Question

substances known to cause cancer are called: *
kinases
carcinogens
stem cells
aster fibers

Explanation:

Carcinogens are substances that can cause cancer by damaging DNA and promoting uncontrolled cell growth. Kinases are enzymes involved in cell - signaling, stem cells are undifferentiated cells with the potential to develop into various cell types, and aster fibers are part of the mitotic spindle in cell division.

Answer:

B. carcinogens