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What are the adaptations of alveoli to increase gas exchange?

Alveoli are folded to increase their surface area to volume ratio, so more volume of air can diffuse in from the blood and and in from the bronchioles. The lining of the alveoli walls are also moist so the g...
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Answered by Lathesha B. • Biology tutor
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What does: "No me gusta el cerdo, pero sí la ternera" mean?

I dislike pork meat, but I like beef.
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Answered by Clara M. • Spanish tutor
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What does: "Marta tiene el pelo moreno" mean?

Marta has brunette hair.
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Answered by Clara M. • Spanish tutor
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Find the first derivative of the line equation y=x^3 + 4

dy/dx = 3x^2
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Answered by Harry F. • Maths tutor
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What is meant by the independent and dependent variables? Please give one example of each.

Independent variable: the one that you change. Dependent variable: the one that you measure. For example, a scientist wants to find out whether a diet including oats makes a horse run faster, so she adds oat...
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Answered by Lauren P. • Biology tutor
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