Your best friend passes you in the school hallway and glares at you without speaking. You think, Now, why did she do that? One possible explanation could be that she saw you flirting with her boyfriend. Within the framework of the scientific method, that possible explanation for your friends behavior would be considered a(n), which will remain tentative until it has been tested.

Causation can be proved by using an

The frequency in wich you perform certain exercise depends on the blank of the exercise

A41-year-old man comes to the clinic complaining of a chronic cough over the past 4 months, which has now been accompanied by haemoptysis. he denies smoking or any past medical history. on physical examination, his head and neck examination is normal. his lungs have diffuse bilateral rales. cardiac examination is normal. laboratory findings reveal na 142 meq/l, k 4.2 meq/l, cl 110 meq/l, hco3 24 meq/l, bun (blood urea nitrogen) 39 mg/dl, creatinine 2.9 mg/dl. urinalysis reveals microscopic haematuria and 4+ proteinuria. which of the following serologic blood tests would most confirm the suspected diagnosis? - anti-glomerular basement membrane antibodies- anti-mitochondrial antibodies- anti-neutrophilic antibodies- anti-parietal cell antibodies- anti-smooth muscle antibodies