Answer:
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
B. Macromolecules is the answer.
Answer: C.
Explanation:
Slaves did not have any rights
Answer:
Nitrogen-fixing plants, such as lupines (Lupinus sp.), are critical to primary succession, as these species enrich the otherwise intolerable soil and allow other species to subsequently establish [2].
Explanation:
