Under natural conditions, which of the following may cause allele frequencies to change? a. limited resources, which could cause one allele to have an advantage b. a random assortment of alleles during sexual reproduction c. no emigration from the population d. no immigration into the population

The answer is A. Limited resources will result in stiff competition among individuals in the population. This will result in differential survival across the population because only the individuals that are able to outcompete the others will be able to reproduce and pass their genes to the next generation. This, therefore, will change the allelic frequency of the population.

B] nitrogen fixationmight be wrong, so correct me.want extra on your answers? just go on my account and go on questions and answer, or ask in the comments!