The answer is true. Of all the numerous ways research can be directed, the best quality level of evidence where medications and treatments are concerned is the Randomized Controlled Trial. A Randomized Controlled Trial is a test or study directed such that whatever number wellsprings of predisposition as could reasonably be expected are expelled from the procedure.
Muscle cells would contain a high number of B. Mitochondria, as they constantly because they aid in moving the organism's limbs, etc, they constantly need to undergo cellular respiration to obtain the energy they need for their functions.
One of the many things plants do is produce oxygen through photosynthesis (which we use all the time)
Weathering and erosion .. as weathering occurs breaking up the rock it can be transported through erosion .there are two categories of weathering processes: physical and chemical . although they are two very different processes that work together to break down rocks and minerals.