The Following Questions Are Based on the Description Below

question 54

Multiple Choice

The following questions are based on the description below.
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage) .
-If a multicellular animal lacks True tissues, then it can properly be included among the

• A)eumetazoans.
• B)metazoans.
• C)choanoflagellates.
• D)lophotrochozoans.
• E)bilateria.

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Definitions:

MSB and MSC

Marginal Social Benefit (MSB) and Marginal Social Cost (MSC) refer to the additional benefit or cost to society of producing one more unit of a good or service.

Pollution

The introduction of contaminants into the natural environment, causing adverse changes and harm to ecosystems and human health.

Market Economy

A market mechanism where investment, production, and distribution decisions are informed by supply and demand forces, with the prices of goods and services set within an open pricing system.

Without Government

A scenario that describes a situation or theoretical condition where governmental institutions and interventions do not exist or are absent.