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The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.
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these biomes has permanently frozen water in its soil is a tundra.
The best and most correct answer among the choices provided by your question is the first choice or letter A. <span>A biological agent that cannot reproduce on its own is a VIRUS.
</span>A virus<span> is a small infectious agent that replicates only inside the living cells of other organisms.
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Thermal energy causes matter to change state beacuse evrything has heat which is thermal energy hore heat is more thermal energy.
Ex.Ice changes into water
Ex.Water changes into water vapor
How can reproductive isolation lead to speciation<span>? If populations cannot mate successfully with one another, genetic differences may accumulate in the populations. Over time they become very different and give rise to new species.</span>
