The excretory system is intended to remove any solid/fluid waste from your body, such as urine.
Helicase. It unwinds and breaks the hydrogen bonds so other molecules can move on to the DNA strand and begin replication.
<span>Humans have 23 Chromosomes </span>
Hypocenter is the exact location beneath the earths surface where the earthquake began.
Antibiotics are, initially, molecules naturally synthesized by microorganisms to fight against bacteria competing with their environment. This created a pressure of selection on the bacterial populations, leading to the appearance of resistant strains. In fact, when an antibiotic is used, only bacteria with defense systems against this molecule survive (and reproduce).
hope this helps
