Dr. stevens is examining the dna sequences of a group of mice. he notices that in one of the mice, one nucleotide has been substituted with another in the part of the dna sequence that codes for fur color. however, despite the substitution, the mouse still has the same fur color as the other mice that have the typical dna sequence. what best explains why the nucleotide substitution in the mouse does not change its phenotype?

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers