<span>It
is truth that most of the unicellular organisms like bacteria, are
among the simplest life forms we know about it, but there are many
other unicellular organisms, like amoebas, warnowiids and algae, that
are far more complex. They can even have thousand of nuclei and be
visible with the naked eye. Some amoeba actively hunt their pray, and
some warnowiids even evolved and structure that functions like an eye;
so even though unicellular, they are not simple organisms at all.</span>
Its D, im pretty sure theres not starch or acid in our DNA
Natural selection<span> acts upon two major sources of genetic variation: </span>mutations<span> and</span>recombination<span> of </span>genes<span> through sexual </span>reproduction<span>. Most </span>mutations<span> do not affect the reproductive fitness of individuals -- some may be beneficial, some may be harmful, and </span>many<span> may be neutral. </span>Mutation rates<span> per gene are generally low</span>
Bones work with muscles and joints to hold our body together and support freedom of movement. This is called the musculoskeletal system. The skeleton supports and shapes the body and protects delicate internal organs such as the brain, heart and lungs. Bones contain most of our body's calcium supply.
