover 17,947 square miles of land, or just six-tenths of 1 percent of the total land area of the contiguous 48 states.
Role of the centrosome in cell cycle progression. Centrosomes are associated with the nuclear membrane during prophase of the cell cycle. In mitosis the nuclear membrane breaks down and the centrosome nucleated microtubules (parts of the cytoskeleton) can interact with the chromosomes to build the mitotic spindle.he centrosome replicates during the S phase of the cell cycle. During the prophase in the process of cell division called mitosis, the centrosomes migrate to opposite poles of the cell. The mitotic spindle then forms between the two centrosomes. Upon division, each daughter cell receives one centrosome.
All animal cells have two small organelles known as centrioles. The centrioles help the cell to divide. Centrioles are seen the process of mitosis and meiosis. The centrioles together are typically located near the nucleus in the centrosome.Centrosomes is granular mass that is the organizing center for the microtubules. The position of the centrosome within the centrosome is at right angles to each other.entrioles are seen the process of mitosis and meiosis. The centrioles together are typically located near the nucleus in the centrosome. Centrosomes is granular mass that is the organizing center for the microtubules. The position of the centrosome within the centrosome is at right angles to each other.