How has technology reduce the spread of infectious disease?

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.