Answer: Options A, B and D.
Explanation: shields are layers of old rocks that metamorphosed as a result of mountain-building events. Shields also have sedimentary layers that usually rest on the lava of the rock.
In case of drastic emergency or fallout if the us were to stand alone it would need supplies it could get on its own
Answer:
Plate tectonics
Plate tectonics is the scientific theory explaining the movement of the earth's crust. It is widely accepted by scientists today. Recall that both continental landmasses and the ocean floor are part of the earth's crust, and that the crust is broken into individual pieces called tectonic plates
Similarities between mitosis and meiosis:
Both mitosis and meiosis are processes of cell division. They use the same steps for cell division, including prophase, metaphase, anaphase and telophase.
Differences between mitosis and meiosis:
Mitosis is the process of asexual reproduction, while meiosis involves sexual reproduction. Higher life forms, such human beings and animals undergo meiosis. The resulting offspring is genetically different in the case of meiosis, while the offspring is identical in the case of mitosis. Meiosis includes two steps of division, compared to the single step of mitosis. During the process of meiosis, the number of chromosomes is reduced by half, while in mitosis, they remain the same. Also, mitosis produces 2 diploid cells, while meiosis produces 4 haploid cells.
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