The First Animals to Show Cephalization Have Several Characteristics

question 22

Multiple Choice

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

• A) These animals were triploblastic.
• B) These animals had a proboscis.
• C) These animals were in phylum Platyhelminthes.
• D) These animals are placed in the group Lophotrochozoa.
• E) These animals followed the protostome pattern of embryonic development.

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Definitions:

Long-Run Equilibrium

A situation in a market where supply equals demand, and all factors of production - including labor and capital - are fully utilized, leading to stable prices.

ATC

Average Total Cost, which represents the total cost per unit of output produced, calculated by dividing the total cost by the quantity produced.

Break-Even Point

The level of production or sales at which total revenues are equal to total costs, resulting in no net loss or gain.

Variable Cost

Costs that vary directly with the level of production or output, such as materials and labor, in contrast to fixed costs which remain constant regardless of output.