I believe it is Organic matter is decayed in the soil because plants get their nutrients from animal waste and dead organisms.
Scientists study DNAto see the genetic changes that occur through generations.
It will be the Egg cell because phenotype is decided in pregnancy
The answer is <em><u>not</u></em> Organisms would be classified based only on physical characteristics!!
I strongly feel that it would be....
<em>--the existing classification system may change to accommodate the new information.--</em>
<em>Reason:</em> Some things would not just be classified by appearance. Rather, this would add more possibilities to classification. We know that plants and dogs look nothing alike yet they are still related through the Domain (Eukarya).
I also took this test and relied on the other answer, sadly, it was incorrect.
I hope i could help! Let me know if this is incorrect. ~ Ninja Cat :D