A heterotroph is an organism that cannot produce its own food. It has to eat/ consume other organisms to sustain its self. An omnivore is an animal that eats both plants and animals. It is a heterotroph because it must eat to live. Same with a carnivore, just that it only eats meat.
Dust and particulate trails point in the direction opposite of the star closest to it. The outgoing solar energy and radiation slowly shaves off matter of the object, and thus creates a tail behind the object. Simply put, the tail is on the dark side of the object.
DNA replicates itself, so no, unlike what it may seem, parent organisms do not loose their DNA. Before the fecundation process, a cool process similar to miosis happens, it is called meiosis. During meiosis the parent chromosome will duplicate it self and break down each of its 46 chromosomes into 4 different new formed cells, which will become the sperm and egg cells. Each of these egg or sperm cells will be different from eachother, which is how you get siblings that don't look alike, however they will contain a copy of the parent's genetic information.
In conclusion;
In the creation of offspring, the copy of the parent's DNA breaks apart into 4 different pieces which will form sperm or egg cells.
They are both sources of energy. They are almost exactly the same however ATP-Adenosine Triphosphate has one more phosphate group than ADP-Adenosine Diphosphate.