Natural selection can be defined as the phenomenon by which the environment changes and the to fit into the environment the genetic makeup of the organism changes in order to suit into the changing environment.
The organism that is fit to suit into the changing environment is favored and the organism that does not fits into the environment dies.
So, natural selection can be said as survival of the fittest.
<em>yes it is right because if we take example of viruses and germs .. new germs and viruses are much modified as compared to old ages because they adopted the ways they can escape from the immunity.. they have an adoption to transmit their DNA material ,also they can take protein coat of host because of which host's immunity cells cannot recognize germs as foriegn particle..and in this way germs and viruses remain for a long time in body due to the adoptations according to age and environment..</em>
A head injury happens due to trauma to the brain or skull and classified as close or sometimes penetrating. It may occur right away or develop slowly. An example is contusion which is the answer on this scenario. This is called mild traumatic injury caused by a blow on the head yet none of the tissue of the brain is torn.
<span>75 percent of the older adults who die by suicide visited a physician within a month before death. </span>It is recommended to visit the physician often when depression is experienced to help understand the feeling and could come up with a resolution to this grave problem. Answer is A.
