Indicate whether the following statements are true or false by drawing a circle around T or F in each case - Leaving Cert Biology - Question 3 - 2016
Question 3
Indicate whether the following statements are true or false by drawing a circle around T or F in each case.
(a) Diffusion is the movement of molecules from where th... show full transcript
Worked Solution & Example Answer:Indicate whether the following statements are true or false by drawing a circle around T or F in each case - Leaving Cert Biology - Question 3 - 2016
Step 1
(a) Diffusion is the movement of molecules from where they are more concentrated to where they are less concentrated.
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Answer
True. This statement accurately describes diffusion, which is the net movement of molecules from an area of higher concentration to an area of lower concentration.
Step 2
(b) Semi-permeable means all substances can pass through.
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False. Semi-permeable membranes allow only certain substances to pass through while blocking others, not all substances.
Step 3
(c) Turgor pressure helps to give shape to plant cells.
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True. Turgor pressure, created by the pressure of water within the cell, is essential for maintaining the structural integrity of plant cells.
Step 4
(d) Osmosis is the basis for some methods of food preservation.
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True. Osmosis can be used in food preservation by drawing water out of food items, thus inhibiting microbial growth.
Step 5
(e) Energy is required for diffusion to happen.
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False. Diffusion is a passive process, meaning it does not require energy; substances move according to their concentration gradient.
Step 6
(f) Osmosis concerns the movement of water.
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True. Osmosis specifically refers to the movement of water molecules through a semi-permeable membrane.
Step 7
(g) Oxygen passes from our lungs to our blood by osmosis.
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Answer
False. The transfer of oxygen from the lungs to the blood occurs via diffusion, not osmosis.
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