In an Organism Such as a Sea Urchin, Administration of Actinomycin

question 15

Multiple Choice

In an organism such as a sea urchin, administration of actinomycin D prevents RNA synthesis. However, early development up to gastrula formation can take place in the presence of actinomycin D but gastrulation cannot. This implies that __________.

• A)development beyond gastrulation requires actD
• B)actD is part of the normal environment of a sea urchin and serves as a developmental signal molecule
• C)actD receptors begin to form only on cell surfaces of the gastrula
• D)maternal effect genes regulate development until gastrulation
• E)immature sea urchin embryos produce actD to regulate further development

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Definitions:

Elasticity of the Demand

A measure of how the quantity demanded of a good responds to a change in its price.

Technological Changes

Innovations or improvements in technology that enhance productivity, efficiency, or quality in the production of goods and services.

Monopoly Power

The exclusive control or possession of the supply or trade in a commodity or service, often eliminating competition.

Elastic

Describes a market condition where the quantity demanded or supplied of a good or service is sensitive to changes in its price.