Doctors have not identified a specific cause or result but they think that there are risk factors like:
- advancing age
- family history
-umheathly life style choices
- taking certain medicine
and just in case you did not know what osteoporosis is it is a common disease that weaken the bone and as they weaken you have a higher risk of unexpected fractures
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
Melting and crystallization
Intrusive slow igneous fast
Limestone mudstone
It weathers
They need to be buried and cemented
Yes over time and through the cycle
Lava extreme heating
Granite
Basalt
Marble slate
<span>A major reason for Herbert Hoover’s landslide victory in the 1928 election was the prosperity of the 1920's. In the early 1920's there was a large economic boom and Herbert Hoover pledged to continue that. </span>
Hi
<em>By molecular clock, it is referred to the alterations that take place in the small sequences of DNA and which with the passage of time cause organisms to evolve from one to many.</em>
In actual, the main cause of evolution in living organisms is the changes in DNA sequence of organisms, called mutations. Mutations serve as molecular clocks and today, scientists use these mutations to track back changes that took place in the organism over the course of time and to find the appropriate ancestor of organisms.
If we talk specifically about silent mutations, they are mutations that donot depict a great changing in the phenotype of organism or cause physiological abnormalities like diseases. They stay without causing any effect or harm to organisms.
However, these silent mutations if transferred to offspring during reproduction can have a substantial affect after many generation when this mutation will manifest itself. It is because this mutation can affect in combination over some other gene and cause significant effect on organism. This effect can be either harmful or dangerous. Here the organism who will be better able to adapt this mutation will survive as per the principle of natural selection and these selected organism with the passage of time can develop into entirely new specie.
<em>This is how it works mutations work as molecular clocks and can be used to trace the ancestry of organisms.</em>
Hope it help!
