Se forman radicales libres cuando los organismos consumen oxígeno para metabolizar glucosa y formar moléculas energéticas. Ross Hardison, de la Universidad Estatal de Pensilvania, dijo: "Mantener el oxígeno bajo control y al mismo tiempo usarlo para producir energía es uno de los mayores equilibrios logrados en la evolución de la vida de la tierra". ¿Qué quiso decir?

What are the four basic classes of organic molecules how do they differ structurally and functionally

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

The chromosomal structure that limits the number of cell divisions of a cell is the the chromosomal structure that limits the number of cell divisions of a cell is the kinetochore telomere histones centromere