Some species of which of the below kinds of organisms are employed as biopesticides? 2. Fungi 3. 1.Bacteria Flowering plants A) 1 only B) 2 and 3 only C) 1 and 3 only O D) 1, 2 and 3
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Microscopic examination
The analysis of minute organisms, cellular organization of any biological structure, and composition of body fluids with the help of a microscope is known as microscopic examination. The magnification of specimens or samples under study helps in attaining a clearer picture of it.
Gram Staining
Named after Hans Christian Gram, a Danish bacteriologist, Gram stain is one of the most powerful staining techniques within microbiology. This technique was introduced in 1882 to identify pneumonia-causing organisms. The Gram staining technique uses crystal violet or methylene blue as primary staining colors to distinguish gram-positive from gram-negative organisms. Under a microscope, the gram-positive organisms appear purple-brown, retaining the primary color. Gram-negative organisms appear pink or red as they do not acquire the color of the primary stain.
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- 27. With respect to bioremediation, the addition of desired bacteria to a bioreactor or to a contaminated site. 28. The use of microorganisms to aid in the extraction and recovery of metals from ores. T 29. A flagellated cell with a chloroplast that may be considered as a member of either algae or protozoa. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 31. A chemical produced in the laboratory and not produced by any living system. 41. Referring to microorganisms that live within rock in the pore spaces. 03 H1. The time between inoculation and the beginning of growth is usually called the A) lag phase. B) log phase ) dormant phase. D) decline phase .1. Which of the following micro-organisms are the most resistant to heat sterilization? a. Vegetative bacteria (e.g., Samonella spp.) b. Spore-forming mesophilic bacteria (e.g., Clostridium botulinum) c. Spore-forming thermophilic bacteria (e.g., Bacillus stearothermophilus) d. Toxicogenic bacteria (e.g., E. coli O157:H7) e. All of the above are equally resistant to heat sterilization.
- 1. What attributes would a microbe need (physical or biochemical) to be able to: a. Travel from Africa to North America and remain viable? b. Flourish in the new environment if it was pathogenic for man?c. Flourish in the new environment if it was pathogenic for plants?d. Flourish in the new environment if it was a soil organism?2) Provide two examples of how fungi are beneficial and two examples of how fungi are detrimental to humans Beneficial: a) b) Detrimental: a) b)1.) Algae and fungi have a symbiotic association in lichen. A controversy exists over the type of symbiotic association occurring in lichens. While some researchers are of the view that the association is a type of parasitism, most researchers believe that the symbiotic association between algae and fungi in lichen is A.) ammensalism B.) mutualism C.) neutralism D.) commensalism 2.) Which of the following statements about intraspecific competition is not correct? A.)Intraspecific competition exists between members of the same species. B.)Species members compete for food. C.) Species members compete for space. D.) Species members do not compete for the opportunity to breed. 3.) Population 1. Randomly mating population with immigration and emigration Population 2. Large breeding population without mutation and natural selection Population 3. Small breeding population without immigration and emigration Population 4. Randomly mating population with mutation and emigration Which of the…
- A product that contains benzovindiflupyr and azoxystrobin will kill which microorganism? O A. Chlamydomonas O B. Agaricus O C. Ulva O D. Chlorella O E. SpirogyraWhich of the following involve symbiotic relationships? A. mycorrhizae AND ruminants B. ruminants AND myxobacteria C. myxobacteria, ruminants, AND rhizobia D. rhizobia, mycorrhizae, AND ruminantsAfter some time, you found out that you did not like working in microbiology lab, so you found a job at an Environmental lab. Some park attendants said that their dogs took a dive in one of the park’s ponds and after few days they became sick. So, you went to the park and took a sample of the water to analyze it 14) Name the disease or sickness they cause in humans15) Name the phenomenon they are responsible for in marine habitats16) What do these organisms use for movement?17) If these organisms reproduce at a high rate, what will happen to the other aquatic life forms living in the pond? Why
- 2. In endospore germination, which of the following is/are used as carbon source? A) Calcium ions B) Dipicolinic acid C) SASPS D) SpoAAn organism is a mixotroph loses its plastids, it survives because of which reason; 1. It has an endospore and becomes dormant until conditions improve 2. It has photosynthesis by membranes present in the cytoplasm 3. since it is also a heterotroph engulfs organic material by phagocytosis or by absorption for nutrition 4. uses mitochondria that acquite after loosing its plastids3. Trichonympha and other microbes supply cellulase, the enzyme needed to break down cellulose, which is the primary chemical constituent of wood and other fibrous plant parts. What ecological consequences would ensue if we did not have trichonympha and other organisms producing this enzyme? 4. how could antibiotics designed to stop narrowly defined categories of infectious microbes be used to discover which organisms are mutualists and which are parasites or commensals in the termite gut? 5.Human beings carry a diverse community of bacterial species in their large intestine, including Escherichia coli strains that rarely cause disease in healthy people. The normal bacterial flora outcompetesany foreign bacterial species passing through the system. Based on these facts, is it understandable that antibiotics taken for a sore throat might cause intestinal discomfort?