Answer:
the biological levels of organization of living things arranged from the simplest to most complex are organelle , cells , tissues , organs , organ system , organism , population , communities , ecosystem , and biosphere....
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Answer:
carbon group
All the carbon group atoms, having four valence electrons, form covalent bonds with nonmetal atoms; carbon and silicon cannot lose or gain electrons to form free ions, whereas germanium, tin, and lead do form metallic ions but only with two positive charges.
Answer:
when it gets so dense and heavy it implodes, and creates a black hole
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Answer:
To avoid variation due to concentration
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