It must be widespread, limited in geological time, and distinctive.
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I think the answer is C) R I had this question and that was right for me hope this helps!
The answer for this question would be Integument, digestive, respiratory and urogenital.
The largest system that contact with the external environment would be integument and digestive. That makes two system has normal flora of microbes and not sterile like the other systems. Normal flora of microbes will prevent the pathogen microbe grows so it gives some benefit.
<span>Mitosis is the usual method of cell division, characterized typically by the resolving of the chromatin of the nucleus into a threadlike form, which condenses into chromosomes, each of which separates longitudinally into two parts, one part of each chromosome being retained in each of two new cells resulting from the original cell.
Hope this helped!
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Answer:
D
Explanation:
polysaccharides is NOT one of the four main groups of macromolecules of living things
