Which of the following describes the properties of ferns?
a) they don't have vascular tissue and reproduce with spores.
b) they have vascular tissue such as xylem and phloem and reproduce with seeds.
c) they don't have vascular tissue and reproduce with seeds.
d) they have vascular tissue such as xylem and phloem and reproduce with spores.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

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.