What is the cause of the mass extinction we are currently experiencing? (Be brief, 2- 3 sentences is all it should take)

In order from Most inclusive to Least Inclusive list the the names of the heirarchy used on modern biological classification.

Match the term with the most correct definition/example

Which type of stroke occurs when a weakened blood vessel rupture?

Match the tumor marker with its indication for oncology (R.4)

A combining form consists of a word root and a:

Hormones are more active when  (15.1)

Which choice below has the structures of the alimentary canal in proper order?

Steroid hormones are made from what? (E.3)

Match the electrolyte with its corresponding physiological imbalance. (H.4)