A) Amoeba
B) Drosophila
C) Pheretima
D) Ascaris megalocephala
Correct Answer: D
Solution :
The number of chromosomes in each somatic cell is the same for all members of a given species. The organism with the lowest number of chromosomes is the nematode Ascaris megalocephalus, which has only two chromosomes in his somatic cells.
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