How does the extracellular matrix affect a cell that it surrounds? (select all that apply.)
the cell's shape depends in part on the structure and composition of the extracellular matrix.
the genes that the cell expresses depend in part on the types of proteins in the extracellular matrix.
the size that the cell grows to depends in part on the polysaccharides in the extracellular matrix.
the extracellular matrix has no effect on the cells that it surrounds.
all of these choices are correct.

The cell's shape depends in part on the structure and composition of the extracellular matrix.

The size that the cell grows to depends in part on the polysaccharides in the extracellular matrix.

Explanation:

The extracellular is a suspension of macromolecules that supports the local tissue growth and  maintain  organs. The extracellular matrix directs the morphology of a tissue.

The extracellular matrix  stores  cellular growth factors, which are released locally based on the physiological needs of the local tissue.

The extracellular matrix  transduce signals into cells, which regulate cellular functions such as  growth, proliferation, migration, differentiation, etc.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

it creates acid rain