What are the three domains of life? What are the defining characteristics of each domain? Define 'microbiology'. What are the major categories of 'microorganisms' or 'microbes'? Wh... What are the three domains of life? What are the defining characteristics of each domain? Define 'microbiology'. What are the major categories of 'microorganisms' or 'microbes'? What are the defining characteristics of each category? What role do microbes play in our ecosystems? What role do microbes play in health? What role do microbes play in our economy? Where is the cell wall/envelope found in bacteria? What are the two major types of cell wall in bacteria? What are the major components of the cell walls in bacteria? What is lipopolysaccharide? Where is it found? Define flagella, pili, fimbriae, capsule, and glycocalyx, and describe their function. What is the cell membrane? What is important about its structure? What function does it provide? What is the genetic material of bacteria? Where is it found? What does it contain? What do the ribosomes do? How do bacteria reproduce? What key things happen during bacterial cell division? Do all bacteria grow at the same rate? What factors might influence how quickly bacteria grow and divide? Read more

The three domains of life are Archaea, Bacteria, and Eukarya, each with unique characteristics. Microbes, essential for ecosystems and human health, include categories such as bacteria and fungi. Bacteria cell walls differ as Gram-positive or Gram-negative. Reproduction occurs by binary fission.

The three domains of life are Archaea, Bacteria, and Eukarya. The defining characteristics of each: Archaea have unique lipid membranes and thrive in extreme environments; Bacteria have peptidoglycan in their cell walls; Eukarya have complex cell structures with nuclei. Microbiology is the study of microscopic organisms. Major categories of microorganisms include bacteria, fungi, viruses, algae, and protozoa. Each has distinct structures and functions. Microbes are critical in ecosystems for decomposition and nutrient cycling, play roles in health such as in digestion and immunity, and impact the economy through processes like fermentation. In bacteria, the cell wall/envelope is exterior to the cell membrane. The two major types are Gram-positive and Gram-negative. Major components include peptidoglycan, lipopolysaccharide, and teichoic acids. Lipopolysaccharide is found in the outer membrane of Gram-negative bacteria. Flagella, pili, fimbriae, capsule, and glycocalyx serve for movement, attachment, protection, and cellular communication. The cell membrane encloses the cell with a phospholipid bilayer and controls substance passage. Bacterial genetic material is typically a circular DNA chromosome found in the nucleoid and contains essential genetic information. Ribosomes synthesize proteins. Bacteria reproduce by binary fission, involving DNA replication and cell division. Bacteria growth rates vary and are influenced by factors like temperature and nutrient availability.