Bogs are characterized by
a.
the presence of trees
b.
the presence of herbaceous vegetation
c.
covering a large land area
d.
acidic groundwater

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.