Drastic changes in environmental conditions can sometimes cause drastic changes to the gene pool of the population.
Answer:
Explanation:
RNA is single-stranded, not double-stranded: Unlike Dna polymerases, RNA polymerases are able to join RNA nucleotides together without requiring preexisting strand of RNA.
Answer:
The correct answer is C.
Explanation: If a document for example has bleed, it means that it has to be printed on a large sheet of paper and then it has to be trimmed down.
There have been 5 mass extinctions in the history of Earth, the main two are the K-T extinction (75% of the world organisms were killed) and the great paleozoic extinction. Scientists believe a massive meteorite caused the KT extinction but could also have been caused by some traps in India. The paleozoic extinction was believed to be caused by traps in Siberia which effected the temperature and atmospheric conditions of the tune