Responder: en qué nivel de organización situarían a: una molécula de ADN,
una bacteria, un hígado, un cloroplasto, un trozo de hierro, un grupo de
palomas, un pez, un río con peces y algas, un pulmón. ¿cuál de estos niveles
tiene vida?

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.