Answer:
Amylase
It helps change starches into sugars.
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"Excretory Process" is the process which removes wastes
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who is this Justin Bieber??!
Answer: By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past.
It's both! Scientists really can't agree on it.