It can be inferred from the passage that Martin’s hypothesis includes which of the following elements?
When marine organisms called phytoplankton photosynthesize, they absorb carbon dioxide dissolved in seawater, potentially causing a reduction in the concentration of atmospheric carbon dioxide, a gas that contributes to global warming. However, phytoplankton flourish only in surface waters where iron levels are sufficiently high. Martin therefore hypothesized that adding iron to iron-poor regions of the ocean could help alleviate global warming. While experiments subsequently confirmed that such a procedure increases phytoplankton growth, field tests have shown that such growth does not significantly lower atmospheric carbon dioxide. When phytoplankton utilize carbon dioxide for photosynthesis, the carbon becomes a building block for organic matter, but the carbon leaks back into the atmosphere when predators consume the phytoplankton and respire carbon dioxide.A correct understanding of how phytoplankton photosynthesis utilizes carbon dioxide, A correct prediction about how the addition of iron to iron-poor waters would affect phytoplankton growth, An incorrect prediction about how phytoplankton growth would affect the concentration of atmospheric carbon dioxide
Add Your Explanation
You must have a Magoosh account in order to leave an explanation.