What is the main difference between animal cell and plant cell?

There are a few differences between plant and animal cells.  One major difference is their structure; animals are enclosed by a cell membrane, but plant cells have a cell membrane and a cell wall to give them a more solid form.  Another major difference is that plant cells have chloroplasts for photosynthesis whereas animal cells do not because they do not undergo photosynthesis.

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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.