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

question 22

Multiple Choice

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

• A) actinomycin D is part of the normal environment of a sea urchin and serves as a developmental signal molecule
• B) maternal effect genes regulate development until gastrulation
• C) mRNA synthesis is not required after gastrulation
• D) development beyond gastrulation requires actinomycin D
• E) immature sea urchin embryos produce actinomycin D to regulate further development

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Definitions:

Direct Supervisors

Immediate superiors who manage employees on a day-to-day basis, overseeing their work and providing feedback, guidance, and support.

Mum Effect

The tendency to avoid communicating unfavorable news to others due to fear of the negative consequences associated with the disclosure.

Encode

The process of converting ideas and thoughts into a communicable form, such as speech, writing, gestures, or another mode of expression.

Withholding Information

The act of intentionally not sharing or providing relevant information in a workplace or personal context.