F1 stands for first filial (daughter) generation
<span>F2 stands for second filial (daughter) generation</span>
<span>Active and passive transport help to maintain homeostasis because they transport fluid/water/materials across the plasma lemma (cell membrane). All of these materials need to exist in certain ratios for the cell to function properly. </span>
<span>B. more energy than radio waves and microwaves.</span><span>
Hope this helps!
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The answer would most likely be sodium because carbon is a plants food, phosphorus is a nutrient in soil, hydrogen is air, but sodium does not have a place in a plant:)
