Question

4: explain the discovery of cell in detail

Answer 1

There are many discoveries that have changed the course of science and the world. Nikola Tesla’s discovery of alternating currents, for example, helped pave the way for widespread access to electricity, and Louis Pasteur’s discovery that heat and disinfectant could kill bacteria improved food safety and saved millions of lives. In 1655, the English scientist Robert Hookemade an observation that would change the study of biology forever. While examining a thin, dried section of cork tree with a crude light microscope, Hooke observed that he could plainly see the cork to be made up of tiny spaces surrounded by walls, much like a honeycomb, but that the spaces were irregular and shallow (Figure 1). Further, Hooke noted that these "little Boxes" were so numerous that there were "in a square Inch above a Million... and in a Cubick Inch, above twelve hundred Millions [sic]" (Hooke, 1655).

Answer 2

Answer:

Major causes of variation include mutations, gene flow, and sexual reproduction. DNA mutationcauses genetic variation by altering the genes of individuals in a population. Gene flow leads to genetic variation as new individuals with different gene combinations migrate into a