After several miles of running and sprinting in intervals, the runner’s muscles ache and feel fatigued. which is the best explanation for what has occurred?
a. the runner's muscles have accumulated lactic acid.
b. the runner’s body has failed to perform cellular respiration.
c. the runner’s cells are relying completely on aerobic respiration.
d. the runner’s muscles have accumulated carbon dioxide.

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment.svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment.svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment.svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.

Adding more tributaries to a local river basin can have what effect?

What characteristic makes a cell membrane selectively permeable