hehe, thanks sammie. I sure do hope so, though my doubt seems to far exceed yours on that matter.

had me maths exam today. Meh. It's the one i least care about, but i have a feeling it's going to be better than the others. For the others, you really have to THINK you know? It's not simply applying rules.

Well. What shall it be today? Gas exchange in a plant? Classifications? Surface Area to Volume Ratio? ho hum. I shall do a hodge-podge study today. I really should exand out of biology to something else...but MEH. biology is next...i'll leave the other til, say, a night before i have 'em.

SURFACE AREA TO VOLUME RATIO

Surface area determines how efficient a cell is at exchanging materials with their environment. As cell size increases, SA:V ratio decreases, as diffusion cannot adequately supply the entire cell, thus the cell becomes inefficient at exchanging materials between their environment. Thus, single-celled organisms are restricted in size, because they obtain nutrients mainly though diffusion.

Surface area to volume ratio is also important in gas exchange in multicellular organisms. Gas exchange surfaces (such as the alveoli in lungs and the lamella in gills) are extremely large, increasing the rate of diffusion. Many aquatic creatures have adapations (oooh, sorry mr forma, almost said 'adaptions') or extensions which increase their surface area. This is due to the low concentrations of oxygen in water; and therefore they need to take measures to adequately meet requirements.

by god, i keep using the same words. "thus", "requirements" "surface area" "efficient". EXPAND, KATE EXPAND!! BREAK FREEEEEE!!!

haha.

ok. i'm bored. so much for that. sigh.

QUOTES OF THE DAY:

La Rochefoucauld: "We can forgive those who bore us. We cannot forgive those whom we bore."

Voltaire: "Le sens commun n'est pas si commun." [= "Common sense is not so common."]