What is the term for a structure that has no use in an organism?
a. index
b. sedimentary
c. homologous
d. vestigial

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.

cells spend most of their time in interphase

me and my friend did 2