To test a new drug that has the potential of curing people of the common
cold, a company asked human volunteers who were coughing and sneezing
to participate in a clinical study. the objective of the experiment was to test
whether the new drug could cure the volunteers in the experimental group of
the common cold.

the answer is b: 1.4 km/hr

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.

the fossil record provides evidence of a common ancestor to many species.