Question

The first person to see the ‘live cell’ under the microscope
A. Robert Brown
B. Robert Hook
C. Altmann
D. Leeuwenhoek

Answer 1

Hint: In order to create the phenomena called life, biological processes function as a dynamic interplay of cellular components communicating over four dimensions.

Complete Answer:
Live cell imaging, utilizing time-lapse microscopy, is the analysis of living cells. It is used by researchers in the study of cellular dynamics to achieve a deeper understanding of biological activity. In the first decade of the $20_{th}$ century, live-cell imaging was invented. Julius Ries created one of the first time-lapse micro cinematographic films of cells ever produced, showing the fertilisation and growth of the sea urchin egg.

Now, let us find the solution from the options-
- Robert Brown was a Scottish paleobotanist and botanist who, mainly through his innovative use of the microscope, made major contributions to botany. Thus, option A is not the correct option.
- In the 1960s, Robert Hooke invented the word cell and found it in cork in 1665. The concept of elasticity, recognized as Hooke's law, was discovered. Thus, option B is not the correct option.
- About 1890, a German scientist named Richard Altmann invented a simpler way to protect, or repair, tissues under the microscope for inspection. To arrange the slides, he also utilised a new acid-fuchsin tissue dye. He can then see filaments inside almost all the cells he studied that seemed like strings of granules. He named "bioblasts" these complexes. Altmann indicated that the granules were simple living units essential for metabolic processes inside cells. Thus, option D is not the correct option.
- Antonie van Leeuwenhoek, who identified the algae, Spirogyra, in 1674, was just the first individual to witness live cells under a microscope. This cell he called as the animalcules. He is also regarded as the father of microbiology, as he was the first microorganism to be researched.

Thus, the correct option is option (D) Leeuwenhoek.

Note: Several microscopy techniques have been established that enable researchers to more closely study living cells with less effort. As they are seen to be more robust, a newer method of imaging using quantum dots has been used.