Answer:
three types of stimuli—mechanical, thermal, and chemical; some endings respond primarily to one type of stimulation, whereas other endings can detect all types. Chemical substances produced by the body that excite pain receptors include bradykinin, serotonin, and histamine."
Explanation:
From edge
It should be natural selection since there is no external influence implied. (like environment or genetic mutations.)
Leukemia can be treated using human stem cells to attack and destroy cancer cells.
Answer:
Biología celular o citología: rama de la biología que se centra en el estudio de la estructura y función de las células. Biología del desarrollo: es la rama que analiza cómo es el desarrollo de los seres vivos desde que se conciben hasta que nacen.
A genetic mutation. It's known as malformation. It can be caused by a trisomy in one of the alleles, or an affected gene.
