Question

question 10
a list of the cell fibers from largest to smallest would read:
microtubules, intermediate filaments, microfilaments.
microtubules, microfilaments, intermediate filaments.
microfilaments, intermediate filaments, microtubules.
microfilaments, microtubules, intermediate filaments.
question 11
a specialized cell structure that propels the sperm is the:
flagellum.
cilium.
microvillus.
microtubule.
question 12
which organelle processes and packages material to be secreted?
nucleolus
ribosome
mitochondrion
golgi apparatus

Explanation:

• Question 10: Microtubules are the thickest (about 25 nm in diameter), intermediate filaments are of intermediate size (8 - 12 nm), and microfilaments are the thinnest (about 7 nm).
• Question 11: The flagellum is the specialized structure that propels sperm. Cilia are shorter and more numerous in other cell - types for movement of substances along cell surfaces. Microvilli are for increasing surface area for absorption. Microtubules are part of the cytoskeleton but not the main propelling structure for sperm.
• Question 12: The Golgi apparatus modifies, processes, and packages materials for secretion. The nucleolus is involved in ribosome synthesis, ribosomes are for protein synthesis, and mitochondria are the power - houses of the cell for ATP production.

Answer:

Question 10: microtubules, intermediate filaments, microfilaments.
Question 11: flagellum.
Question 12: Golgi apparatus