Bacteria that grew in the bottom of nutrient broth tube is: a. Anaerobic A b. Flocculent C. Pellicle O d. Sediment

Q: Which of the following is not a stage in purifi cation of drinking water: a. fi ltration c.…

A: Step 1 Water is the only naturally occurring inorganic liquid found on earth. Water is the most…

Q: Which parameter is generally less for a fixed dome type digester?   Select one: a. Life span  b.…

A: A fixed dome type digester is a fixed dome plant's component with a non-movable gas holder lying on…

Q: Why would soil and water be added to a compost pile?

A: Compost refers to the organic material which is produced by the process of composting. Composting…

Q: Nitrogen fixing bacteria is useful in growing which crop ________ A) Wheat B) Paddy C) Legume D)…

A: Nitrogen fixation is the process of converting nitrogen from the soil and to useful product ammonia…

Q: All of the following are true about soil microorganismsEXCEPT:(a) They never affect or change the…

A: Answer- Soil microorganisms can be of different types starting from bacteria, actinomycetes, fungi,…

Q: Which of these are known to host chemosynthetic communities? a) Hydrothermal vent O b) Hydrocarbon…

A: The food chain in our ecosystem depends on the primary producers as they are capable of harvesting…

Q: An algal bloom in an aquatic ecosystem can cause the depletion of which element? Select one: a.…

A: Algal bloom refers as rapid accumulation in algae population in fresh water or marine water…

Q: In the upper portions of the soil, which organism would you expect to have the least number? A.…

A: Answers ; The organisms that is least in number in the upper portion of the soil is  The correct…

Q: Which of the following is not a matching pair?a) Potable water—presence of pathogensb) High BOD—high…

A: Filamentous bulking refers to the uncontrolled growth of filamentous bacteria. Primary treatment…

Q: Denitrifying bacteriaa. convert ammonia to nitrate.b. convert nitrate to ammonia.c. convert N2 to…

A: Answer is d.) convert nitrate to N2.

Q: • A. Uses iron as a carbon source • B. Uses glucose carbon source • C. Uses lactose carbon source D.…

A: 26) when iron is used it changes to gold color, when it is hot. It can be bright blue in color,…

Q: The conversion of ammonia to nitrate, known as _______________, is a two-step process performed by…

A: Nitrogen cycling is a biogeochemical cycle that converts atmospheric dinitrogen molecules into…

Q: What role do biofilms play in trickling filters?

A: Wastewater treatment is an interaction used to eliminate impurities from wastewater or sewage and…

Q: The rhizosphere is: Group of answer choices A.) an area 1-2 mm in thickness adjacent to the root.…

A: It is the type of close and long term biological interaction between two different biological…

Q: With the low nutrient concentrations in manures/organic matter, why use it at all

A: In agriculture, plant yield is enhanced by using pesticides and chemical fertilizers such as urea,…

Q: Explain why most microorganisms are present in the upper layers ofthe soil.

A: Abiotic and biotic constituents make up the biosphere. The tiny, minute organisms that cannot be…

Q: Environmental factors that could lead to failure of water treatment plant?

A: water treatment plants are those large scale equipments which helps in clearing and sterilizing…

Q: What type of soil does munggo beans grow best? A. CLAY SOIL B. SAND SOIL C. LOAM SOIL  Explain…

A: Mung bean sprouts are the only microgreen I can grow completely without soil. They grow quickly.

Q: Which process converts ammonium (NH4+ ) into nitrate (NO3− )?a) Nitrogen fixationb) Ammonificationc)…

A: Nitrite removal is even easier, with nitrite being oxidized by the enzyme nitrite oxidoreductase and…

Q: Writer a review on the health effects of mould and air spores

A: Fungi are eukaryotic organisms, which are heterotrophs and have important roles in nutrient cycling…

Q: a) Anoxic sludge digestion is a secondary waste water treatment; what are the major microbial…

A: Waste water management includes two major steps : Primary treatment and Secondary treatment. In…

Q: a Synergistic mechanism has been used as the hurdle technology in the food preservation process. (a)…

A: Following i will be answering questions regarding hurdle technology in food preservation:- Hurdle…

Q: Select the following characteristics that clay soils possess. I. Poor aeration. II. Poor drainage.…

A: Option (D) is correct answer. Clay Soils: Clay is a fine grained natural soil material containing…

Q: A Animal waste would no longer produce ammonia. B Nitrogen gas could not enter the soil. C The…

A: Nitrogen cycle  It is a biogeochemical where nitrogen is converted into many forms and circulate in…

Q: Soil could be deficient in any of the following nutrients. If you had to supply one of these to the…

A: Plants require nutrients to grow and soil is the major source of nutrients.There are 17 essential…

Q: are water bodies natural factor or human factor?

A: Our water supplies are under pressure from a variety of factors, the majority of which are caused by…

Q: Decomposing organic matter in soil is called______ . a. clay d. silt b. humus e. sand c. topsoil f.…

A: Introduction In the soil, there are numerous bacteria and other microbes that can breakdown organic…

Q: Which of the following occurs when a biofilm (or a part of it) begins to starve or experiences…

A: Biofilms These are defined as the collection of one or more types of microorganisms which can grow…

Q: How can primary sewage treatment be used as a source of biofuel? a.Fermentation of BOD allows…

A: Biofuel is regarded as one of the purest and most easily accessible fuels. Biofuels are made from…

Q: Rhizobium is important agriculturally because it supplies __________ to plants such as peas and…

A: Rhizobium is a rod shaped bacterium which are found in the roots of leguminous plants such as sweet…

Q: Dissimılatory nitrate reduction carried out by bacteria can lead to loss of nitrogen as N2 from the…

A: Dissimilatory nitrate reduction is process which involve nitrate reduction, dinitrification,…

Q: Which statement among A-C is not applicable to flocculation, or floc formation, during wastewater…

A: Flocculation : Flocculation is a process in which solids form larger clusters or flocs which further…

Q: In the context of the phosphorous cycle, which of the following processes is indicated by arrow ac?…

A: Phosphorous is very important for all organisms. It also participates in respiration, photosynthesis…

Q: Describe the roles of microbes in: a. The formation of root nodules and The Rhizosphere c. The…

A: A. Formation of root nodules- Bacteria invade the roots of leguminous plants, causing them to…

Q: Microaerophilic bacteria a. are killed at atmospheric oxygen b. grow well in 20% 02 incubator c.…

A: Microaerophilic bacteria are those which can survive in oxygen but they requires environment where…

Q: Which of the following statements is NOT as description of soil? A. Varying nutritional content.…

A: Soil covers the earth's surface. The terrestrial plants are rooted in the soil. The root hairs of…

Q: Chemoheterotrophic decomposers are called  A. Saprobes B. Commensals C. Parasites D. Politicians

A: Chemoheterotrophic decomposers are a group of organisms that procure their energy from chemicals of…

Q: Filtration to remove protozoa occurs in:   Question 5 options:   A)  anaerobic sludge digestion.…

A: Protozoa are single-celled eukaryotes that are either free-living or parasitic feeding on organic…

Q: Provide 3 reasons why soil is an excellent source for microbes especially potential antibiotic…

A: Soil is a layer of material present on the surface of the earth in which plants grow. It consists of…

Q: Process where waste materials are digested by microorganisms is called Which term is appropriate for…

A: Microorganisms are the small organism which can be seen by naked eyes and cause diseases. Not all…

Q: Which of the following factors would explain why there is a decreasing trend of microbial population…

A: Bacterial growth occurs when a bacteria divides into two daughter cells, a process known as binary…

Q: The addition of ammonium caused heavy phytoplanktongrowth in the cultures, but the addition of…

A: . The phytoplanktons occupy the position of the primary producer in an ecosystem. It is autotrophic,…

Q: Which essential chemical must be “fixed” by soil-dwelling bacteria before it can enter the food…

A: The essential chemical must be “fixed” by soil-dwelling bacteria before it can enter the food chain…

Q: I. Effect of pH on ezyme activity pH Test tube Observation I 2 4 4 5 12 Conclusion: 8. 3.

A: Enzymes are highly specialized proteins that have extraordinary catalytic power, greater than that…

Q: name some factors that determine the microbial activities in the soil.

A: Microbial growth can be affected by different environmental factors such as temperature, osmotic…

Terrestrial Ecosystem

An ecosystem is a collection of interconnected communities. It includes both living and non-living elements of specific strata. The terrestrial ecosystem is solely related to the ecosystem present on the land and covers 25 to 30% of the total earth’s surface area.