The problem says "The diagram represents (shows) the synthesis of a portion of a complex molecule in an organism. Which row in the chart could represent the building blocks and product in the diagram?"

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

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.