Complete the following sentences that describe evidence found in the k-t boundary layer.
[shocked quartz, meteorites, iridium, soot, solidified rock "droplets", dust, chicxulub]
the presence of suggests an impact because these mineral grains form only under high-pressure conditions.
the presence of is thought to indicate that rock splashed upward by an impact was molten as it fell back down from the sky.
the unusually high abundance of in this layer suggests that this material came from the impact of an asteroid (or comet).
the presence of that there were world-wide forest fires at the time this layer formed.

The interaction of individual choices because a type of fish is on the verge of extinction, the government imposes rules that prohibit fishing in the publicly owned spawning grounds. at first owners of fshing bouts complain about this restriction on where they can fish, but soon they notice that the number of adult fish swimming outside the protected area is much higher than it was before. with the restriction, each fishing boat ends up catching more fish than it did before the r which of the following principles of economic interaction best describes this scenario? o there is a tradeoff between equality and efficiency o markets usually lead to efficiency. o when markets do not achieve efficiency,government intervention can improve overall welfare o markets allocate goodseffectively