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 Breathing System: Indicate whether the following a

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

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 eye... show full transcript

Worked Solution & Example Answer: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 magnification by the objective lens magnification. Therefore, it would be $10 \times 4 = 40$ .

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 do not have this organelle.

Step 3

(c) Humans receive oxygen from the air they inhale

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Answer

This statement is True. Humans inhale air, which contains oxygen, necessary for cellular respiration.

Step 4

(d) Cell membranes let only some molecules pass through

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Answer

This statement is True. Cell membranes are semi-permeable, allowing certain molecules to pass while restricting others.

Step 5

(e) Human chromosomes are found in the nucleus

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Answer

This statement is True. Human chromosomes, which carry genetic information, are located within the nucleus of the cell.

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: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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