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?

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

the answer is sex-linked recessive.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.