Which example shows an advanced understanding of the meaning and purpose of an animal’s communication?
a. a gorilla that uses sign language to express itself
b. a dog that barks at the sight of a stranger
c. a skunk that is fearless because it knows its scent will protect it
d. a cat that marks its territory with urine

she forgot to record a transaction

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.