Answer:
C
Explanation:
a difference in the pH of an environment changes enzymes activity
B. Science can answer only questions about the natural world.
True
Phloem is used for the transport of minerals
Xylem is used for the transport of water
The doughnut because it contains carbohydrates
Humans have microscopic subunits in the kidneys called <span>nephrons to filter blood, and spiders have </span><span>Malpighian</span><span> tubes to absorb salts and wastes. Hope this helped! :)</span>