What was the motive of amateur photographers in the 19th century?

According to my lecture, viewing Stereography is similar to modern day:

Who created a body of work that documented the working class in Germany (but much of his work was destroyed by the Nazi’s)?:

Remember that this assessment must be taken in ONE sitting! You are NOT allowed to get up or exit the exam at any point. You will receive an automatic zero. No notes or electronic devices are allowed. Please turn off your cell phone and put it away.

For each statement below, determine whether each condition will promote microtubule polymerization or depolymerization The addition of a drug that prevents GDP-tubulin from dissociating from the polymer will promote microtubule . The addition of a drug that inhibits GTP hydrolysis in subunits incorporated into the polymer will promote microtubule . The addition of a drug that caps the minus end of the microtubule and prevents subunit exchange at the minus end will promote microtubule . The addition of a drug that promotes GTP hydrolysis in the microtubule will promote microtubule .

Who could be described as “America’s most well-known landscape photographer”?

The largest and most popular photographic exhibition was held at the  Museum of Modern Art in 1955 and was called:

“The embodiment of young women making photographs and the staple of this company’s advertising for years”?

Which photographer was not a member of the Photo Secession?

Who authored “Naturalistic Photography for Students of the Art”?: