I believe the answer is head-on and port (left). The side lights are usually visible to vessels approaching from the front or the side. The red light usually indicates a vessel's port (left) side while the green light indicates a vessel's starboard (right) side. These lights ensure that there is safety at night as the vessels navigate.
Incremental dating techniques allow the construction of year-by-year annual chronologies, which can be temporally fixed (i.e., linked to the present day and thus calendar or sidereal time) or floating.
Archaeologists use tree-ring dating (dendrochronology) to determine the age of old pieces of wood. Trees usually add growth rings on a yearly basis, with the spacing of rings being wider in high growth years and narrower in low growth years. Patterns in tree-ring growth can be used to establish the age of old wood samples, and also give some hints to local climatic conditions. This technique is useful to about 9,000 years ago for samples from the western United States using overlapping tree-ring series from living and dead wood.
Agree
<h3>Living near nature help you to keep your mood in positive way!!!</h3>
- When i study with nature i feel very good.
- Nature is my best friend!
<span>The gastric lipase is more relaxed compared to the pancreatic lipase because it is only concerned with the breakdown and digestion of food that was ingested within the body. Unlike the pancreatic lipase that process and weed-out the unnecessary materials that are no longer needed by the body.</span>