D, because skin tans to help us stand being in the sun without getting burned.
An example of physiological adaption is being able to digest milk. Before, humans were not able to digest milk before we developed enzymes that now make us have the ability to do so, thus allowing us another food source.
I can understand it so wait me aminute i gonna go to google search
Producing lifelike artificial limbs providing healthcare for all people stopping the spread of the HIV/AIDS virus using biotechnology to vaccinate children<span>
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The answer is nucleus.
EXPLANATION
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes.
The nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes.
