Question

were many small adjoining rooms that looked like the cells that monks occupied within monasteries. hooke was actually observing the cell walls within cork tissue. shortly after hooke published his observations in his book micrographia, a dutch scientist and microscope maker named antonie van leeuwenhoek observed moving particles through his single - lens microscope. he assumed that because they could move, these particles must be alive, and he called them animalcules. these particles were, in fact, microorganisms. leeuwenhoek is credited as the first to discover and describe microorganisms like bacteria and protists, and he later became known as the father of microbiology. over the next two centuries, many scientists studied and contributed to the understanding of cells, their structure, and their function. in the 1830s, after years of studying plants, german scientist matthias schleiden concluded that every structural element of a plant is composed of cells or their products. his friend and fellow german scientist, theodor schwann, reached an analogous conclusion about animals and animal cells shortly thereafter. because animal cells lack cell walls, they were difficult to identify; it was not obvious that they would be as essential to animal tissue as plant cells are to plant tissue. but schwann made a convincing argument for similarities in animal and plant cell structure. together, schleidens and schwanns conclusions comprise the first two tenets of cell theory: all organisms are made of one or more cells, and cells are the smallest unit of structure and function for organisms. however, schwann and schleiden did not yet understand cell growth. for some time, they hypothesized that new cells crystallized from the material within or between other existing cells. as cell research continued, the scientific community showed that cells form from preexisting cells - the third tenet of cell theory. in 1851, robert remak proposed that cell division is the universal method of cell formation. german pathologist rudolf virchow popularized this idea in 1855 with the latin phrase omnis cellula e cellula, which translates to every cell from a cell. the discovery of the cell and the development of cell theory laid the groundwork for pioneering discoveries across all fields of biology, from genetics to ecology. today, scientists all over the world are still uncovering exciting insights into the structure and function of cells and their parts. the process of science is iterative. ideas are built upon, tested, refuted, and used to learn even more about the natural world. relate the history of cell theory to the process of science. select all the examples that show how the development and application of cell theory was an iterative process. schleidens research on plant cells inspired schwann to conduct similar research on animal tissues. virchow applied the tenets of cell theory to pathology, the study of disease, and showed that diseases involve malfunction in normal cells. hooke and leeuwenhoek often tried to replicate each others scientific observations. this lent their microscopic observations credibility in the scientific community. leeuwenhoek made great strides in improving the microscope but was notoriously secretive. he never divulged his methods for making lenses.

Explanation:

The process of science is iterative as ideas are built upon, tested, and used to learn more. Schleiden's work on plant cells inspired Schwann (building on an idea). Virchow applied cell theory to pathology (testing and using the theory in a new context). Hooke and Leeuwenhoek's attempts to replicate each other's work (a form of testing) added credibility. Leeuwenhoek's microscope improvements (a step in the iterative process of tool - development for better scientific observation, though his secrecy is a side - note).

Answer:

Schleiden's research on plant cells inspired Schwann to conduct similar research on animal tissues; Virchow applied the tenets of cell theory to pathology, the study of disease, and showed that diseases involve malfunction in normal cells; Hooke and Leeuwenhoek often tried to replicate each other’s scientific observations. This lent their microscopic observations credibility in the scientific community.