A squid is shown in the diagram. Which structure is labeled X?

mantle
foot
radula
gill

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)