Cuticle coating on leaves, and thick epidermal call walls.
A star is a fusion reactor. Under enormous pressure, resulting from gravity, light nuclei of gases such as hydrogen merge to form helium, and since this process releases energy, the start begins to radiate the excess energy. Later on, helium fusion produces heavier elements, and so on.
True, viral STIs are not curable and can only be controlled with medications
As far as I know, only the 3rd step, from all the mentioned above occur during meiosis I.
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