Fruit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. what can you infer is the reason fruit flies are the most commonly used organism for this type of investigation? a. fruit flies are relatively inexpensive b. society does not have ethical issues with lab-kept flies c. many more generations can be studied using short-lived organisms
d. scientists prefer to study what has previously been studied

Aspecies has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. which of the following will be true of this species' response to natural selection? there will be more deaths from natural selection because there is no mutation. there will be less genetic variation from recombination and a risk of not adapting quickly to environmental change. the species will increase in numbers because genetic variation is increased. the species will compensate for loss of genetic variation by hybridizing with other species. there will be fewer deaths from natural selection because sexual recombination always leads to extinction.