Some volcanoes have explosive eruptions, like the one at mount st. helens in 1980. eruptions like these can cause abrupt changes to earth's surface. which of these could result from an explosive volcanic eruption? a. part of the volcano is blasted away. b. volcanic ash covers the surrounding area. c. a flow of ash and debris rushes down the volcano's slope. d. all of these

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.