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What if xylem were only located in the roots and stems, would fluids still move? No because xylem have stoma that enables transpiration to happen. If you remove xylem, you've removed that "vacuum" that pulls that water upward
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A swollen earlobe can be red, uncomfortable, and painful. The typical causes of earlobe swelling are infection, allergies, and trauma. While most earlobe injuries can be treated with over-the-counter medications and home remedies, you might want to see your doctor if your symptoms are really severe.Any injury to the earlobe can cause swelling — even an injury as minor as wearing earrings that are too tight. Along with swelling, injured earlobes may be painful and sore.
Explanation:hope this helped
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Our atmosphere (air) is comprised of 78% of nitrogen. However, this nitrogen is in its elementary state (N₂) and therefore is quite inactive, so the plants can not use it directly. Changing the elementary nitrogen into more reactive forms (NH₃, NO₂, HNO₃) is occurring through the process called nitrogen fixation. It is happening via two processes.
First one is physical nitrogen fixation. When some type of atmospheric physical energy (lightning bolt, for example) reacts with N₂, it splits it in two very reactive N atoms, enabling them to react with oxygen in order to form NO₂.
Second process is biological nitrogen fixation. It's done by bacteria, special bacteria living in the soil, able to use elementary nitrogen for its metabolical pathways resulting in production of ammonia, which can be used by plants. It's noteworthy that bacteria are responsible for about 90% of all nitrogen fixation.
phytoplankton falls on the first trophic level which is are "primary producers", it is because even smallest to smallest creatures like zooplankton feed on phytoplankton.
