It is a true or false question please help!

Consider the example of sickle-cell anemia and the allele for the sickle-cell trait, and answer questions 1-3.

1. Eventually, natural selection will typically result in the sickle-cell allele being fixed in the population . .

2. Selection at this locus is an example of disruptive selection .

3. Hypothetically, if homozygous recessives had the highest fitness (i. e. selection was directional) of the three genotypes discussed in the text, then natural selection would lead to fixation of the sickle-cell allele .

4. If evolution occurs in a population, then the allele frequencies in that population must have been changed .

5. Fermentation yields an equivalent amount of energy as respiration because both processes achieve full oxidation of carbon compounds to CO2 . 6. Natural selection is not involved in adaptive radiation .