<span>Most people's urine is darker in the morning as the kidneys work hard during the night to remove impurities and the urine is more concentrated.</span>
New, more adaptable species flourish, replacing the extinct species.
The selection pressures before the extinction tend to favor a certain type of organism and the sudden shift in conditions help others move up the food chain.
Proteins play the role of unwinding and separating a double-stranded DNA molecule.
When an animal has a feature that helps them to disguise, in this case specifically making the animal blend into the surroundings, this is called a camouflage. A camouflage is a result of a process by which, under the pressure of natural selection, a feature gets prevalent in a species in order to make this species more fitted to the environment. In this case, the penguins are safer in their environment with this feature. This process is called adaptation, and this is a camouflage adaptation.
Therefore, the correct answer is D. adaptation.
