According to Alfred Russel Wallace, disadvantageous traits are eliminated from the population by natural selection. This is the process of evolution as only the dominant individuals are able to reproduce successfully and their traits passed down generations.
However, today in the advent of improved technology in healthcare, more and more ‘disadvantageous traits’ are being maintained in the population due to advances in medicine that improve the survivability of these individuals – such as people with genetic disease like Parkinson’s.
Answer:
Option (2)
Explanation:
Rocks are the aggregates of minerals are are present on earth since a large geological time. The age of these rocks are usually determined with the help of a technique that is commonly known as the radioactive dating. It is one of the applicable method that is used to calculate the accurate age of a rock depending upon the amount of radioactive isotope that is present in it. There are various methods of dating such as Uranium-Lead dating, Potassium-Argon dating and Carbon dating. These methods are commonly used by the geologists.
Thus, the correct answer is option (2).
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Answer:
Meiosis results in 4 haploid daughter cells with half of the number of chromosomes as the parents cell
