What percentage of fertilized eggs fail to develop

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

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