In the first half of the 19th century, scientists Matthias Schleiden (1804-1881) and Theodor Schwann (1810-1882) proposed cell theory. In what way or technological development contributed to the elaboration of this theory?

You turn your computer on and the computer will not boot up where is something you should do to diagnose the problem?

Aisha has finished working on a word processing document that contains 15 pages. she has added some special elements in the first three pages, page 9 and 10, and page 15 from the document. she wants to print only these pages to see how they look. which option is the correct way to represent (in the print dialog box) the pages that aisha wants to print?

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.