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Precambrian. Precambrian Oldest and longest era of Earth's history, lasting from the formation of the Earth c.4.6 billion years ago<span> to the beginning of a good fossil record c.</span>590 million years ago<span>.</span>
The double membrane. It's theorized that chloroplasts used to be their own single-celled organism in the environment (and therefore with its own membrane). Then, the theory states, a larger cell took in the chloroplast by endocytosis, which involves surrounding the chloroplast in the large cell's own membrane. The chloroplast would then have two membranes surrounding it. This is similar to the thinking for mitochondria becoming an organelle as well. Hope this helps! :)
<span>The benefit does an adult dog gain from being petted with long, smooth strokes is petting will reduce the stress of the adult dog.Dog's life is similar to human's life even though human has so many problems when they see the child they will forget all the things.Likewise,dog also if they see the pets their stress will reduce surely.So D option is suitable for this question.</span>
The location and types of volcanoes are related to plate tectonics as well, so in that sense volcanoes also help us to understand about the tectonic history of a region because if there are volcanoes someplace even if they're not currently active we know that that must have been some sort of a plate uwu
