A new microbiology student failed to properly sterilize the pipet between creating E. coli and S. epidermidis cultures from the tablets in the lab kit. How would this mistake be recognized when the mixed culture is streak plated

Answers

Answer 1

With this error, the culture medium can be visualized with two different types of bacteria, with different stains.

In addition to staining in culture medium, what are the differences?

Escherichia coli, or E. coli, is a bacterium that naturally inhabits the intestines of people and some animals, without any signs of illness.

Staphylococcus epidermidis is a Gram positive, coagulase negative bacterium that is part of our normal flora. The microorganism colonizes human skin and mucous membranes, notably moist surfaces such as armpits, nostrils, etc.

With this information, we can conclude that this error, the culture medium can be visualized with two different types of bacteria, with different stains.

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Related Questions

What is the name of the protein found in frozen yogurt and ice cream?

Answers

Answer:

Whey protein.

These proteins help you gain strength, and healthy fats.

__________________________________________________________

Questions?

Ask in comments box.

What do you think is one of the factors that could affect the population of the monarch butterflies in Mexico

Answers

Answer:

climate change

Explanation:

the deforestation of habitat in mexico, and the loss of native plants in the us that monarchs rely on to feed and reproduce.

Ways to reduce carbon dioxide in the air/atmosphere

Answers

Answer:

1) Forests. ...

2) Farms. ...

3) Bio-energy with Carbon Capture and Storage (BECCS) ...

4) Direct Air Capture. ...

5) Carbon Mineralization. ...

6) Ocean-based Concepts. ...

The Future of Carbon Removal.

Explanation:

these are six ways that you can reduce carbon dioxide in the air/atmosphere!

Classify each of the statements and hormone interactions with the appropriate interactive effect.

Answers

The missing statements and hormone interactions are:

One hormone opposes the action of another.The effects of insulin and glucagon on blood glucose levelsOne hormone enhances the target organ's response to the second hormone that is secreted later.The effects of estrogen and progesterone on the uterus.The effects of FSH and testosterone on sperm production.Two or more hormones act together to produce an effect that is greater then the sum of their separate effects.

AntagonisticOne hormone opposes the action of another.The effects of insulin and glucagon on blood glucose levels.

PermissiveOne hormone enhances the target organ's response to the second hormone that is secreted later.The effects of estrogen and progesterone on the uterus.

SynergisticThe effects of FSH and testosterone on sperm production.Two or more hormones act together to produce an effect that is greater then the sum of their separate effects.

What kind of interactive effects do hormones have?

Hormones have three ways of interaction that affects how a cell can give.

Antagonistic

One hormone has the opposite effect of another one. For example, when glucose levels are high, our body releases insuline so that our body can store it for later. However, when glucose levels are low, our body releases glucagon to release the storaged glocose.

Permissive

The release of one hormone allows the second one to act in a different organ. For example, the hypothalamus releasing TRH, which affects the hypofisis releasing TSH, and his hone affects the tyrod gland, which will produce T4 and T3.

Synergistic

It is an effect that happens when two hormones with a similar effect act together, amplifying their effect. For example, the increasing levels of testosterone and FSH together allow for sperm production.

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What characteristics do you expect to observe with a microscope if you investigate the division of mitochondria and chloroplasts in eukaryotic cells

Answers

The characteristics of mitochondria is that it has an oval shape bounded by double membrane while chloroplast have a green color.

What are Organelles?

These are vital parts of the cell as they perform various functions required for the survival of the organism.

The mitochondrion has an oval shape while chloroplasts are green due to the presence of the green pigment known as chlorophyll which is used for photosynthesis.

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Consider this animal cell.

The organelles in an animal cell are labeled. Part D are stacked tubular structures.

Which organelles are labeled D, and what is one feature that distinguishes them from the other labeled organelles?
chloroplasts; the only organelles that produce sugars from sunlight
ribosomes; only found in animal and bacterial cells
centrioles; found in animal cells but not plant cells
mitochondria; the only energy-generating structures found in cells

Answers

I believe the answer is D.

Which part of the plant contains the most chlorophyll?.

Answers

Answer:

The palisade layer

The palisade layer contains the most chloroplasts as it's far close to the pinnacle of the leaf. The chloroplasts comprise the pigment chlorophyll. The palisade cells are organized upright.

A metamorphic rock interacts with the layers of Earth and melts because of extreme heat and pressure. Which of these is most likely formed when the molten rock cools?

Answers

Answer:

When granite is subjected to intense heat and pressure, it changes into a metamorphic rock called gneiss. Slate is another common metamorphic rock that forms from shale. Limestone, a sedimentary rock, will change into the metamorphic rock marble if the right conditions are met.

Energy for use in our cells are stored in the form of

1) chemical bond energy
2) physical energy
3) heat energy
4) mechanical energy

Answers

Answer:chemical bond energy

Explanation:weegy

If the snake were removed from the ecosystem, which organism would immediately be impacted? (6b)

A.
The mouse population would increase because one of their predators was removed.

B.
The rabbit population would increase because one of their predators was removed.

C.
The mouse population would increase because they have less competition.

D.
The rabbit population would increase because they have less competition.

Answers

Answer:

A or B

Explanation:

What ever is right under the snake in the food chain.

Which level of taxonomy is the largest and most inclusive? Group of answer choices phylum Domain species order

Answers

Answer:

Domain

Explanation:

The order of classification is like this (from biggest to smallest):

Domain -> Kingdom -> Phylum -> Class -> Order -> Family -> Genus  -> Species

Hope this helped!

The cranial nerve responsible for movement of the medial rectus, superior rectus, inferior rectus and inferior oblique eye muscles is the ________ nerve.

Answers

Answer: This is the oculomotor nerve.

I hope this helps!


1. Predict: What do you think the offspring of a black mouse and a white mouse will look like?

Answers

A lighter black known as brown

The fibrocartilage pad between the medial condyle of the femur and the medial condyle of the tibia is called the __________.

Answers

Medial meniscus are fibrocartilage attached to the tibial collateral ligament, that is, between the medial condyle of the femur and the medial condyle of the tibia.

What is medial meniscus?

It is an articular fibrocartilage that extends medially across the knee joint, where it attaches to the tibia anterior to the insertion of the anterior cruciate ligament.

This in the middle zone has continuity with the deep portion of the medial ligament, being well attached to the tibia and femur and acting as a cushion and distributing the weight of the femur.

Therefore, we can conclude that the medial meniscus are fibrocartilage attached to the tibial collateral ligament, that is, between the medial condyle of the femur and the medial condyle of the tibia.

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PLEASE HELP I NEED THIS DONE!!!! 60 POINTS!!!!

Answers

Answer:

Below

Explanation:

1. Sedimentary rock

2. Metamorphic rock

3. Magma

4. Igneous rock

5. Weathering and Erosion Ign.

6. Weathering and Erosion Met.

7.Weathering and Erosion Sed

8. Compaction and Sedimentation.

9. Heat and pressure Sed.

10. Heat and pressure Ig

11. Melting

1. Sedimentary Rock

2. Metamorphic Rock

3. Magma

4. Igneous Rock

5. Weathering & Erosion (Ig)

6. Weathering & Erosion (Met)

7. Weathering & Erosion (Sed)

8. Compaction & Cementation

9. Heat & Pressure (Sed)

10. Heat & Pressure (Ig)

11. Melting

12. Cooling & Hardening

Hope this helps!

An element that can bioaccumulate and
lead to biomagnification is
A. hydrogen
B. oxygen
C. argon
D. mercury

Answers

Explanation:

OPTION (D) IS CORRECT

An element that can bioaccumulate and

lead to biomagnification is "MERCURY "

[tex] \large \sf \pmb{D) \: Mercury}[/tex]

An element that can bioaccumulate andlead to biomagnification is Mercury

What is Mercury with Explanation?

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What is Planet Mercury?

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The table lists some organelles and functions. Only one pair is correctly matched.

Functions of Organelles
Organelle Function
Nucleus Directs cell activity
Endoplasmic reticulum Breaks down sugar molecules to supply energy
Golgi apparatus Supports and protects organelles in the cell
Lysosome Produces proteins for the cell

Which organelle in the table is correctly matched with its function?
nucleus
endoplasmic reticulum
Golgi apparatus
lysosome

Answers

Nucleus directs cell activity.

The function and the nucleus are appropriately matched. The nucleus, which serves as the cell's command centre, controls every activity. DNA and RNA, which make up genetic material, are in charge of encoding the instructions necessary for the cell to carry out its duties.

What happens in the case of nucleus in the cell division ?

In addition to directing the replication of genetic material and the generation of new cells, the nucleus is involved in cell division. Additionally, the endoplasmic reticulum is well suited to its function.

A network of interconnecting tubes and sacs called the endoplasmic reticulum is in charge of the synthesis, processing, and movement of proteins and other chemicals inside of the cell. In order to provide the cell energy, it also breaks down sugar molecules.

The function of the Golgi apparatus is appropriately matched. The sorting, processing, and packaging of proteins and other molecules is carried out by the Golgi apparatus, a network of flattened sacs and tubes. By giving the organelles a protective covering, it also helps to sustain and safeguard the organelles within the cell.

The function of the lysosome is mismatched with it. The digestive enzymes in the lysosome, a membrane-bound organelle, are in charge of dissolving and recycling cellular waste and damaged organelles. It doesn't make cell-specific proteins.

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What is the correct order of structures that a piece of food would encounter as it travels through the alimentary canal of a bald eagle?.

Answers

The correct order of structures is mouth, oesophagus, crop, stomach(proventriculus), gizzard, intestine, and anus.

The digestive tract of birds

The digestive tract of birds starts from the mouth and ends at the anus.

As the food enters the oesophagus through the mouth, it is pushed down to the first stomach called the proventriculus.

Hydrochloric acid, mucus and a digestive enzyme, pepsin, are secreted by specialized cells in the proventriculus and start the process of breaking down the structure of the food material.

Food substances that are hard to digest are transferred to the gizzard. Nutrients are absorbed in the intestines and undigested food substances are removed through the anus.

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Brown coat color rabbits possess the dominant allele B, and white coat color rabbits possess the recessive allele b. If the frequency of the allele for white coat color is 0.04, what is the frequency of the dominant allele in the population?

Answers

Assuming Hardy-Weinberg equilbrium, we have

p + q = 1

where p = frequency of dominant allele and q = frequency of recessive allele. So

p = 1 - q = 1 - 0.04 = 0.96

Consequently we have

• p² = 0.9216 = frequency of hom ozygous domininant genotype

• pq = 0.0768 = frequency of heterozygous genotype

• q² = 0.0016 = frequency of hom ozygous recessive genotype

since

p² + 2pq + q² = 1

Which of these are examples of how bacteria are beneficial? (Select all that apply.)
1. They can cause disease.
2. They help us digest food.
3. They are used to add flavor to some foods.
4. They change milk into cheese.

Answers

Answer:

The bacteria in our bodies help degrade the food we eat, help make nutrients available to us and neutralize toxins, to name a few examples[8]; [9]; [10]. Also, the microbiota play an essential role in the defense against infections by protecting the colonized surfaces from invading pathogens.

Explanation:

hope this helps

1. They can cause disease.

2. They help us digest food.

3. They are used to add flavor to some foods.

4. They change milk into cheese.

Explanation:

answers.

2

3

4


What would happen if the concentrations of carbon dioxide and methane rose too high?

Answers

Answer:

I'm assuming this means concentrations of the atmosphere*

Explanation:

Carbon dioxide are both considered greenhouse gasses. This means whenever they are in the atmosphere, they absorb heat from the sun and trap it within the atmosphere. In general, greenhouse gasses are a good thing. They trap heat in the Earth during nighttime so we do not freeze when we don't have the sun. However, since the Industrial revolution, the overuse of fossil fuels which are made of carbon and sometimes have high methane concentrations have lead to an excess amount of these gasses in our atmosphere. If concentrations become too high, the Earth's climate will continue to display higher average temperatures, leading to a complete change in our environments as once glacial areas will begin to display more temperate climates, and temperate and warm climates will become even hotter. Ecosystems in every area will be severely damaged, with many species likely facing extinction. Additionally, sea levels will rise much higher, both due to the melting of glaciers into the ocean and also because warmer climates will make the ocean warmer, meaning the molecules of water will spread farther apart and increase the volume of the ocean.

How does the diagram depicting the evolution of the eohippus into the modern day horse include
transitional forms?

Answers

The diagram depicted the evolution of the eohippus into the modern day horse through the presence of hooves etc.

What is Transitional  fossil?

This is defined as the fossil which exhibits the characteristics of both ancestral and derived forms.

In the evolution of the eohippus into the modern day horse, the transitional forms include :

Presence of hooves.Presence of muzzle etc.

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How long ago did the first animals adapt to living on land?.

Answers

Answer:

440 - 410 million years ago

Explanation:

Whatever their origins, animals may have ventured onto land early in the Cambrian. Previously scientists believed that animals did not begin to colonise the land until the Silurian (440 - 410 million years ago).

A patch of flowers was exposed to a harmful pesticide. Identify and explain which organelle(s) would
be heavily involved in providing the plants' cells with protection.

Answers

Answer:

plasma membrane?

Explanation:

The function of plasma membrane is seperating the contains from outer environment?

In a sensory pathway, which neuron detects the stimulus and transmits the signal to the spinal cord or brainstem

Answers

Answer:

Afferent neurons.

Explanation:

because in the dorsal roots carry impulses from the body's sensory receptors to the spinal cord where the information begins to be processed and because The ventral horns contain efferent motor neurons which control the body's periphery.

Which portion of a neuron receives a signal from a receptor or other neurons?.

Answers

Answer:

Dendrites - specialized to receive neuronal signals.

The set of alleles an organism has for a particular trait is what ____

Answers

Answer:

i would help you with your work but i dont know how ro do it myself

Explanation:

im so sorry

L Pretest: Unit 1
Question 14 of 30
Which technology can environmental scientists use to follow animals that
have been fitted with electronic collars?
A. Environmental DNA (eDNA) surveillance
OB. Global positioning systems (GPS)
OC. Geographic information systems (GIS)
OD. Unmanned aerial systems (UAS)
SUBMIT

Answers

OB. Global positioning systems (GPS)

The Global Positioning System (GPS) is used by environmental scientists to monitor the movements of polar bears and other sensitive populations. So, the correct option is B.

What is Global Positioning System?

A satellite-based radio navigation network owned by the US government and run by the US Space Force is known as the Global Positioning System, or Navstar GPS. A GPS is a global satellite navigation system that can be used for tracking, navigating, and other purposes.

In today's world, GPS is a necessity, and if someone gets lost, their cell phone's GPS can assist us locate them. Environmental scientists use GPS to follow polar bears and other fragile animals in a similar way. Certain GPS receivers have a precision of one centimetre, allowing them to pinpoint their location (0.4 inches). Location is provided by GPS devices in terms of latitude, longitude, and altitude.

Therefore, the correct option is B

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How does resource availability, such as water, drive competition?

Answers

Answer:

If there was less water, then there would be more competition, since now a population has to live off of a little bit of water. Similarly, a lot of water would result in less competition, since now the water will basically be more available, and not something that two animals might have to fight over.

Are heated air and wind shear the cause for severe storms? Explain.

Answers

Answer:

Yes, they are very much the main cause of severe storms because the heat molecules get into the atmosphere and clouds, causing chemical reactions and damage. At some point in time, the energy built up, as well as the damage done, must undo itself. This is done through a storm. It is the environment's way of cleaning itself.

As a part from this video below states, wind shear is a leading cause in severe storms.

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