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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Answer:
Religiously, yes; nationally, no.
Explanation:
Not all religions and beliefs have St. Louis, so there would be a sort of feast day in the particular religion St. Louis is regarded a saint.
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<span>The trait that is ancestral to all chordates is the presence of a notochord...the others are gill slits and nerve chord</span>
Passive because the water flow gets weaker mark brainliest please and have a good day
Organ systems is the answer
