When the effects of genes add up to make the phenotype, they are called additive genes.
Answer:
Heyaaa!!! Your answer for this question will be....
Explanation:
!!! <u><em>Stimulus aka (D)</em></u> !!!
<em>Lmk If You Have Any More Questions!</em>
<em />
<em> </em><em>Have A Nice Day!!</em>
<u><em>~Pinky~</em></u>
The answer is mutation
of genes. The mutations were beneficial and gave the individuals of the population
advantage and hence increased their survival. The classic features of birds
evolved one by one and gave birds advantage over their dinosaurs counterparts, especially the feature of small size.
The writing materials,the envelopes and the stamps are all made of paper and this led to a great waste as the papers have to be disposed after use. This is not the case with electronic mails. Electronic mails do not need paper at all and it has drastically reduce the amount of papers that is used in writing letters.
I hope this helps :)
