अंतःप्रजनन अवसाद (inbreeding depression) को कम करने और आनुवंशिक विविधता को बढ़ाने के लिए फ्लोरिडा पैंथर्स की आबादी में टेक्सास पैंथर्स की शुरुआत किस विकासात्मक अवधारणा का एक व्यावहारिक अनुप्रयोग है?

The historical reduction of the Northern Elephant Seal population to fewer than 100 individuals in the 19th century, resulting in a documented loss of genetic variation, serves as a primary illustration of which evolutionary concept?

In a polluted aquatic environment, bacteria are chronically exposed to low concentrations of antibiotics. To determine whether antibiotic resistance arises through induced mutation or random mutation followed by selection, an ecologist performs a fluctuation test similar to that of Luria and Delbrück (1943) using replicate bacterial cultures. Which one of the following outcomes best supports the conclusion that resistance arises by random mutation prior to selection?