What is believed to be the concentration of bacteria in soil? 109-1010 cells/g dry weight 105-106 cells/g dry weight 10-2-10-3 cells/g dry weight 1010-1011 cells/g dry weight 10-9-10-10 cells/g dry weight

Q: You will appreciate the abundance of soil microbes when you consider that the plate of them we…

A: Microbes have a crucial part in the soil's production. They generate lytic enzymes that aid in the…

Q: please write an introduction on the effects of ph on Microbial Growth

A: pH is defined as a negative logarithm of hydrogen ion concentration.For the proper growth of…

Q: High buffering capacity means the soil has more sand than soil with low buffering capacity. True or…

A: Buffers are substances that can resist changes in pH. It is a combination of a weak acid and its…

Q: Enrichment culturing may require use of controlled environmental conditions.   True False

A: Enrichment culturing involves selection and growth of a particular type of microorganism.…

Q: A medium containing an abundance of substrate was seeded with 20 mg/L VSS of an active mixed…

A: Biological culture is a common laboratory method for the study of living things. There are different…

Q: Biofilms often consist of multiple species of bacteria.True or false?

A: Bacteria are the prokaryotic organisms. They are unicellular type.

Q: Bioprospectors extract precious gems and minerals from natural areas. True False

A: Natural sources are rich in gems, minerals, ores, and other useful products. These products can be…

Q: Which element is responsible for causing soil salinity?At what concentration does the soil become…

A: Soil salinity as the term suggests is the salt content of the soil and the term of salinization…

Q: Why is algae being grown in wastewater

A: INTRODUCTION Production and emission of CO2 from different sources have caused significant changes…

Q: What terms are used to describe organisms whose growthpH optimum is very high? Very low?

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: What are biofertilisers? A farmer is advised to add a culture of bacterium in the soil before sowing…

A: A fertilizer is a substance which is applied to soil or plant to increase the soil fertility or…

Q: Why should soil moisture be continuously monitored

A: Monitoring of soil moisture is important because at different stages of plant growth and development…

Q: Why is it necessary to make pure subcultures of organisms grown from clinical specimens? How does…

A: Introduction: A subculture is developed by transferring several cells from an earlier culture to a…

Q: There is a general statement that "organic matter content of Pakistani soil is low" ,why?

A: Organic matter is an important component of soil. It increases water holding capacity of the soil by…

Q: The diagram below shows a setup for a plant investigation. Which variable is most likely being…

A: Experimental design can be defined as a research methodology in which one or more characteristics…

Q: Name the element that causes salinity in the soil.

A: Soil salinity is caused due to an increased concentration of salts in the soil. This process of…

Q: Give examples of mesophilic and thermophilic spore formers of concern in the food industry.

A: One of the main concern of the food industry is the microbial contamination.

Q: Calculate mean growth rate and generation time of a culture that increase in exponential phase from…

A: Generation time is time taken for culture organisms to double in size. Generation time = t/n  where…

Q: Explain a simplified soil profile.

A: Soil can be defined as the powdered form of rocks (that have been weathered by different…

Q: The lag phase does NOT occur if an exponentially growing culture is transferred into a nutrient rich…

A: Microbial growth is said to occur when there is an increase in the number of cells rather than an…

Q: Calculate the growth rate and generation time of a culture that increases in the exponential phase…

A: Growth refers to changes in viable cell count as compared to time. The time it takes for bacteria to…

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: Biofilms often consist of multiple species of bacteria.True or false?

A: Biofilms are generally one or more kinds of microorganisms. These grow on various different…

Q: If a soil when sampled from the field weighed 30g(fresh weight) and after oven drying at 105°C…

A: The moisture content of the soil is a very important parameter. The moisture content of soil depends…

Q: List the benefits of humus in the soil.

A: The humus is organic element of soil, shaped by the decomposition of leaves and alternative material…

Q: The Allium Test is a common test in environmental science. What are some disadvantages to this test?

A: Biotechnology is technology that utilizes biological systems to develop or create different…

Q: Calculate the growth rate and generation time of a culture that increases in the exponential phase…

A: The growth of bacteria over a period of time is represented by a growth curve. This curve tells the…

Q: Why must the poured Mueller-Hinton Agar not be too shallow?

A: Mueller-Hinton agar is a popular microbiological growth medium for the purpose of determining an…

Q: What is a disease and why is it an important issue in aquaculture?

A: Introduction Aquaculture:- Aquaculture is the farming of aquatic animals or plants, including…

Q: The factors for the manipulation of culture medium?

A: Culture medium It is also called a growth medium. It is a solid, liquid, or semi-solid medium that…

Q: Glass slides were used to observe biofilm formation by submerging them in a water sample collected…

A: Biofilm is a complex and structured community of microorganisms, including bacteria, fungi, and…

Q: Two hundred (200) bags of freshly harvested palay with 23%MC was dried and became 192 bags.…

A: Given: Two hundred (200) bags of freshly harvested palay, 23%MC 192 bags We have to Determine the…

Q: Soil colour may indicate soil's exposure to anaerobic conditions  1. True 2. False

A: The soil is an important resource for sustaining life on earth. It is used to harvest all kinds of…

Q: The normal state of cations and anions in a soil is in the hydrated state. TRUE OR FALSE

A: Hydrated state means in combination with the water. Soil is made up of very small and large…

Q: What is the grey leaf spot:  chemical control biological control any other control measure would…

A: Managing grey leaf spot is pivotal for agricultural efficiency, and different control measures can…

Q: A growth medium consisting of only known amounts of water, magnesium, calcium chloride, potassium…

A: The growth medium, also called as Nutrient Broth, is a kind of solution which is sterilized to get a…

Q: Indicate which of the following observations can be made when observing growth on nutrient agar.…

A: Colony morphology can be referred to as the visual appearance of bacterial colonies on a plate of…

Q: Which of the following is correct about biofilms? O 1) They are comprised only of psychrophiles. O…

A: Biofilms are collective group of organisms that grow together on different surfaces. Bacteria,…

Q: The rate of decomposition of detritus is affected by the abiotic factors like availability of…

A: Decomposition is usually defined as the way that the process of breaking down the trash into simpler…

Prokaryotic evolution

The term evolution means the gradual change or a transformation from a simple or primitive state to a complex or advanced state. Prokaryotic evolution is a concept that involves the evolution of the form and function of most primitive organisms (prokaryotes) through several stages and changes to form diverse life as a part of organic evolution.