Answer:
5.2 × 10 ⁹ cfus
Explanation:
Using the dilution factors
0.1 ml of the final dilution has 52 colonies
1 ml will have approximately 520 colonies
10 ml of the final sample will have 5200 colonies
at 1 / 100 dilution
1 ml of the sample will have 5200 colonies
100 ml of the sample will have 520000 colonies
1 ml of the 0.1 ml + 9.9 ml has 520000 colonies
10 ml will have 5200000
at the second stage of the dilution
0.1 ml of the slurry had 5200000 colonies
1 ml will have 52000000 colonies
10 ml will have 520000000 colonies
100 ml of the initial sample ( 10 grams + 90 ml ) = 5200000000 colonies =
5.2 × 10 ⁹ cfu
During an enzymatic reaction, their is an decrease in the concentration of substrate, an increase in the concentration of product, and no change in the concentration of the enzyme.
A reaction, which is mediated with the help of an enzyme is termed as enzymatic reaction. A substance, which functions as a catalyst in living organisms and regulate the rate at which the chemical reactions takes place is known as an enzyme.
The enzymatic reactions follows the lock and key model, in which the free enzyme combines with the substrate and forms the enzyme-substrate complex, this is further catalyzed into the enzyme-product complex, from which the free enzyme and product get discharged. The product never further binds with the free enzyme.
In the reaction, the substrate get used up thus its concentration decreases, while the formation of product takes place thus its concentration increases. However, there is no change in the concentration of the enzyme as it does not get used up in the process.
Thus, in enzymatic reaction, substrate decreases, product increases, and enzyme concentration remains the same.
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Answer:
decomposer
Explanation:
producer-consumer-decomposer
It is significant since it enables you to decide on the material best cost, construction, lifespan, and design.
Studying the properties of materials is essential when designing new products because it ensures that the materials used meet the necessary requirements for the product's intended function and performance. The properties of materials determine how they behave in different environment , and therefore understanding these properties is crucial to create safe, effective, and reliable products.
For example, if a product requires a material that is strong and durable, the designer needs to know the mechanical properties of different materials, such as tensile strength, compressive strength, and impact resistance, to choose the right material that can withstand the expected loads and stresses. If a product is expected to operate under different temperatures or environments, then the designer must know the thermal and chemical properties of different materials to select the most suitable one.
Moreover, different materials have different manufacturing requirements, and understanding their properties can help designers choose the most appropriate manufacturing processes and techniques for their products. For instance, the properties of materials, such as melting point, ductility, and hardness, affect the machining, casting, and forming processes that can be used to manufacture them.
In summary, studying the properties of materials is crucial when designing new products because it helps designers choose the right material, ensure the product's performance and safety, and select the appropriate manufacturing processes. By understanding the properties of materials, designers can make informed decisions that lead to the creation of better, safer, and more functional products
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Studying the properties of materials when designing new products is crucial as it determines the product's performance, durability and safety. Understanding these properties can also lead to cost reductions, more efficient use of resources, and enhanced sustainability.
When designing new products, studying the properties of materials is crucial for several reasons. The performance, durability, and safety of a final product are directly related to the materials used in its construction.
For example, if a new bridge is being designed, the properties of the steel, concrete, or other materials being used must be thoroughly understood. The steel, for instance, must be strong enough to support the weight of the bridge and its loads, and the concrete must be durable to withstand weather conditions and regular use.
Also, understanding the properties of the materials can lead to cost reductions, more efficient use of resources, and enhanced sustainability. Consequently, it’s incredibly important to analyze these properties to ensure the success of any design project.
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B. In maternal effect, an offspring will have the genotype of their mother.
C. In a reciprocal cross, if an offspring has the mother's phenotype for both crosses, cytoplasmic inheritance is responsible.
D. The direction of shell coiling in Lymnaea peregra is influenced by the orientation of the first cleavage division.
E. It is safe to say that a maternal effect is caused by the genotype, not the phenotype, of the parent producing the egg.
Answer:
Answer is D.
Explanation:
The first cleavage division can be explained or described as the series of first cellular division of the zygote after fertilization.
In this case, the process of recoiling of the shell of the snail can not be categorized as one of the examples at this stage.
Answer:
Plants and animals assimilate carbon-14 from carbon dioxide throughout their life. When they die, they stop exchanging carbon with the biosphere and their carbon-14 content begins to decrease at a rate determined by the law of radioactive decay.
Radiocarbon dating is basically a method designed to measure residual radioactivity.
Explanation:
Carbon-14 is a weakly radioactive carbon isotope; It is also known as radiocarbon, and is an isotopic stopwatch.
Radiocarbon dating is only applicable to organic materials and some inorganic materials (not applicable to metals).
Proportional gas counting, liquid scintillation counting, and accelerator mass spectrometry are the three main methods of radiocarbon dating.
The radiocarbon, or carbon-14, is an isotope of the carbon element that is unstable and weakly radioactive. The stable isotopes are carbon-12 and carbon-13.
Carbon 14 is continuously formed in the upper atmosphere by the effect of cosmic ray neutrons on nitrogen-14 atoms, rapidly oxidizing in the air to form carbon dioxide and entering the global carbon cycle.
Accelerator mass spectrometry (AMS) is a modern method of radiocarbon dating that is considered the most efficient way to measure the radiocarbon content of a sample. In this method, the content of carbon-14 is measured directly in relation to carbon-12 and carbon-13 present. The method does not take into account beta particles, but the number of carbon atoms present in the sample and the proportion of the isotopes.