A. the cell is the smallest working unit of living things
Answer:
Viruses may be defined as the organisms that shows the border line between the living and non living organisms. Viruses can only replicate when they enter in the body of a particular host.
Viruses are pathogenic for humans and can cause deadly diseases like AIDS. The pandemic condition of virus mainly depends on the the matter of time. The appearance of the disease condition before the occurrence of the another disease.
Answer: A)Consumer
Explanation:
The snake consumes animals like mice thus it is a consumer. If u want more explanation comment
Troposphere should be the answer
Covalent bonds allow carbon atoms to form numerous compounds.