Two different bacterial samples, a and b, were inoculated onto eosin methylene blue (emb) agar. what can you conclude based on your observations?

Answers

Answer 1

To draw conclusions based on the observations of bacterial samples A and B inoculated onto Eosin Methylene Blue (EMB) agar,

we would need more specific information about the characteristics of the colonies and the color changes observed.

EMB agar is a selective and differential medium commonly used for the isolation and differentiation of Gram-negative bacteria, particularly those belonging to the Enterobacteriaceae family.

Here are a few possible conclusions that could be made based on different observations:

Differential Growth: If bacterial colonies are observed on the EMB agar, it indicates that both samples A and B are able to grow on this medium. The presence of colonies suggests that the samples contain viable bacteria.

Color Differentiation: EMB agar is designed to differentiate between lactose fermenters and non-lactose fermenters. The medium contains dyes that react with acid produced by lactose fermenters, leading to the formation of dark purple or black colonies. Non-lactose fermenters typically appear as colorless or pale colonies. Based on the color of the colonies, you can determine whether a particular bacterium is a lactose fermenter or a non-lactose fermenter.

If sample A shows dark purple or black colonies, it suggests that there are lactose fermenting bacteria present in sample A.

If sample B shows colorless or pale colonies, it indicates the absence of lactose fermenters in sample B or the presence of non-lactose fermenters.

Growth Pattern: Observing the growth pattern, texture, and size of the colonies can provide additional information about the bacteria. Dense or spreading colonies may indicate a high growth rate or the presence of motile bacteria. The presence of mucoid or slimy colonies may suggest the production of exopolysaccharides or the presence of capsules.

Quantitative Analysis: By counting the number of colonies from each sample, you can compare the bacterial load or estimate the colony-forming units (CFUs) in the original samples.

To make more specific conclusions, it would be helpful to provide further details about the observations or characteristics observed on the EMB agar.

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Related Questions

the endocrine system appears to play a role in which types of disorders?

Answers

Menopause.

Diabetes.

Addison's disease.

Cushing's disease.

Graves' disease.

Hashimoto thyroiditis.

Hyperthyroidism/hypothyroidism.

Prolactinoma.

9. why did sabrina think it was important for
people to make eye contact with each other?
in piecing me together

Answers

Sabrina believed that eye contact was important because it fosters genuine connections, enhances communication, and demonstrates respect and attentiveness to others.

In "Piecing Me Together," Sabrina emphasized the importance of eye contact in human interactions. She thought that making eye contact encourages people to form authentic connections and engage more meaningfully in conversations. By maintaining eye contact, individuals show that they are actively listening and paying attention to the other person's thoughts and feelings.

This, in turn, helps to build trust and understanding between individuals. Furthermore, eye contact is a sign of respect, as it indicates that one is genuinely interested in what the other person has to say. In summary, Sabrina believed that eye contact is a crucial element in fostering meaningful, respectful, and effective communication between people.

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How do the characteristics of an ecoregion help to determine what type of weathering, erosion, or deposition that will occur?

Answers

An ecoregion is a large area that covers ecosystems having similar characteristics ecologically and geographically. It has a characteristic range in terms of climatic parameters such as temperature, humidity and precipitation.

There are various characteristics that help the determination of weathering, erosion and deposition.

Presence of plants and vegetation minimse the erosion in thagt area and the weathering of rocks.

Marine ecoregions would have more weathering of rocks due to thef low of water and thus, there would be less deposition of organic and inorganic material.

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Ribosomes are tiny factories within cells that do all of the following EXCEPT

A. decode an mRNA message into a protein
B. assemble amino acids into polypeptide chains
C.attach to mRNA molecules in the cytoplasm
D. translate DNA into RNA​

Answers

Answer:

d. translate DNA into RNA

Explanation:

An RNA polymerase binds to promoters and then breaks down hydrogen bonds between two strands of the DNA and attaches on one of them. A DNA strand is used as a template for a new RNA molecule. In this way, pre-mRNA is made, which becomes mRNA after the introns are removed.

A mRNA molecule enters the ribosomes, located in the cytoplasm. In these organelles, a transfer RNA attaches to a mRNA and the process of translation begins. The final product is a polypeptide chain.

The Ribosomes should be considered for small factories within cells that does not involved the translate DNA into RNA

What is RNA?

The polymerase binded for promoters and then split down hydrogen bonds that lies between 2 strands of the DNA and then attached one of them.

The DNA strand should be used like the template for the new RNA molecule. Also, the mRNA should be made that becomes mRNA when introns should be removed.

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Which of the following best describes a benefit of studying biology.
a. One is able to experiment on a variety of animals.

b. One is able to intelligently debate issues such as cloning.

c. One is able to preserve the animals that are extinct.

d. One is able to understand the causes of changes in weather.

Answers

Answer:

The statement that best describes the benefit of studying biology is the ability to intelligently debate issues such as cloning.

Explanation:

Biology encompasses the study of all known forms of life, including their anatomy, organization, functioning and interactions.

One of the advantages of the knowledge acquired through biology is to be able to participate in works and discussions involving subjects related to living beings, including cloning.

The other options are not correct because:

    a and c. The ability to experiment on animals or preserve animals that are extinct is reserved for scientists with a deep knowledge of biology and its fields.

    d. Understanding the causes of wheather change does not correspond to knowledge in biology

How does gravity affect celestial interactions?

Answers

Answer:

Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit. It makes it possible to use human-made satellites and to go to and return from the Moon

100 POINTS !
Match the numbers on the picture of the cell with the words below.

Cytoplasm
Golgi Apparatus
Nuclear Pores
Rough Endoplasmic Reticulum
Vacuole
Cell Membrane
Ribosome
Nucleus
Nucleolus
Smooth Endoplasmic Reticulum
Chloroplast
Chromatin
Mitochondria
Nuclear Envelope
Microtubule
Cell Wall

100 POINTS !Match the numbers on the picture of the cell with the words below.CytoplasmGolgi ApparatusNuclear

Answers

Answer:

1. Nucleus

2. Nuclear Envelope  

3. Nucleolus

4. Chromatin

5. Nuclear Pores

6. Ribosome

7. I don't know sorry

8. Smooth Endoplasmic Reticulum

9. Cytoplasm

10. I don't know sorry

11. Cell wall?

12. Mitochondria

13. I don't know sorry

14. Rough Endoplasmic Reticulum

15. Ribosome?

16. I don't know sorry

Explanation:

I don't know some of these but I hope this helps! :D

Which minerals and gems are commonly mined in the Tropical North?
A. diamonds
B. rubies
C. emeralds
D. bauxite

Answers

Answer:

emeralds

Explanation:

because its very tropical like trees

Answer:

Hi, There!

Which minerals and gems are commonly mined in the Tropical North?

A. diamonds

C. emeralds

D. bauxite

Those are the correct Answers! :)

xXxAnimexXx

have a great day!

how do salt marshes play a role in the trophic pyramid?​

Answers

Answer: Salt marshes protect shorelines from erosion by buffering wave action and trapping sediments. They reduce flooding by slowing and absorbing rainwater and protect water quality by filtering runoff, and by metabolizing excess nutrients

Explanation:

WHOEVER RESPONDS FIRST WILL BE MARKED BEST.
The allele for red tomatoes (R) is dominant over the allele for yellow tomatoes (r). A farmer crosses a red tomato plant with a yellow tomato plant, and only red tomato plants are produced
Which of the following explains why no yellow tomato plants were produced?
A. Plants near the parent plants prevented the growth of yellow tomatoes.
B. Alleles for both red and yellow tomatoes were passed from the parent plants to the offspring, but only red was expressed.
C. The soil in which the parent plants grew prevented the growth of yellow tomatoes.
D. Only the allele for red tomatoes was passed down from the parent plants to the offspring, so that was the only color expressed.

Answers

Answer:

B.

The red allele is a parent allele, and capital R also represents a dominant allele. Lowercase r is recessive, meaning it will not be the dominant allele color. So for this, I would pick B. because it's not that there aren't any yellow tomato genes being passed down, it's that they are recessive meaning they will not make the tomato yellow.

The answer to your question is B.

This law states that in an undisturbed rock sequenceThe oldest layers are on the bottom and each successive layer is younger than the one underneath it

Answers

Law of superposition

Which process turns glucose into energy?

Breathing
Cell division
Cellular respiration
Photosynthesis

Answers

Answer:

cellular respiration

Explanation:

cellular respiration

Name two monomers present in one molecule of the disaccharide sucrose​

Answers

The two monomers present in one molecule of disaccharide sucrose is composed of the monomers glucose and fructose.

dna polymerase iii ""reads"" a template strand and synthesizes a complementary strand of dna in the ________ to __________ direction

Answers

DNA polymerase III reads a template strand and synthesizes a complementary strand of DNA in the 5' to 3' direction.

DNA polymerase III is an enzyme involved in DNA replication, responsible for synthesizing a new DNA strand during the replication process. It reads a template strand, which serves as a guide, and generates a complementary strand by adding nucleotides in a specific direction. The directionality of DNA synthesis is crucial for accurate replication.

The direction in which DNA polymerase III synthesizes the new strand is referred to as the 5' to 3' direction. This means that the enzyme adds nucleotides to the growing DNA chain starting from the 5' end (where the phosphate group is attached to the 5' carbon of the sugar) and moving towards the 3' end (where the hydroxyl group is attached to the 3' carbon of the sugar). The template strand acts as a template for complementary base pairing, guiding the synthesis of the new strand.

This 5' to 3' directionality is a fundamental aspect of DNA replication. It ensures that the new DNA strand is synthesized in the correct sequence, complementary to the template strand. Additionally, DNA polymerase III can only add nucleotides to the 3' end of an existing DNA or RNA strand, requiring a primer to initiate replication. This primer provides the necessary 3' hydroxyl group for nucleotide addition.

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Which nucleotide pairing(s) would be recognized by the MMR system during DNA replication?
I. dTMP and dCMP
II. dGMP and dAMP
III. dAMP and dTMP
A) I only
B) III only
C) I and II only
D) I, II, and III

Answers

The MMR (mismatch repair) system is responsible for correcting errors that may occur during DNA replication. It identifies mismatches between the two strands of DNA and corrects them by excising the incorrect base(s) and replacing them with the correct one(s).

The correct nucleotide pairing recognized by the MMR system during DNA replication are:

dTMP and dAMPdGMP and dCMP

Therefore, option C (I and II only) is the correct answer. Option III (dAMP and dTMP) is incorrect because the correct pairing is dTMP and dAMP, as mentioned above. Option A (I only) and option D (I, II, and III) are also incorrect.

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PLEASE ITS DUE SOON!!!

Draw a line graph of the squirrel population data from year 1 to year 10.

PLEASE ITS DUE SOON!!!Draw a line graph of the squirrel population data from year 1 to year 10.
PLEASE ITS DUE SOON!!!Draw a line graph of the squirrel population data from year 1 to year 10.

Answers

I don’t have access to paper but it’s super easy, with graph in front of you you want to label you bottom row 1-10 if there are more places just keep counting. For the y axis label (from bottom to top) intervals of 100, do this till 2000, then place your dots in sorta the right place.

TO INVESTIGATE AND COMPARE THE MOVEMENT OF TWO NAMED JOINTS IN THE HUMAN BODY

Answers

Answer:

tendons and knees

Explanation:

the tendons are in the fingers, and they move to allow various actions such as holding things. the knees, allow us to walk, and join the forelegs and legs. their movement is different and they allow various actions, however, both are important.

consider the following dna sequence, which codes for the first portion of a long protein beginning at the atg (aug in mrna) start codon. 5' atg ccc cgc agt agg ggg tgg aga3' a mutation occurs changing this sequence to: 5' atg ccc cgc agt agg ggg tga aga3' what type of mutation is this? (check all that apply.)

Answers

The appropriate responses are: 1. Point mutation 2. Transition 3. missense mutation.t The seventh codon is where the mutation is happening in this case. The first scenario it is TGG that codes for Tryptophan. Then, it is mutated to TGA that codes for Stop codon ( in bacteria) which terminates the process of protein translation.

What is mutation?

The nucleotide sequence of an organism's genome, that of a virus, extrachromosomal DNA, or other genetic components can change permanently, a process known as mutation.

Gene structural changes can be divided into two categories: small-scale changes and large-scale changes.

Gene mutations that impact only one or a few nucleotides in a tiny gene are known as small-scale mutations. Examples include:

Point mutations

When a mutation affects one or more nucleotides in the same gene, it is considered to be punctual.

Substitution mutations:

Missense mutations: A nucleotide is changed by another as a result of this point mutation. In some circumstances, this alteration results in a change in the amino acid encoded, which may or may not affect the function of the protein generated by the gene in the case of a gene encoding change or the affinity for a transcription factor in the case of a promoter region of the DNA.

Nonsense mutation: In this case, the changed DNA sequence prematurely instructs the cell to stop producing proteins rather than replacing one amino acid for another. A truncated protein produced by this kind of mutation may operate incorrectly or not at all.

Due to genetic code redundancy (the new triplet codes for the same amino acid as the original triplet), or because it affects a region of the DNA that does not code for a protein, such as an intron, silent mutations do not change the sequence of a protein.

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Eric is hanging a rectangle mirror that has a diagonal of 47 inches with an angle of depression of 60°. How many square inches is the mirror? (round to nearest tenth)

A) 956. 5 in2

B) 1,104. 5 in2

C) 1,365. 5 in2

D) 1795. 5 in2

Answers

Given that Eric is hanging a rectangle mirror that has a diagonal of 47 inches with an angle of depression of 60°. We are supposed to calculate the area of the mirror.

Let's draw the diagram for this question:From the diagram we can see that the given rectangle is being divided into two right \(triangles\). And the given angle is the angle of depression which can be written as the angle of elevation of the person who is standing on the ground. The diagonal of the rectangle can be calculated as follows: If we consider a right triangle, one leg of the triangle is the length of the rectangle and the other leg is the width of the rectangle. And the diagonal of the rectangle is the hypotenuse of the right triangle using Pythagoras theorem we get:

Width2 + Length2 = Diagonal2Length2 = Diagonal2 - Width2Length = √(47² - 36²)Length = √(2209 - 1296)Length = √913Length = 30.19 inches Let's calculate the height of the rectangle: If we consider the right triangle with the angle of 60 degrees, the opposite side to the angle of 60 degrees is the height of the rectangle. And we have hypotenuse and we can use trigonometry formula to find the height.Height = Hypotenuse * sin(60)Height = 47 * sin(60)Height = 47 * 0.866Height = 40.75 inchesNow, we can calculate the area of the rectangle using the following formula: Area = length * widthArea = 30.19 * 40.75Area = 1231.2425 inches^2

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Describe two ways effects on society can impact the decision of whether to mine for resources in certain areas.

Answers

In the certain area that people are looking to mine,it may have lots of people. If there a lots of people,and there is an explosion in the mine,lots of deaths would happen. If there was people with lots of sickness,or a huge hospital in the town this would be bad,because they would be spreading possibly toxic and lethal chemicals inside of the town and killing off all of the people. Truly the main reason for society impacting this is health and money. It may be expensive in this area.

Hope this helped!

-Nea

There may be a large number of people in the area where people want to mine. There will be many deaths if there are many people and there is an explosion in the mine.

What is mining?

Mining is the extraction of useful materials from the earth. Coal, gold, and iron ore are some examples of mined materials. Iron ore is the raw material used to make the metal iron.

Mine exploration, construction, operation, and maintenance may result in land-use change and have negative environmental consequences such as deforestation, deterioration, contamination.

Also, the modification of soil profiles, contamination of local streams and waterways, and an increase in noise and dust.

There could be a large population in the area where people want to mine. If there are a lot of people and there is an explosion in the mine, there will be a lot of deaths.

Thus, this way, effects on society can impact the decision of whether to mine for resources in certain areas.

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Which of the following is true about the principle of the conversation of mass?

Answers

Answer:

figure it out by urself loser thanks for the points

what is a gene
A. A series of DNA molecules.
B. A segment of protein.
C. A series of amino acids.
D. A segment of DNA molecule.

Answers

Answer:

D. A segment of DNA molecule

Explanation:

Gene is a segment of a DNA molecule that holds instruction needed for the synthesis of useful products (protein). Ideally, DNA is the storage material of genetic information in a cell. The DNA harbors the GENE, which itself is being expressed in order to use the information contained in it to produce useful products responsible for the phenotype of an organism.

A gene contains sequences made up of nucleotide bases that determines the sequence of amino acids to be produced, and ultimately the type of protein.

Answer:

A segment of DNA molecule

Explanation:

A researcher is trying to estimate how many trout there are in a 1,000-acre lake. She counted the trout in three 50-acre areas and recorded 88, 80, and 57 trout. What is the approximate size of the trout population?

Answers

The approximate size of the population of trout in the 1,000-acre lake would be 1460 trout.

Estimation of population size

The total area of the lake covered by the population is 1,000 acres. Three 50-acre area were sampled and the results were as follows:

Sample 1: 88 trouts per 50-acre

Sample 2: 80 trouts per 50-acre

Sample 3: 57 trouts per 50-acre

The average number of trouts per 50-acre of the lake can then be estimated as:

88+80+51/3 = 73 trouts per 50 acres

If the average number of trouts per 50-acre is 73, the population size of trout in the 1,000-acre can be estimated as follows:

50 acre = 73 trouts

1000 acre = 73 x 1000/50

                 = 1469 trouts.

In other words, the approximate population size of the trout in the lake is 1460 trout.

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In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?

A. stratosphere
B. asthenosphere
C. magnetosphere
D. lithosphere​

Answers

Answer:B

Explanation:The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth's surface. The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten.

Whale primary functions

Answers

The primary functions of whales include feeding, reproduction, communication, and migration.

Whales are primarily filter feeders or predators, depending on the species.

Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.

Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.

Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.

The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.

Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.

Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.

Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.

These migrations are driven by seasonal changes in food availability and environmental conditions.

In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.

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__________ are fairly small organelles that provide a safe place within the cell to carry out certain biochemical reactions that generate harmful, highly reactive oxygen species. These chemicals are both generated and broken down in the same location.a) Lysosomesb) Endosomesc) Peroxisomesd) Nucleosomes

Answers

Peroxisomes is the fairly small organelles that provide a safe place within the cell.

Which of these is an example of an independent
variable and its effect on a dependent variable?
A. age and race
B. burgers and hotdogs
C. the Sun and the temperature outside
D. cooking at home and ordering takeout

Answers

The independent variable is the one that causes a response in the dependent variable. Option C. the Sun and the temperature outside

What is an independent variable?

Refers to all the variables in an experiment that provoke a response in another variable.

An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable.

What is a dependent variable?

Refers to the variable, which response depends on any change in the independent variable.

It represents a quantity of something whose value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable.

In the exposed example, the correct option is C. the Sun and the temperature outside.

The Sun ⇒ Independent variable ⇒ According to how its proximity fluctuates it provoke a temperature change.

Temperature ⇒ Dependent variable ⇒ It depends on the Sun

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what is the difference in height between low tide and high tide on wednesday

Answers

Answer:

The high tide is an ocean wave rising regularly and the low tide is the ocean wave falling regularly.

Explanation:

(Not sure what you meant by "on Wednesday".)

natural selection acts on

Answers

Answer:

Natural selection acts on a organism's phenotype or observable features.

Explanation:

Hope this helped Mark BRAINLIEST!!

which part of the vestibular system starts to respond as you move your head from an upright position to a horizontal position (like a pillow)?

Answers

Answer: The utricle is most sensitive to tilt when the head is upright. The saccule is most sensitive to tilt when the head is horizontal. Unlike the semicircular ducts, the kinocilia of hair cells in the maculae are NOT oriented in a consistent direction.

Explanation:

The part of the vestibular system that starts to respond as you move your head from an upright position to a horizontal position (like a pillow) is the utricle.

The vestibular system is a crucial component of the human body that is responsible for detecting head movements and changes in the orientation of the body in space. The system comprises two main components, the semicircular canals and the otolith organs, each of which performs distinct functions. The otolith organs, which include the saccule and utricle, detect changes in linear acceleration and gravity.

The utricle, in particular, is responsible for detecting changes in the horizontal plane, whereas the saccule detects changes in the vertical plane. As you move your head from an upright position to a horizontal position, the otolith organs in the vestibular system start to respond, with the utricle being the first to detect the change. This detection is essential as it enables the body to maintain balance and equilibrium. Therefore, the utricle plays a critical role in the body's ability to sense and adjust to changes in orientation.

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