The _______ is a cell structure with an internal cross section showing a characteristic "9 + 2" morphology.
A) mitochondrion
B) vacuole
C) Golgi apparatus
D) cilium
E) cytoskeleton

Question

Quizplus · Accepted Answer

The internal cross section of a cilium shows the characteristic "9 + 2" morphology, which refers to a ring of nine paired microtubules surrounding a central pair of microtubules. None of the other structures listed have this specific morphology. The mitochondrion and Golgi apparatus are both organelles that have distinctive shapes and functions but do not have a "9 + 2" structure. The vacuole is a membrane-bound organelle that primarily functions in storage and degradation but also does not have a "9 + 2" structure. The cytoskeleton is a network of protein filaments that provides structural support and facilitates intracellular transport but is not a single identifiable structure with a specific morphology.

The _______ Is a Cell Structure with an Internal Cross