According to uniformitarianism, which statement is true?
a. the rate of geologic processes change over time, but the processes themselves remain the same.
b. the rate of geologic processes decrease over time, and the processes themselves change.
c. the rate of geologic processes remain the same over time, and the processes themselves remain the same.
d. the rate of geologic processes remain the same over time, but the processes themselves change.
plz im doing the test right now

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.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.