3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F. Example: The pulmonary artery carries blood to the lungs (a) If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14. (b) Plant cells have chloroplasts, animal cells do not have chloroplasts. (c) Humans receive oxygen from the air they inhale. (d) Cell membranes let only some molecules pass through. (e) Human chromosomes are found in the nucleus.

Leaving Cert Biology Genetics, DNA & Evolution: 3. Indicate whether the followin

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Question 3

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F. Example: The pulmonary artery carries blood to the lungs (a) If the ... show full transcript

Worked Solution & Example Answer:3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Step 1

(a) If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14.

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Answer

This statement is False. The total magnification is calculated by multiplying the eyepiece and objective magnifications: $10 \times 4 = 40$ , not $14$ .

Step 2

(b) Plant cells have chloroplasts, animal cells do not have chloroplasts.

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Answer

This statement is True. Plant cells contain chloroplasts for photosynthesis, while animal cells lack chloroplasts.

Step 3

(c) Humans receive oxygen from the air they inhale.

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Answer

This statement is True. Humans breathe in oxygen from the atmosphere, which is essential for survival.

Step 4

(d) Cell membranes let only some molecules pass through.

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Answer

This statement is True. Cell membranes are selectively permeable, allowing certain substances to pass while blocking others.

Step 5

(e) Human chromosomes are found in the nucleus.

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Answer

This statement is True. Chromosomes, which contain genetic material, are located within the nucleus of human cells.

3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

Worked Solution & Example Answer:3. Indicate whether the following are true (T) or false (F) by drawing a circle around T or F - Leaving Cert Biology - Question 3 - 2007

(a) If the eyepiece lens of a microscope is marked X10 and the objective lens is marked X4, the total magnification is X14.

(b) Plant cells have chloroplasts, animal cells do not have chloroplasts.

(c) Humans receive oxygen from the air they inhale.

(d) Cell membranes let only some molecules pass through.

(e) Human chromosomes are found in the nucleus.

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