How could physical changes to earth such as a meteor impact, an ice age, or global warming lead to physical changes in organisms?

In the developed world, describe the changing role of women in agriculture.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market