100hundre point and brainliest to correct answer, if you dont give an appropriate answer them your answer will be reported and removed. Today, scientists can study human cells grown in petri dishes. Explain how this technique builds on the work of early scientists

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Early scientists were only able to study dead human cells in petri dishes. They could not keep cells alive in the lab. Now that scientists can keep cells alive using cell cultures, they can study the living processes of cells. Because of their advanced techniques in growing tissue cells, scientists are able to grow human brain tissue in 3D. This is one of the latest developments. Scientists have been able to grow human tissue cells in 2D for a while now.

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igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

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.