The answer is Speciation cannot occur in the absence of mutation. Speciation cannot occur in the absence of natural selection
They either frow on other organisms and get there food or they eat it feom a dead animal
Answer:
Testing positive for HIV means a high chance of death and a good chance of lower reproduction rates. But some people are immune to HIV, which makes them more evolutionarily fit, likely to live longer, likely to reproduce more, which would increase the frequency of the immune allele in the population. Over time, this increase in frequency of the gene that causes immunity could spread across the human race and cause it to evolve.
