List two abiotic factors that affect life in the arctic

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?