Which event happened first in earth’s evolution on the geologic time scale? energy from collisions melted materials that became earth’s core. the sun released a strong burst that destroyed the first atmosphere. a ball of dust, ice, and rock was pulled together by gravity. dense materials hardened to form the crust and mantle.

Pl which diagram illustrates prophase?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called