In an organism, a muscle cell has the same dna
as a nerve cell, yet the cells perform different
functions. this is possible because
(1) different mutations occur in each cell type,
changing the genetic instructions
(2) temperature variations within the body alter
dna
(3) proteins in each cell type change the
structure of dna
(4) different parts of the genetic instructions are
used in each type of cell

It is possible because (4) different parts of the genetic instructions are
used in each type of cell.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.