Bacteria were first observed by the Dutch microscopist Antonie van Leeuwenhoek in 1676
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Answer:
mRNA
Explanation:
did this yesterday hope this helps!
Answer:
Dosage and form in which the chemical is present are the factors that determine the level of harm of chemical on the environment.
Explanation:
Dosage usually mean amount of chemical. Some chemicals cause harm to the environment in a very low amount and some chemicals damage the environment when the amount is too high, these chemicals are not considered as toxic. Form of chemicals also affects its toxicity. Some chemicals are harmful in one state and beneficial in another state.
