After several generations of labeling cells in 15N media, the cells are switched to 14N media for one generation. The DNA extracted after one generation in 14N media was centrifuged in a cesium gradient. The DNA formed a single band with a density somewhere between DNA grown in 15N media and DNA grown in 14N media. This data is consistent with which replication model:
A) conservative replication only
B) conservative and dispersive replication
C) semiconservative replication only
D) dispersive replication only
E) semiconservative and dispersive replication

Option E

Explanation:

The experiment that was conducted for the labeling of cells in 15 N media and then for a generation in 14N media shows two replication model

One is the semi-conservative model in which a single strand of the DNA acts as the template strand to make new complementary copies of DNA.

The other model is the dispersive replication which shows the hybrid of two DNA. The parental and the daughter cells are both shown in the newly synthesized DNA.

Hence, the correct answer is Option D

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.

b. read the phase at the intersection of any given temperature and pressure.