Lysosomes play a role in intracellular digestion by phagocytosis of the material needed to be degraded, thus helping the cell get rid of the wastes. So the excretory system plays a similar role (sweat, sebum,...)
Sex chromosomes determine one's gender. Of the 23 chromosomes humans have, one of the pairs are sex chromosomes. Autosomes make up 22 pairs of the chromosomes. They determine other traits of the body like hair color, eyes, or skin.
Other combinations of the atoms form the four bases: thymine (T), adenine (A), cytosine (C), and guanine (G). These bases are the rungs of the DNA ladder. It also takes two bases to form a rung, one for each side of the ladder ! I hope this helps .
The more air is in the jar, the longer the candle will be able to burn. So the candle in jar 3 probably burned for 4 minutes.
The candle in jar 4 would be able to burn much longer then the others, because it has no lid so air can come through and keep the candle burning.
