Give an example of how the atmosphere, geosphere, and/or hydrosphere have affected living things throughout Earth's history,

your answer should be c) enjoy!

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.