Why can even low levels of a toxin have serious effects, if the toxin doesn't break down easily, like mercury?

Read the sentence. “yesterday we arrived late for the outdoor concert in the city gardens.” which words in the sentence are adverbs? a. late; city b. yesterday; outdoor c. yesterday; late d. outdoor; city

Aperson is outside exercising. body temperature begins to rise, and the person starts to sweat. their body temperature then returns to normal, and the body stops sweating. a positive b negative c allosteric d homeopathic

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates