Speciation, when populations evolve to become distinct species
Roundworms or nematodes<span> constitute the phylum Nematoda. They are a diverse </span>animal phylum inhabiting a broad range of environments. The most essential representative for this group is the <span>Bursaphelenchus xylophilus. Hope this answers your question. Have a great day!</span>
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Particles or molecules that are too big to fit through regular pores in the cell membrane, or have to big an electric charge, against the current of passive transport ( lower to higher ).
