Which of the following are biological adaptations that have evolved out of the limitation for organisms to maintain a high surface area to volume ratio in different tissues? A. The need for single-celled organisms to remain small. B. The need for organ systems to be branched, have infoldings, and multiple cells. C. The need for large multicellular organisms to have cells that operate at lower metabolic rates. D. All of the above E. A and B only
Which of the following are biological adaptations that have evolved out of the limitation for organisms to maintain a high surface area to volume ratio in different tissues?
A. The need for single-celled organisms to remain small.
B. The need for organ systems to be branched, have infoldings, and multiple cells.
C. The need for large multicellular organisms to have cells that operate at lower
D. All of the above
E. A and B only
As a cell grows, its volume (units3) increases faster than its surface area (units2), this leads to a decreased surface area:Vol ratio
cells need to perform metabolism in order to survive. in the course of metabolism, raw materials are exchanged for waste products.
If the metabolic rate outweighs the rate of exchange of materials and wastes (low surface area:Vol ratio), the cell will eventually die.
hence growing cells tend to divide and tend to remain small in order to maintain a high surface area:Vol ratio which ensures their survival
most unicellular organisms live autonomously and therefore they do not have to worry about the surface area:Vol ratio as their rate of exchange of materials and wastes can be effectively done
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