Which would be a homologous structure to a human arm bone?
O
O
A. A whale pelvis bone
B. A lion's tooth
O
C. A chimpanzee's skull bone
O
D. A bird's wing bone

ocean expansion, global warming is melting icebergs and causing water levels to rise.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

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.