The are opposite processes. Photosynthesis requires carbon dioxide, water and sunlight to create oxygen and glucose. Where cellular respiration requires oxygen and glucose to create ATP energy, and carbon dioxide and water as waste products. Since the processes are opposite of each other they are in a never ending cycle. One provides the other with the necessary reactants to create the products
D) carries oxygen in the blood
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When you first fall in love, you experience a rush of hormones to the brain — including oxytocin, the “love hormone,” the “pleasure hormone” dopamine, and sex hormones like estrogen and testosterone. ... This influx of hormones plays a major role in those intense feelings of fluttery excitement, attraction and euphoria.
Organic matter in soil is called humus.
Hydrogen and oxygen are often found in the form of H2O but even if hydrogen surpasses oxygène in number it doesn't when it comes to mass because M(O) = approximately x16 M(H)