If only a single member of a pair of chromosomes is present in a cell, it is a condition and is most likely a cell. diploid; reproductive,
haploid; reproductive,
haploid; autosome,
diploid; autosome

haploid; reproductive

Explanation:

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

answer; cnidarians;