A Characteristic 9 + 2 Arrangement of Microtubules, Consisting of Nine

question 31

Multiple Choice

A characteristic 9 + 2 arrangement of microtubules, consisting of nine doublet microtubules surrounding a pair of single microtubules describes the ultrastructure of which of the following cellular structures?

• A) bacterial flagella
• B) eukaryotic flagella and motile cilia
• C) eukaryotic flagella, motile cilia, and nonmotile cilia
• D) centrioles and basal bodies

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Definitions:

Nutrient Exchange

The transfer of nutrients from the mother to the fetus during pregnancy, essential for fetal development.

Ovum

A mature female reproductive cell, especially of a human or other animal, which can fuse with a male gamete in sexual reproduction.

Sperm

Male reproductive cells or gametes involved in sexual reproduction, which can fertilize female gametes (ova) to produce offspring.

Embryonic Period

Occurs from about 2 to 8 weeks after pregnancy, in which rapid structural development takes place.