Buildup of organisms means that the species number is pretty high.
Gradual change means that it was a slow, calm time to make the change.
I hope this helps!!
Emperor penguins need lungs to breathe. In penguin lungs, air never stops. ... Once the air goes farther into the trachea it splits into two different directions into both lungs. To get the oxygen into the blood cells, it must come "within small distance of the penguin blood cells".
C
in the first paragraph a fact is challenged
and the second one provides an example
Answer:Specific proteins are made only at certain times in certain cells.
Explanation:
B. Tundra - only biome with snow
