Potatoes are a type of stem. (True or false?)

Soil nematodes are categorized into three groups. The first group consumes decaying
organic matter, the second group eats other microorganisms, and the third group feeds
on plant roots

A symbiotic relationship is one in which different organisms live together for the mutual
benefit of each other.

When a plant dies, microorganisms help return its nutrients back to the soil through a
process known as the carbon cycle.

Soil forms in layers. These layers lie parallel to the surface of the Earth. As layers are
added, they begin to take on different characteristics. These layers are called soil
horizons.

If soil has a large percentage of clay, the ground will not let enough water through. This
may either cause the water to run off or may hold the water too long and cause problems
for the plant.