To Meet a Zygote's Metabolic and Developmental Requirements

question 81

Multiple Choice

To meet a zygote's metabolic and developmental requirements,

• A) maternal RNA and maternal proteins must be present.
• B) paternal RNA and maternal proteins must be present.
• C) the haploid DNA in the nucleus must be transcribed.
• D) the nucleus must have hundreds of copies of every gene, allowing a high rate of gene expression.
• E) the zygote must continuously undergo endocytosis of proteins to take them from its environment.

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Definitions:

Diaphragm

A large, dome-shaped muscle located at the base of the lungs that plays a key role in breathing by contracting and expanding the thoracic cavity.

Backflow

The flow of a fluid in a direction opposite to its usual or intended direction, often causing contamination or malfunction in plumbing or in bodily systems.

Valves

Structures present in the heart and veins that maintain unidirectional flow of blood by opening and closing in response to pressure differences.

Venous Valves

Structures within veins that prevent the backward flow of blood, crucial for blood returning to the heart.