Asoil sample is 25 percent sand, 55 percent clay, and 20 percent silt. use the following soil texture triangle to determine the type of soil present in this sample.
a-clay
b- silty loam
c-sandy clay
d-sandy clay loam

A. Clay

Explanation:

The soil texture triangle is used to determine the type of soil present in the sample on the basis of percentage of clay, sand and silt in the soil sample. Putting the values of each soil type (clay= 55%, sand =25% and silt =20), the type of soil present in the same becomes to be "clay".

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.