Problem: Increasing knowledge of plant anatomy, morphology and life cycles led to the realisation that there were more natural affinities between plants than the artificial sexual system of Linnaeus had indicated. Adanson (1763), de Jussieu (1789), and Candolle (1819) all proposed various alternative natural systems of classification that grouped plants using a wider range of shared characters and were widely followed. The Candollean system reflected his ideas of the progression of morphological complexity and the later classification by Bentham and Hooker, which was influential until the mid-19th century, was influenced by Candolle's approach. Darwin's publication of the Origin of Species in 1859 and his concept of common descent required modifications to the Candollean system to reflect evolutionary relationships as distinct from mere morphological similarity.
In what year to Candolle introduce the Candollean system?
The answer is the following: 1819

Problem: A residential elevator is often permitted to be of lower cost and complexity than full commercial elevators. They may have unique design characteristics suited for home furnishings, such as hinged wooden shaft-access doors rather than the typical metal sliding doors of commercial elevators. Construction may be less robust than in commercial designs with shorter maintenance periods, but safety systems such as locks on shaft access doors, fall arrestors, and emergency phones must still be present in the event of malfunction.
What type of elevator has a hinged wooden shaft-access door?
The answer is the following: residential

Problem: When a USB device is first connected to a USB host, the USB device enumeration process is started. The enumeration starts by sending a reset signal to the USB device. The data rate of the USB device is determined during the reset signaling. After reset, the USB device's information is read by the host and the device is assigned a unique 7-bit address. If the device is supported by the host, the device drivers needed for communicating with the device are loaded and the device is set to a configured state. If the USB host is restarted, the enumeration process is repeated for all connected devices.
When is the device assigned a unique 7-bit address?
The answer is the following: After reset

Problem: The National Library of Nepal is located in Patan. It is the largest library in the country with more than 70,000 books. English, Nepali, Sanskrit, Hindi, and Nepal Bhasa books are found here. The library is in possession of rare scholarly books in Sanskrit and English dating from the 17th century AD. Kathmandu also contains the Kaiser Library, located in the Kaiser Mahal on the ground floor of the Ministry of Education building. This collection of around 45,000 books is derived from a personal collection of Kaiser Shamsher Jang Bahadur Rana. It covers a wide range of subjects including history, law, art, religion, and philosophy, as well as a Sanskrit manual of Tantra, which is believed to be over 1,000 years old. The 2015 earthquake caused severe damage to the Ministry of Education building, and the contents of the Kaiser Library have been temporarily relocated.
How many volumes are contained in Nepal's National Library?
The answer is the following:
70,000