True or false: in a single-blind study, neither the researchers or the participants are aware of group assignments.

true

explanation:

a genogram (also known as a mcgoldrick-gerson study, a lapidus schematic or a family diagram) is a pictorial display of a person's family relationships and medical history. it goes beyond a traditional family tree by allowing the user to visualize hereditary patterns and psychological factors that punctuate relationships.

the plates spread at mid-ocean ridges (they are divergent plate boundaries) which allows magma to rise through the weakness between the plates. the magma then emerges as lava from the boundary and cools, creating a new crust.

i-i-i-i-i-i don't k-k-k-k-know.

b) the heart is a pump made of muscle and that is difficult to grow in the lab.