A control group is different because it is not what is being tested. for example the control group would use sugar pills while the other group uses the pills being tested
<span>The </span>function of the valves<span> in the peripheral </span>veins<span> is to ensure that the overall movement of blood in the </span>veins<span> is in the right direction, toward the heart. This is especially important in the </span>legs<span>, where the blood must flow a relatively long distance against gravity. </span>
Answer:
Trees absorb carbon dioxide (CO2) during photosynthesis, in which they use sunlight to convert that CO2 into the sugars and energy they need to grow. ... Planting trees could therefore help mitigate climate breakdown, since they absorb CO2 as they grow, and the carbon remains stored until the wood decomposes or is burnt.
