Humans can have very damaging effects on ecosystems. An example is if we cut down trees, not only does that disturb the vegetation and plant life, but it also disturbs the life of the animals who relied on those trees for food and shelter.
Answer: Most microbes belong to four major groups: bacteria, viruses, protozoa or fungi. (To find out more, see the “Bacteria/Viruses/Protozoa” fact sheets). Disease-causing microbes can also be called pathogens, germs or bugs and are responsible for causing infectious diseases.
Explanation: google
Fertilized egg and has chromosomes from both parents are correct.
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