In the pleistocene period 10,000 years ago, there was a remarkable extinction of vertebrates in many continents, which may explain why the cheetah has famously low levels of genetic variation. which evolutionary mechanism does this reflect? natural selection bottleneck effect founder principle nextreset

The correct answer is bottleneck effect.

Explanation:

An ecosystem can change dramatically when a disaster strikes. When an event leads to a dramatic reduction in a population, it can result in a kind of genetic drift known as a bottleneck effect. A bottleneck effect can be a result of a natural calamity like a volcanic eruption or an earthquake.  

When the majority of the individuals in a population die unexpectedly, genetic variation reduces and the frequencies at which distinct alleles are witnessed in the population can modify drastically. The individuals that survive were lucky as they didn't do much to survive, it was just a matter of a chance.  

The surviving members do not completely demonstrate the original population, they actually under-represent or over-represent the alleles of the original population. Thus, the given case is an illustration of the bottleneck effect.  

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

when it is at an intermediate population density