Shortly after the zygote is formed, it begins the processes of duplication and division, each resulting new cell has the same number of chromosomes as was contained in the zygote. A fertilized egg is called a zygote until it divides into 16 cells, forming a ball-shaped structure called a morula. The events during the zygote stage involves integration of both parents' DNA into the cell nucleus and the beginning of rapid cell division, or cleavage.
It comprises a group of naturally occurring molecules that include fats<span>, waxes, sterols, </span>fat<span>-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. ... The word </span>lipid<span> stems etymologically from the Greek lipos (</span>fat<span>).</span>
<span>One way social behavior increases survival in humans is the increased security from attackers
and other physical threats. Another is that social cooperation increases the likelihood for success in the gathering of required resources for survival such as food. It also increases the chances of survival of offsprings due to the cooperative raising
of the kids within the social grouping.</span>
