<span>True.
Earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. This reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. These are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.</span>
Delayed phase preference.
Its when teenagers begin to stay up later on average about 2 hours later. It is initially caused by melatonin; its a chemical that makes us sleepy but in teenage melatonin levels rise about 2 hours later than in pre-teens, so teenagers do not get sleepy. When combined with stimulus to stay awake tv, texting or surfing the web or whatever teenagers go to bed much later.
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
