Question

question 16
which of the following do not play a role in intracellular movement?
only intermediate filaments
microfilaments and intermediate filaments
microfilaments and microtubules
intermediate filaments and microtubules
microtubules only

question 17
in humans, __ are used to move a cell within its environment while __ are used to move the environment relative to the cell.
microfilaments; microtubules
microtubules; flagella
microtubules; intermediate filaments
cilia, pseudopodia
flagella; cilia

question 18
which of the following are only in plant cells?
gap junctions
mitochondrion
desmosomes
plasmodesmata
tight junctions

Explanation:

• Question 16: Microfilaments and microtubules are involved in intracellular movement. Intermediate filaments mainly provide structural support and do not play a direct role in intracellular movement.
• Question 17: Flagella are used to move a cell within its environment, and cilia can move the environment relative to the cell.
• Question 18: Plasmodesmata are cell - to - cell communication channels found only in plant cells. Gap junctions are in animal cells, mitochondria are in both plant and animal cells, desmosomes are in animal cells, and tight junctions are in animal cells.

Answer:

Question 16: only intermediate filaments
Question 17: flagella; cilia
Question 18: plasmodesmata