The cell is in a hypertonic solution. Because there are more solutes outside the cell, the water will flow outside the cell in order to restore equilibrium.
PCR (polymerase chain reaction) is a relatively new advance (1980's) but it has a great impact in our lives. Specifically, in forensic science, PCR is useful in many sorts of crimes . Up until the PCR method, in order to identify a person forensic scientists would use fingerprints or some other ambiguous methods like teeth marks etc. But now, with PCR, we can compare the genetic material found on a crime scene and compare it with a suspect's genetic material, definitively concluding whether they are the same person or not. The way this works is that we collect a sample from the crime scene with DNA and then PCR amplifies the quantity of DNA in that sample. One of the apparent advantages of this method is that PCR works with even a very small sample, often not even a single cell is required. This makes crime scenes full of information. Hence, succinctly, PCR has helped modern forensic science in that:
1) its results are more definitve than traditional identification methods and subject to less ambiguity
2) it is relatively fast
3) new pieces of evidence can be of value (like some hair cells) and identify the crominal in cases that in older times would be impossible to solve.
Answer:
It is biodiversity, I think. Not sure, though.
Answer:
D) the soil components remained for plants to grow.
Explanation:
The soil components that is remained after the removal of the forest provides a nutritive medium for the faster growth of plants. The faster rate of secondary secession occurs due to the presence of nutrients in the soil which ultimately increases the growth of the plants. The soil components has roots, seeds and other biotic organisms of the previous plants that is decomposed by the decomposers and provides nutrients to the plants.
