Answer: External segments are called metameres and internally, septa, or dividing walls, are located between the segments.
Explanation: I think it is
Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.
Answer: [B]: "proteins" .
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As epithelial makes the outer covering of all the organs and skin is also made of epithelial...so to be sure that it does not get depleted or destroyed due to friction and other external cause ...it should be highly generative !
Decomposers eat dead remains of organisms that are quaternary consumer (no one eats them while alive). So, they break these down and therefore turn into nutrients in the soil for plants to use.
