what is the importance of DNA replication? why is variation is beneficial to the species? explain with suitable example
Answers
1. DNA replication is the biological procedure of creating two indistinguishable replicas of DNA from one innovative DNA molecule. This procedure occurs in all livelihood organisms and is the foundation for biological legacy. DNA is complete up of a double helix of two balancing strands.
DNA replication is important since it creates a next copy of DNA that have to go into one of the two daughter cells when a cell divides. Without replication, each cell lacks adequate hereditary fabric to give instructions for creating proteins vital for bodily purpose.
2. Variation is important for any species because it allows the species to adapt to a changing environment.
Also, the presence of diseases and parasites maintains variation in a species, particularly those associated with blood groups.
The first response of a species confronted with environmental changes, such as climate change, is to shift its range[1][2]. So a species could move poleward, or to higher altitudes. When that does not work variations help individuals survive in harsher conditions, and adapt to the changes.
A problem at present is that global warming is happening fast and many species have already been reduced to smaller populations. This reduces the available variation, making the species less adaptable. This can also happen if the range gets broken up, and individuals in one area can no longer breed with those in another[3].
The variations that help resist parasites persist in a population[4]. Say most individuals are vulnerable to a particular parasite, but there is a small number resistant to it. These individuals have an advantage and increase in numbers until they are enough to keep the parasite from spreading. This will allow vulnerable individuals to avoid infection and survive. When the parasite adapts to the resistant strain, they often loose the ability to infect some other strain, and so it goes.
Answer:
The reason why the variation is beneficial to the species than individuals is because sometimes the climatic changes have a drastic effect on the species which makes their survival difficult. For examples, if the temperature of the water body increases, then are might be certain species of microorganisms which might die. This may result in disturbance in the environment. So, variation is beneficial to species and not for the individuals.