Genetic variation enables bacteria to adapt to changes in their environment. Since, bacteria reproduce asexually (binary fission), they can share genes (genetic transfer) via other mechanisms such as conjugation (exchange of genetic material through direct contact between two bacteria), transformation, and transduction(exchange of genetic material via bacteriophages).
Transformation is a process by which bacteria takes in DNA from its environment through the cell membrane.
Answer:
Transmission electron microscope is the best one due to high magnification power.
Explanation:
Micrographs or photograph obtained from the optical microscope is not very clear because it has the magnification power up to 1000x while the scanning electron microscope has magnification power 30000x which is quiet higher than optical microscope so the micrographs is better than optical microscope and gives more information about the specimen, and the transmission electron microscope has the magnification power up to 500000x which has the highest of magnification so the micrographs obtained from this microscope is the best due to more information about the size and structure of the specimen.