awesomegrill
04.11.2020 •
Biology
What process makes the birth of a star?
A.Supernova explosion
B.when it begins combining hydrogen to form helium
C.when gravity pulls in nebular dust
D.when it madd expands and cools
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Ответ:
B
Explanation:
because it combined with hydrogen and helium
Ответ:
The enzyme is a catalyst, meaning it is speeding up the chemical process.