The dinosaurs lived during the Triassic, Jurassic, and Cretaceous periods. The last trilobites went extinct about 240 million years ago. What can you conclude

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.

that scientist would be robert hooke

c. live where it’s cold and icy

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds