The changes in foot structure in a bird population over. Evolution leads to less complex organisms. And also the lock-and-key model.
Answer:
Cell theory is not a law because cell theory does not have enough support to become a law.
Explanation:
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Answer:
francium
Explanation:
The most expensive natural element is francium, but it decays so quickly it can't be collected to be sold.
<span>Sexual reproduction has the potential to produce tremendous genetic variation in offspring.<span>This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.
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