3.
the model shows stem cells and the many differen
ells and the many different types of cells they may become.
stem cells
cardiac cells
muscle cells
soo
intestinal cells
blood cells
liver cells
nerve cells
which statement describes the stem cells and how they become new types of cells?
a
b
they are embryonic stem cells that differentiate based on the expression of specific genes
and the influence of external chemical signals.
they are adult stem cells that replicate based on the expression of specific genes and the
influence of external chemical signals.
they are embryonic stem cells that differentiate into cell types similar to their tissue of origin
when their dna mutates.
they are adult stem cells that replicate into cell types similar to their tissue of origin when
their dna mutates.
c
d