Gentian is a flowering plant that is native to Europe. The plant can have either red, yellow, or orange flowers. The flowers of these plants are pollinated by three species of bumblebees. Species 1 and species 2 visit orange and yellow flowers. Species 3 visits plants with only red flowers. Which is a likely advantage of having three different-colored varieties within a population of gentian plants?

A It allows the species to produce a large number of seeds after pollination.

B It allows the plant to attract pollinators other than bumblebees for pollination.

C It ensures that the species will survive even in the absence of a specific pollinator.

D It ensures that the flower can self-pollinate in the absence of pollinators.

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