A scientist wishes to create bacterial colonies on an agar plate for observation of growth. Unfortunately, directly adding bacteria from the original culture results in too many bacterial colonies to count. In order to create a solution of proper bacterial concentration for observation, the scientist performs a three-step 1:100 serial dilution of the original bacterial culture. What is the dilution factor of the final solution

Answers

Answer 1

Answer:

10⁶

Explanation:

A 1:100 serial dilution is a dilution in which the concentration decreases 100 fold (i.e., in each dilution the concentration of the culture must be multiplied by 10⁻²). The question above indicates that a three-step 1:100 dilution was applied, which means >> 10⁻² x 10⁻² x 10⁻² = 10⁻⁶. Moreover, the dilution factor can be calculated by dividing the volume of the diluted solution by the volume of the concentrated solution. The dilution factor is the inverse of dilution, thereby in this case this value is equal to 10⁶ (dilution = 10⁻⁶ >> dilution factor = 10⁶).


Related Questions

Three kinds of _________ molecules carry out genetic instructions for the production of proteins?​

Answers

Answer:

There are three types of RNA involved in protein synthesis:
messenger RNA (mRNA)
transfer RNA (tRNA)
ribisomal RNA (rRNA).

Explanation:

All three of these nucleic acids work together to produce a protein. The mRNA takes the genetic instructions from the nucleus to the cytoplasm, where the ribosomes are located.

What else, besides energy, can a molecule of glucose be broken down to form?

Answers

Answer:

carbon dioxide, water, and ATP

Explanation:

Answer:

 carbon dioxide, water, and ATP for energy.

Explanation:

cellular respirationa biochemical process in which cells break down glucose and oxygen to make

Because scientists are unable to predict when and precisely where an earthquake will occur, the government has a duty to issue building codes to ensure that all structures can withstand earthquakes. Agree and disagree

Answers

Agree. They want to make sure that when a building does take a hit that it can withstand the force.

Scientists are unable to predict when and where the earthquake will occur precisely, so the government has a duty to issue building codes to ensure that all the structures can withstand earthquakes. I agree with the given statement.

What is Earthquake?

An earthquake is a natural disaster which happens when the two blocks of the earth suddenly slip past each other, this causes the tectonic plates to move. The surface where the blocks slip is called the fault or fault plane.

Earthquake damage the buildings and other infrastructure completely which can be fatal for the people living in that area. So, to save life of people government has the duty to issue the buildings code to ensure that all the structures can withstand earthquake.

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What are potential solutions for the spike in human population
O educating women
O family planning (birth control)
O working women (contribute to the household income
O all the above

Answers

men are the problem:)

can someone help me on this question

Answers

Answer:

unknow

Explanation:

Who already watched Christmas Chronicles??

Answers

Answer:

I have and i loved it! It was so cool.

Explanation:

No idea what that is.

Can someone help me with my living earth homework

Answers

what’s ur living earth homework??

Which definition best explains the term gene expression?

Answers

Answer:

Answer:

Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule. ... Each group of three bases (codon) corresponds to one of 20 different amino acids used to build the protein.

OR

Gene expression is. the activation of a gene leading to the transcription, translation and synthesis of a specific protein.

which of these disorders is when the thyroid is overactive, which leads to increased metabolism?

Answers

Answer:

Hyperthyroidism

Explanation:

When your thyroid gland generates too much of the hormone thyroxine, it causes this condition. Hyperthyroidism causes your body's metabolism to speed up, resulting in unexpected weight loss and a fast or irregular pulse.

Which of the following molecules are needed for photosynthesis?

a
carbon dioxide and oxygen
b
water and carbon dioxide
c
glucose and oxygen
d
light and oxygen

Answers

Answer:

A is correct.

Explanation:

Answer:

b is correct

Explanation:

b water and co2

What do convection currents mean?

Answers

Answer:

Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock.

Explanation:

`4\left(y-5\right)`=

Answers

Answer: This makes no sense. message me for more help though.

Explanation:

Which of these structures are used to eliminate wastes in an earthworm?

A. Nephridia
B. Sperm ducts
C. Oviducts

Answers

Answer:
A: Nephridia

The genetically programmed death of cells is called:

Answers

Answer:

Apoptosis :)

Explanation:

Which solution would be MOST effective at reducing the emission of greenhouse gases?
A
reducing carbon dioxide production by increasing use of mass transportation

B
reducing production of fluorinated gases by changing industrial practices

C
reducing production of methane by changing agricultural practices

D
reducing nitrous oxide production by burning less solid waste

Answers

the answer should be D

Reducing nitrous oxide production by burning less solid waste.

It is 300 time more potent than carbon dioxide. It is emitted from agriculture, land use, transportation, industry.

What is green house effect?

It is a process that occurs when energy from planet's sun goes though its atmosphere and warms the planet's surface, but atmosphere prevents the heat from returning directly to space, resulting in warmer planet.

What is atmosphere?

It is a layer of  gases that envelope a planet, is held in place by the gravity of the planetary body.

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what are the Cell Division in the human liver cell​

Answers

Answer:

mitotic division

Explanation:

Which of the following happens during interphase?

Answers

Answer:

Interphase is the portion of the cell cycle that is not accompanied by gross changes under the microscope, and includes the G1, S and G2 phases. During interphase, the cell grows (G1), replicates its DNA (S) and prepares for mitosis (G2). ... In interphase, the cell gets itself ready for mitosis or meiosis.

Explanation:

Answer:DNA replication takes place making two identical copies of the genome of the cell.

Explanation:

What is necessary for the process of active transport to occur

Answers

Answer:

THE use of energy (usually in the form of ATP) is necessary for the process of active transport to occur.

Energy in form of ATP is necessary for the process of active transport to occur.

WHAT IS ACTIVE TRANSPORT:Active transport is the type of transport that involves the movement of molecules with the aid of energy (ATP).

Active transport uses energy to move molecules against a concentration gradient unlike passive transport.

Therefore, this means that energy in form of ATP is necessary for the process of active transport to occur.

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Wether the apple has a taproot or a fibrous root

Answers

Answer:

taproot

Explanation:

Apple trees roots consist of a deep taproot and lateral fibrous roots. The taproot is analogous to the carrot, which is a taproot. Lateral fibrous roots can extent to more than twice the spread of the canopy of the apple tree and are influenced by soil, water availability and competition from the roots of other plants.

Answer:Tap roots.

Explanation:Because the roots are long.

Why is the red blood cell disc in shape?​

Answers

Answer:

Red blood cells are disc in shape because it allows the cells to flow smoothly through the narrowest blood vessels and provides flexibility to squeeze through them.

hope it helps you

In humans, freckles are encoded by a dominant allele. A woman is heterozygous for freckles. According to the law of segregation, allele pairs separate during gamete formation and then randomly unite during fertilization. Which of the following would apply to this woman's child?

Answers

The child having an equal chance of inheriting the dominant allele or the

recessive allele for freckles from her mother is what applies.

The law of segregation by Mendel states that diploid organisms have a pair

of alleles and are passed to their offspring at random.

The woman being heterozygous means she has the dominant and recessive

allele present. Due to the law of segregation stating the alleles are passed

at random to the offspring, the child will have an equal chance of inheriting

the dominant allele or the recessive allele for freckles .

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the evolutionary relationship among organisms is known as

Answers

Answer:

the evolutionary relationship among organisms is known as phylogeny

How do you pronounce the full scientific name of DDT?

Answers

The full scientific name of this chemical compound is quite lengthy, like most scientific compound names..

(Dichlorodiphenyltrichloroethane)

The easiest way to pronounce it is to use this

dahy-klawr-oh-dahy-fen-l-trahy-klawr-oh-eth-eyn

Food Webs and Food Chains Worksheet
1 Look at this food chain.
lettuce
greenfly
ladybird
thrush
cat

a What does the arrow mean in a food chain?
b Name the producer in the food chain
c Name the third trophic level in the food chain.
d Name the tertiary consumer in the food chain
e What is the ultimate source of energy that drives the food chain?

Answers

Food chain is network of source energy diagram which means how one organism depends on other organism for thier  enegy to alive.

a. Arrow indicates forward direction of food chain how one organism depend on other organism.

b. The producer in the food chain is Lettuce.

c. The third trophic level organism  in the food chain is ladybird.

d.The tertiary consumer in the food chain is terthrush.

e. The ultimate source of energy that drives the food chain is lettuce.

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a) In a food chain, arrows show the movement of nutrients or energy from one organism to another. It refers to the direction of transfer of energy or nutrients from the organism being consumed to the organism consuming it.

b) The producer in the diagrammatic food chain is lettuce, followed by green fly, ladybug, thrush and cat. Producers—also called autotrophs—are living things that can make their own food through photosynthesis or chemosynthesis, the process by which sunlight or inorganic substances are converted into energy-rich organic molecules.

c. Ladybird is the third trophic level of the food chain. The term "trophic level" describes the place an organism occupies in a food chain or web, from where it obtains its food and energy. In this scenario the greenfly is the primary consumer at the second trophic level, while the ladybird is the secondary consumer at the third trophic level. Lettuce is the first trophic level in this scenario (producer).

d.Cat is the third largest consumer in the provided food chain. In a food chain or web, tertiary consumers are those species at the highest trophic level. Typically, they are carnivores that prey on other carnivores or secondary consumers.

e) Sun is the primary energy source that powers the food chain. Most ecosystems get their energy mostly from the sun. As the species consumes and is consumed by other organisms, it is passed along the food chain after being captured by producers (such as plants) through photosynthesis.

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What structural adaptation in chickens allows them to lay their eggs in arid environments rather than in water

Answers

the lumen of the digestive tract.

Although scientists do not know the exact origin of eukaryotic cells, the ______ theory does explain the origin of the mitochondria and chloroplasts.

Answers

Answer: The Endosymbiotic theory

Explanation:

The Endosymbiotic Theory states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote). This theory explains the origin of eukaryotic cells.

Which of the following choices is not among the most common cell shapes found in prokaryotes?
оооо
Cocci (spherical)
Bacilli (rod-shaped)
Spirochetes (spiral-shaped)
Recticuli (rectangular)

Answers

Answer:

Recticuli(rectangular)

"Recticuli (rectangular)" is not among the most common cell shapes found in prokaryotes. Therefore, option (D) is correct.

Rectangular cells, represented by "Recticuli" in your options, are not among the most common cell shapes found in prokaryotes. Prokaryotes are primarily characterized by cocci (spherical), bacilli (rod-shaped), and spirochetes (spiral-shaped) forms. Cocci are typically round, bacilli are elongated rods, and spirochetes exhibit a spiral or helical structure.

These shapes facilitate various functions such as movement, attachment, and replication. Rectangular cells, while theoretically possible, are not commonly observed in natural prokaryotic populations. The lack of real-world prevalence could be attributed to the structural challenges and limited advantages of such a shape in prokaryotic environments. The prevailing shapes have likely evolved due to their practical benefits, underscoring the connection between form and function in these microorganisms. Therefore, option (D) is correct.

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On average, men have a basal metabolic rate (BMR) of 1.0 kilocalorie per kilogram per hour. Lawrence weighs 198 pounds. Calculate how much energy Lawrence expends for basal metabolism per day.

Answers

The energy Lawrence expends for basal metabolism per day is 2,160 kilocalories per day.

Basal metabolic rate is defined as the amount of energy that is used when an individual is at rest.

This energy is used for life sustaining functions such as:

breathing,

circulation,

nutrient processing and

cell production.

To calculate the Basal Metabolic Rate for Mr Lawrence,

Lawrence weight = 198 pounds

60

(convert pounds to kilogramme)

1 pound = 0.453592kg

198 pounds = x

xkg = 0.453592 × 198

= 89.8 kg

But BMR for average men = 1 kilocalorie per kilogram per hour.

That is, 1 kilocalories = 1 kg per hour

x kilocalories = 89.8 per day

Therefore for a day = 89.8 × 24 ( 24 hours = 1 day)

= 2155.469184

approximately. = 2,160kilocalories per day

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describe what a growth factor is and how it influences the cell

Answers

Answer:

Growth factors are proteins that act as mitogens to stimulate and encourage cell migration.

Explanation:

Multiple choice. Please help !!!!

Answers

Answer: B. if im correct.

Explanation:

answer is b

it says my answer has to be 20 letters long

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