Propose Reasons Why Major Extinction Events (Or Explosions of Life-Forms)are

question 16

Essay

Propose reasons why major extinction events (or explosions of life-forms)are good dividing lines for the geologic timescale.Support your answer.

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Definitions:

Fishery

An area with a naturally occurring population of aquatic species which can be harvested for economic purposes.

Marine Animal

An animal that inhabits the ocean or other marine environments.

User Cost

The economic cost of using a resource today, which considers the lost opportunity of using it in the future.

Energy

The capacity to do work, manifested in physical forms such as heat, light, motion, and chemical energy, crucial to all aspects of life and industry.