A lawn of Pseudomonas aeruginosa was grown for 24 hours and then scraped completely. The mass of bacteria was suspended in 5ml of sterile saline. An aliquot of the suspension was measured using a Spectrophotometer.
The absorbance or OD600 of the initial suspension was measured at 0.892.
The suspension was serially diluted. In each tube 1ml of the previous dilution was added to 9ml of saline. In the boxes above the tubes write the dilution of that tube as a ratio. The first one is done for you.
Answers
Answer:
Explanation:
2.20 2.60 3.7 3.40
Related Questions
In the 1950s, Stanley Miller and Harold Urey designed experiments that tested Alexander Oparin's and J.B.S. Haldane's hypothesis that conditions on the primitive Earth favored chemical reactions that synthesized more complex organic compounds from simpler organic precursors. Miller and Urey used an apparatus that recreated the conditions of what a primitive Earth was thought to consist of at the time. Methane, hydrogen, ammonia, and steam were all included to recreate conditions similar to that of a primitive Earth. Their goal was to create complex organic molecules from the simple organic molecules that were believed to be part of primitive Earth's makeup. The Miller-Urey experiment was run for a week and the samples collected were analyzed. Analysis showed that some of the carbon in the apparatus was converted to amino acids molecules. In later experiments, similar to Miller and Urey's, it has been shown that it is possible to form all 20 amino acids commonly found in organisms. Along with nucleic acids, other molecules were detected in samples. Some of these were sugars, lipids, adenine, and even ATP in certain conditions.
Based on the information in The Miller-Urey Experiment reading passage above, which of the following statements is most accurate?
Answers
Answer:
where are the following statements
Explanation:
Use the diagram below. You observe Protist 2 under a microscope and notice that it moves using the structure that is visible at point C. What is the name of this structure? Question 8 options: cilia hyphae flagellum pseudopod
Answers
Answer:
flagellum
Explanation: Hope this helps!
Student Exploration: Photosynthesis Lab
Answers
Answer:
wey has una pregunta entendible
Explanation:
Answer:
photosynthesis is the process of a plants growth and food source.
Explanation:
I learn it in my science curriculum.
The _____________ caused the movement of people to more urban areas.
Answers
Answer:
The growth of cities.
hope this helped you
Which of the following does NOT correctly match a fault with its boundary?
normal fault & convergent boundary
normal fault & divergent boundary
reverse fault & convergent boundary
strike-slip fault & transform boundary
Answers
Answer:
reverse fault & convergent boundary
Explanation:
because I feel like that the best option
A mother with the genotype
Aa displays the dominant
version of the trait. Her
husband displays the
dominant version of the trait.
What version of the trait
would their child display?
A. The child would display the recessive
trait.
B. The child would display the dominant
trait.
C. The child would display some of the
dominant trait and some of the recessive
trait.
D. We need more information about the
father's genotype.
Answers
More information is needed about the father's genotype before the version of the trait that would be displayed by the child can be predicted (option D).
What is genotype?Genotype is the part (DNA sequence) of the genetic makeup of an organism which determines a specific characteristic (phenotype) of that organism.
The genotype responsible for a trait in an organism is usually in pairs or versions called alleles. The allele can either be dominant or recessive depending on whether it is expressed or masked respectively.
According to this question, a mother with the genotype "Aa" displays the dominant version of the trait. Her husband also displays the dominant version of the trait.
However, the exact genotype of the father is required to be able to predict the genotypic outcome of their offsprings.
Learn more about genotype at: https://brainly.com/question/29156144
#SPJ1
The period between the entry of micro organism into the body and the start of the diseases is referred to as
Answers
Answer:
Incubation period
Explanation:
The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient). It is during this time the pathogen begins multiplying in the host
Which energy-carrying molecule is produced by photosynthesis?
Answers
Answer:
Glucose
Explanation:
Glucose, C6H12O6, is the energy-rich product of photosynthesis, a universal food for life. It is also a six-carbon monosaccharide, or simple sugar.
Glucose.
Photosynthetic cells contain chlorophyll and other light-sensitive pigments that capture solar energy. In the presence of carbon dioxide, such cells are able to convert this solar energy into energy-rich organic molecules, such as glucose.
Please help I need the answer ASAP
Answers
Answer:
I am guessing Cenozoic
Explanation:
I hope this helps
Explanation:
the answer is A. I'm sure of it
What structure would clearly show that “Spanish moss” is NOT really a moss?
Answers
Answer:
because it grows on a tree just to get more sun
Explanation:
Answer:
Spanish moss is not a moss but a bromeliad—a perennial herb in the pineapple family.
Explanation:
The clownfish is a species of fish that lives between the stinging tentacles of sea anemones. The clownfish protects
the anemone from anemone eating fish, while the anemone's tentacles protect the clownfish from predators The
relationship between clownfish and anemone is an example of
A)
commensalism.
B)
competition
C)
mutualism
D)
parasitism
10)
Answers
Answer:
A) commensalism.
explanation:
commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.
Answer:
C mutualism
Explanation:
both the sea anemone and the clown fish benifit from the relationship
What would happen to an ecosystem if an invasive
species has no predators? Explain in detail.
Please help!!!!!!!!!!
Answers
Explanation:
the top predator is removed from the delicate balance of any particular ecosystem, there may be disastrous effects for the other plants and animals that inhabit the environment.
When a top predator is removed from an ecosystem, a series knock-on effects are felt throughout all the levels in a food web, as each level is regulated by the one above it. This is known as a trophic cascade. The results of these trophic cascades can lead to an ecosystem being completely transformed. The impacts trickle down through each level, upsetting the ecological balance by altering numbers of different animal species, until the effects are finally felt by the vegetation
When a top predator is no longer present, populations of their herbivorous prey begin to boom. Without a top predator to regulate their numbers, these animals put a great deal of pressure on the existing vegetation that they require for food and can destroy large amounts of plant life, such as grasses and trees. This then causes further problems, such as soil erosion and loss of animal habitat. Eventually, humans are also impacted due to the resulting lack of soil fertility and clean water that depend on these plants.
Another problem involving the loss of vegetation is the competition that is created between herbivorous species. Competition between species for the remaining plant life is high and weaker species lose out to stronger ones, leading to the potential loss of weaker animals, as well as plant species. Increased competition, therefore, leads to a lack of biodiversity. In contrast, top predators often have varied diets, which means they can pursue a new food source if one is running low, preventing the first source from being eradicated completely. This is one of the ways that top predators are able to maintain biodiversity and the balance of an ecosystem.
The presence of a top predator also helps to maintain balance in an ecosystem by influencing the behaviour and movements of its prey through the fear of being caught. Animals that are prey to a top predator will move around in order to avoid it. This prevents plants and animals in any particular area of an ecosystem from being over-consumed, preserving food sources and habitats. In the absence of top predators, this regulation disappears, allowing certain areas of vegetation to be destroyed completely.
Answer:
That species would likely run rampid, due to it having no predators. The ecosystem may eventually recover, but it won´t be the same.
Explanation:
:) trust me!
Do the people at T mobile keep your browser history and things like that??
Answers
Answer:
2x - 9y = 23
5x - 3y = -12x - 9y = 23
5x - 3y = -12x - 9y = 23
5x - 3y = -12x - 9y = 23
5x - 3y = -12x - 9y = 23
5x - 3y = -12x - 9y = 23
5x - 3y = -1
Explanation:
Describe the structure of human kidney.
answer in brief..okay..i appreciate correct one.
Answers
➜ Kidneys are bean-shaped and located at the back of abdomen, one on either side of backbone. Its inner concave surface has a depression called hilum through which renal artery enters and renal vein leaves the kidney. Kidney has two regions: outer cortex and inner medulla. Each kidney has a large number of filtering units called nephrons.
Note: See picture attached to get the idea.
❅ Structure of Kidney —
Length: 10-12 cm.
Width: 5-7 cm.
Thickness: 2-3 cm.
Location: both sides of the vertebral column.
EXPLANATION:❅ Hilum —
The hilum is a notch which is present on the inner surface towards the centre of the kidney. This notch allows the entrance of blood vessels, nerves and ureter in the kidney.
❅ Renal Pelvis —
Funnel-shaped structure towards the inner hilum. It has two zones. The inner zone is known as the medulla, and the outer zone is known as the cortex.
❅ Medulla —
It is divided into small medullary pyramids which are conical in shape. These are projected through the calyces.
❅ Cortex —
It is a structure which is present between the renal columns and the medullary pyramids. Columns of Bertini is another name of the renal columns.
❅ Nephrons —
These are particularly important and functional units of a kidney. They are complex tubular structures present in the count of millions. There are two parts of a nephron which include glomerulus and tubule. The glomerulus is responsible for the filtration of blood and toxic substances like nitrogenous wastes and ammonia.
human activity can affect ecosystems by removing producers, consumers and decomposers. What limiting factors may result from human actions, and what affects might they have on the flow of energy and matter in s ecosystem?
Answers
What is an example of mutation that could cause a phenotype that makes organism better suited for its environment?
Answers
Explanation:
for example:-If a mutation led to brighter feather colouring in birds, the brighter feathers may allow those individuals with the mutation to reproduce more frequently, because they are seen as being more attractive and a desirable mate.
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Answers
Put the following images in order. ILL GIVE BRAINLIEST
Answers
Answer:
Explanation:
the daughter cells go last because it is the result
What one characteristic separates both Archaea and Bacteria from the other kingdoms?
A.
prokaryote
B.
heterotrophs and autotrophs
C.
eukaryote
D.
unicellular
Answers
Answer:
C. hope it helps.......
Describe the similarities and differences between prokaryotic cells and eukaryotic cells.
Answers
Answer:
Prokaryotic cell have no membrane bound organelles and no membrane bound nucleus. Eukaryotic cells are found in plants, animals, protists and fungi.
What is a strict aerobe
Answers
An organism able to live and reproduce only in the presence of free oxygen (e.g., certain bacteria and certain yeasts). Organisms that grow in the absence of free oxygen are termed anaerobes; those that grow only in the absence of oxygen are obligate, or strict, anaerobes.
can someone help with the question below would mean alot
Answers
Answer:
b hope this helps just took text edge
Explanation:
In DNA replication, which of the following events happens during both leading and lagging strand synthesis?
Choose 1 answer
Answers
On the leading strand, DNA synthesis occurs continuously. On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule
When plants perform (photosynthesis OR breathing) they take carbon dioxide out of the
atmosphere and release oxygen.
Answers
Answer:
Photosynthesis
Explanation:
Plants perform photosynthesis in the chloroplasts. They take in carbon dioxide and release oxygen.
Extend: If mushrooms were producers, how would your results in question 3 have been different?
Answers
Answer:
if mushrooms were produsers the bear and tree populaton would also increse
Explanation:
What are high and low pressure systems? How
do they both work? What happens in the area
they meet?
(Please help me!!)
Answers
A low pressure system has lower pressure at its center than the areas around it.
Winds blow towards the low pressure, and the air rises in the atmosphere where they meet.
Identify Three Solutions To Help Solve 3 Climate Issues
Answers
Answer:
1. Use less cars travel way less with them if youan use a bike or walk to try stop too much CO2 being produced
2. Use less papaer or recyle trees are being cut down for them wich break down habittats and prevents filtrating CO2
3.RECYLE recylimg is something everyone can do it helps stop polution, rubish being frown in the seas oceans and animals eating them
Answer:
3 Climate Issues; Ocean Acidification, Soil Degradation, and Greenhouse Gases.
The Simple Solutions; Protecting ocean life from marine agriculture which removes crucial matinence of the ocean. Avoid the use of unnecessary fertilizers that remove nutrients and life in soil. Cut the supply of funding to industries that promote emissions of harmful gases including the military, agriculture, and transportation.
Explanation:
Individuals That are well adapted to their environment will survive and produce what
Answers
butterflies bats and birds all have wings that allow them to fly butterfly wings however do not have bones like that in birds do
Answers
a system that relates the layers of rock to time?
Answers
Answer:
Basic Of Algebra. Basics of Algebra cover the simple operation of mathematics like addition, subtraction, multiplication, and division involving both constant as well as variables. For example, x+10 = 0. This introduces an important algebraic concept known as equations.Explanation:Basic Of Algebra. Basics of Algebra cover the simple operation of mathematics like addition, subtraction, multiplication, and division involving both constant as well as variables. For example, x+10 = 0. This introduces an important algebraic concept known as equations.