Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
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Through natural selection, those organisms which have better adaptations to survive in an environment are able to live and pass on their alleles to their offsprings. Hence, any trait which is beneficial to an organism will be favoured by natural selection.
As tissue pockets is a trait which is required by the shrimps, hence with the passage of time shrimp population having tissue pockets will increase and will be favoured by nature.
The most popular injectable augmentation product is a hyaluronic acid-based filler because it is more effective and safe than other injection fillers. Although the problem of infected filler is well established, it is unclear how long the filler will last before being absorbed. A case of hyaluronic acid-based filler-exacerbated facial cellulitis that occurred 2.5 years after filler administration was presented.
<h3>What are Injectable filler ?</h3>
Injectable filler is a soft tissue filler that can be injected into the skin at various depths to smooth out facial wrinkles, add volume to the face, and enhance facial characteristics.
- When it comes to filling up wrinkles, creases, and sagging skin, hyaluronic acid fillers are a fantastic alternative. The procedure is not overly intrusive, the results show up right away, and it takes six to 18 months to complete.
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Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
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