Podcast
Questions and Answers
In which environment would you expect a protist's contractile vacuole to be most active?
In which environment would you expect a protist's contractile vacuole to be most active?
- Neutral environment
- Hypotonic environment
- Hypertonic environment (correct)
- Isotonic environment
Why do protists with cell walls not have contractile vacuoles?
Why do protists with cell walls not have contractile vacuoles?
- Cell walls actively pump out excess water, bypassing the need for vacuoles
- Cell walls provide structural support, eliminating the need for vacuoles
- Cell walls maintain osmotic balance, making vacuoles redundant
- Cell walls prevent water from entering, reducing the need for vacuoles (correct)
If a plant cell changes the osmolarity of its central vacuole, lowering its water potential, what will happen to the vacuole?
If a plant cell changes the osmolarity of its central vacuole, lowering its water potential, what will happen to the vacuole?
- Gain water (correct)
- Explode
- Maintain water level
- Lose water
How would a cell lower its water potential?
How would a cell lower its water potential?
Why would a cell want to lower the water potential of its vacuole?
Why would a cell want to lower the water potential of its vacuole?
Which of these beakers has the lowest solute potential?
Which of these beakers has the lowest solute potential?
In which direction does water move by osmosis?
In which direction does water move by osmosis?
What effect does a hypertonic solution have on a red blood cell?
What effect does a hypertonic solution have on a red blood cell?
Where does water move in a hypotonic solution in relation to a cell's internal environment?
Where does water move in a hypotonic solution in relation to a cell's internal environment?
Which cellular organelle in plant cells is involved in maintaining turgor pressure and regulating water content?
Which cellular organelle in plant cells is involved in maintaining turgor pressure and regulating water content?
What happens to a red blood cell placed in an isotonic solution?
What happens to a red blood cell placed in an isotonic solution?
How does a hypotonic external environment compare to a cell's internal environment in terms of water potential?
How does a hypotonic external environment compare to a cell's internal environment in terms of water potential?
Which organelles in a plant cell are believed to have once been free-living prokaryotes?
Which organelles in a plant cell are believed to have once been free-living prokaryotes?
What is the main process by which mitochondria and chloroplasts would have lived on their own?
What is the main process by which mitochondria and chloroplasts would have lived on their own?
What is the relationship between endosymbiotic organelles and their free-living ancestral counterparts?
What is the relationship between endosymbiotic organelles and their free-living ancestral counterparts?
Which of the following is NOT a piece of evidence that supports the Endosymbiotic theory?
Which of the following is NOT a piece of evidence that supports the Endosymbiotic theory?
What do mitochondria primarily provide to the cell?
What do mitochondria primarily provide to the cell?
Which cellular process involves the movement of water across cell membranes to maintain cell volume?
Which cellular process involves the movement of water across cell membranes to maintain cell volume?
