We de-starch leaves so as to remove the starch produced in it during photosynthesis stored as food. Removing the starch would help us to infer our observations clearly as there is no change or substance that would effect the experiment we want to carry out. For example , the indicators we use might give blue-black or green colors just because of the presence or absence of starch.
Answer:
Allele frequencies change randomly each generation is the example of genetic drift.
C) the lungs.
The air moves down the trachea and into the lungs where it is picked up by the blood
