Answer:
Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide. Prokaryotes often have appendages (protrusions) on their surface.
Answer:
C. Metalloid
Explanation:
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Answer: Mutualism is a relationship of two organisms wherein both organisms benefit from each other. ... Commensalism is a relationship of two organisms wherein one organism benefit from the other with neither harm nor benefit to the other
Epithelial tissue covers the body, lins internal surfaces, and forms glands.
Answer:
Ionizing radiation comes from these main sources:
Nuclear reactions in the Earth's sun and stars in space.
Radioactive decay in the body's tissues and in the soil.
Radioactive decay of unstable elements in rocks, especially rocks that contain radium and release radon gas.
Other examples of ionizing radiation include alpha, beta, and gamma rays from radioactive decay.
