A Sediment Core Is Removed from the Floor of an Inland

question 32

Multiple Choice

A sediment core is removed from the floor of an inland sea. The sea has been in existence, off and on, throughout the entire time that terrestrial life has existed. Researchers wish to locate and study the terrestrial organisms fossilised in this core. The core is illustrated as a vertical column, with the top of the column representing the most recent strata and the bottom representing the time when land was first colonised by life.
If arrows indicate locations in the column where fossils of a particular type (see key) first appear, then which core in the figure above has the most accurate arrangement of fossils?

• A) core A
• B) core B
• C) core C
• D) core D

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Definitions:

Average Variable Cost

The total variable costs divided by the quantity of output produced, reflecting the cost for each unit excluding fixed costs.

MP

Short for Marginal Product, which is the additional output resulting from using one more unit of a particular input, holding other inputs constant.

MC

Marginal Cost, the change in total production cost that comes from making or producing one additional unit.

AP

Advanced Placement, a program offering college-level curriculum and examinations to high school students in various subjects.