Use the Following Information to Answer the Following Questions

question 90

Multiple Choice

Use the following information to answer the following questions.
In Drosophila after ~100 minutes postfertilization, the embryo looks like the following diagram, with all nuclei having moved to the periphery and, subsequently, four of the nuclei being sequestered at the posterior end.

Drosophila embryo after about 2 hours.
-The next step after the embryo is formed would be

• A) division of the embryo into five broad regions.
• B) use of pair-rule genes to divide the embryo into stripes, each of which will become two segments.
• C) use of zygotic segment polarity genes to divide each segment into anterior and posterior halves.
• D) enclosure of the nuclei in membranes, forming a single layer over the surface.
• E) separation of head, thoracic, and abdominal segments of the embryo.

---

Definitions:

Monopoly Sellers

Single sellers in a market with no close substitutes for the product or service they offer, giving them significant control over prices.

Allocative Inefficiency

A situation where resources are not optimally allocated according to consumer preferences, often leading to overproduction or underproduction of certain goods or services.

Monopolist

An entity that has exclusive control over the supply of a particular good or service, setting prices without facing competition.

Opportunity Cost

The cost of what you have to give up in order to choose something else.