A) La respiración se realiza en presencia del aire. b) En la se producen las enzimas para ayudar en la función respiratoria.
c) Las bacterias pueden presentar respiración anaerobia.
d) La es un tipo de respiración empleado por hongos unicelulares.
e) Cuando el ácido pirúvico permanece en el citoplasma celular donde es transformado en ácido, éste sirve para
producir respiratoria.

      n

50% lit on the left side

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

cell division is not regulated in tumor cells.