Why have most multicellular organisms evolved structural adaptations which maximize gas diffusion from the environment?Multiple choice question.Because direct diffusion of oxygen into each cell normally takes over 0.5 minutes.Because direct diffusion of oxygen into each cell can provide enough oxygen only if the diffusion distance is more than 0.5 mmBecause direct diffusion of oxygen into each cell can provide enough oxygen only over distances under 0.5 mm.
Question
Why have most multicellular organisms evolved structural adaptations which maximize gas diffusion from the environment?Multiple choice question.Because direct diffusion of oxygen into each cell normally takes over 0.5 minutes.Because direct diffusion of oxygen into each cell can provide enough oxygen only if the diffusion distance is more than 0.5 mmBecause direct diffusion of oxygen into each cell can provide enough oxygen only over distances under 0.5 mm.
Solution
The correct answer is: "Because direct diffusion of oxygen into each cell can provide enough oxygen only over distances under 0.5 mm."
This is because diffusion is a slow process and is only efficient over small distances. In multicellular organisms, many cells are located far from the external environment and thus direct diffusion of oxygen from the environment to each cell is not sufficient. Therefore, these organisms have evolved structural adaptations, such as circulatory systems and lungs in animals or vascular tissues in plants, to maximize gas diffusion and ensure that all cells receive the necessary oxygen.
Similar Questions
Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans ?
What limits the size of organisms that rely entirely on oxygen diffusion from the environment (and not on a transportation/exchange system of any kind)?Multiple choice question.The fact that those organisms don't have hemoglobinThe rate of oxygen diffusionThe fact that for every molecule of oxygen that comes in hundreds of CO2 molecules are producedThe thickness of the plasma membrane
By creating a water current that continuously replenishes water over the respiratory surfaces, many invertebrates that lack specialized respiratory organs increase the diffusion of oxygen byMultiple choice question.maximizing the surface area for diffusion.maximizing Δp in Fick's law.decreasing the distance over which gases travel.reducing the Δp in Fick's law.
1 Assertion (A): Diffusion does not meet high energy requirements of multi-cellular organismsReason (R) : Diffusion is a fast process but occurs at the surface of the body.
Multiple Choice QuestionSmall cells maintain more efficient transport systems becauseMultiple choice question.small cell size minimizes the ability of diffusion and motor proteins to transport nutrients and waste products.diffusion over large distances is slow and inefficient.diffusion over large distances is quick and efficient.
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