Students in a biology class were discussing outbreaks of food-borne illness. Modern practices of refrigeration are aimed at curbing (limiting) these bacteria. They wanted to know exactly what happened to bacterial colony growth at varying temperatures. The teacher explained that scientists study bacteria in the laboratory by counting colonies that grow on plates filled with agar, which is a nutrient substance. “Design” an appropriate experiment that would test the effect of temperature on bacterial growth. You would have a period of 5 days to conduct an experiment.

Answers

Answer 1

Answer:

I know this isn't a big help answer, but you could use it as a start. You could say something like "I tested it in multiple different temps. including .... (any temps. you want) Then say how all of thoose different temps. changed the bacteria." I hope it helped! :)

Explanation:

Answer 2

Most of the foodborne diseases are caused by those bacteria that can grow well and infect food at normal temperatures, and their population can be controlled by lowering the temperature or raising the temperature too high, which can degrade their cell walls.

What is the effect of temperature on the bacteria?

There are numerous bacteria that can infect food and cause foodborne disease when consumed by humans, resulting in diarrhea, stomach aches, and other symptoms. Because most of these bacteria grow at room temperature, keeping food at that temperature degrades it faster, so foods are kept and stored in the refrigerator. This low temperature keeps the cellular activity of bacteria low; as a result, the bacteria cannot produce toxins or grow their population.

Due to this, the refrigerator stores the food for a longer time. Different strains can be kept and stored at different temperatures on an agar plate, but a strain present at a low temperature will produce far fewer colonies than one present at a room temperature. Further the growth depends upon the types of bacteria.

Hence, by refrigerating the food, cellular activity is seized and controlled.

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Related Questions

What is an easy way to calculateThe amount of energy available at each trophic level

Answers

Answer:

To complete this calculation, we divide the amount from the higher trophic level by the amount from the lower trophic level and multiply by one hundred. That is, we divide the smaller number by the bigger one (and multiply by one hundred).

Explanation:

I hope this helps you as this is the only information I got from my teacher

the star day is shorter than the sun day by how many minutes?

Answers

Answer:

4 minutes

I hope this helps!

ok for my first question i'll keep it simple how many bones are in a dogs body?

Answers

Answer:

319 bones are in a dog's body

Answer:

319

Explanation:

Explain how a major flooding event could impact more than one sphere. What
spheres would be involved and in what way

Answers

Answer:

well... since i know everything, i would say that this is bad because people can drown and we do not want people to die before they can vote.

The description of a cell organelle is given below.

found in animal and plant cells
breaks down food molecules
makes ATP

What organelle is being described?

mitochondria
lysosomes
chloroplasts
ribosomes

Answers

mitochondria

hope this helps

Answer: mitochondria

if the answer is entriguing enough ill give brainliest
What is the meaing of life?

Answers

The actual meaning of life is to fulfill your purpose in life and accomplish your goals. What I mean by this is, everyone has a purpose, of why they are living. None of us will be here if we all didn't have a purpose

The meaning of life 42. Read Hitchhiker’s Guide to the Galaxy. You’ll see.

Can someone help me i got very confused

Answers

Answer:

D. student 4

Explanation:

I personally find this question slightly bewildering. It does definitely make you think. I decided your best answer choice would be D, because a dog wouldn't always be there, or the weeds.

Describe the four major spheres that support life on Earth.
Explain how rays AB and AC form both a line and an angle.

Answers

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

Two rays AB and AC having the same endpoint are opposite rays if they two rays are unequal but line AB is equal to line AC. Otherwise they are nonopposite. An angle is the union to two nonopposite rays AB and AC sharing the same endpoint. The angle is denoted by either angle BAC or angle CAB.

If you have a container with hydrogen atoms and oxygen atoms in it do you automatically have water?

Answers

Answer:

no

Explanation:

you have to have the right amount and the right situation for it to turn into water. for instance The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.

What happens to blood once oxygen hits and why?

Answers

Answer:it changes colour

Explanation:

When blood passes through the lungs, the hemoglobin absorbs oxygen from the air we breathe and turns bright red. Our heart then pumps this blood all over the body. When it reaches its destination, the oxygen is released from the hemoglobin, and the hemoglobin turns a darker red-brown.

i will mark as Brainliest if answered

Answers

Answer:

5.e glycerol and fatty acids

6.a C:H:O

You can Mark the other guy brianliesy

Which of the following molecules supplies the main source of short-term energy used in cellular
respiration?
F) Enzymes
G) Carbohydrates
H) Lipids
J) Proteins

Answers

Answer:

g

Explanation:

its g because thats right may i have brainlyist i need it to upgrade

The molecules supply the main source of short-term energy used in cellular respiration is - G) carbohydrates.

All living organisms carry out cellular respiration in order to get energy for cellular processes. All biomolecules proteins, lipids, and carbohydrates provide energy by breaking down during this process. however, sugar molecules or carbohydrates are used to provide short-term and immediate energy in the form of ATP by cellular respiration.

Proteins -

During extreme starvation when all carbohydrates and fats in the body are used up.The respiratory quotient (RQ) of proteins - 0.83–0.9.

Carbohydrates-

The major respiratory substrate is in form of glucose or carbohydrates in cells.The respiratory quotient (RQ) of carbohydrates - 1.

Fats-

used only if carbohydrates are in short supply. It yields almost twice as much energy as carbohydrates generally do not use.The respiratory quotient (RQ) - 0.71

Thus, carbohydrates like glucose and sucrose are probably the two most common organic molecules that organisms require to produce short-term energy from cellular respiration.

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which is most likely to help an introduced species became invasive? 1. a low reproductive rate 2. big difference between original and new habitats 3. a strong predator in a new habitat 4. great tolerance to a wide range of conditions

Answers

Answer:

4.

Explanation:

with a great tolerance to a wide range of conditions the species would adapt and thrive which would allow it to reproduce and have all it needs to survive, grow, and take over.

Answer:

The correct answer is D. great tolerance to a wide range of conditions

Explanation:

took the test fam

HELP!

Which step was most likely performed by the researcher during the
purification process?
O A. The protein was separated from lipids.
OB. The protein was stabilized using lipids.
C. The protein was separated from nucleic acids.
D. The protein was separated from nucleic acids.

Answers

Answer:

A

Explanation:

When listing the levels of organization in organisms from least complex to most complex, which level is just below organs in complexity? cell organism organ system tissue

Answers

Answer:

Tissue.

Explanation:

Cells work together to make tissues and tissues work together to make organs. I believe tissues are right under organs in terms of complexity.

The level of organization is defined by the simple to complex arrangement. The tissues are below the organs in the level of complexity. Thus, option d is correct.

What is the level of organization?

The arrangement of the most simple to the complex structure in a hierarchical manner is called the level of organization. It makes the population and the community of the ecosystem.

The atom is the most simple level that aggregates to form a molecule that makes a cell. Cells with similar functions make the tissues. The tissues with various fucntions combine to form an organ.

An organ along with different organs makes an organ system. The various organ system with various roles and activities makes the organism. Many organisms make a population that results in a community, ecosystem, and biosphere.

Therefore, option d. the tissues make the organs.

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Which type of compounds dissolve easily in water?

A. Covalent and Nonpolar
B. Nonpolar and ionic
C. Polar and ionic
D. Polar and Nonpolar

Answers

Polar and Ionic compounds

You want to measure the effect of different amounts of oxygen on the rate of yeast growth. What is the independent and dependent variable?

Answers

Answer: depndent the difrent amounts indendent yeast growth

dependent: the different amounts
independent: the rate of the yeast growth

Can't use google! Due in 10 minutes! I will mark you the brainliest!

How does identifying ecological hotspots help maintain biodiversity?

Answers

Answer:

Look below

Explanation:

A region must meet two strict criteria: must have at least 1,500 vascular plants as endemics, and it must have a high percentage of plant life found nowhere else on the planet. A hotspot is irreriplaceable

Prompt 3: Why do you think it is so
important to have producers
(autotrophs), consumers
(heterotrophs), and decomposers
(detritivores) in an ecosystem?

Answers

Answer:

there will have to be something to produce all the food so that other animals can eat

Explanation:

the consumers are important as when they eat they can have a high possibility to not starve to death as they have competition and can reproduce and then there is a possibility that that animal species may not become extinct

also when u eat u decompose so they are inportant as they decompose

as when they decompose they lay fertilisers for the soil in the floor so that other plants can grow amd flourish so the cycle can continue

How many meters per hour did marica run?

Answers

how many meters per hour did marica run ? 12,600

HELP ME

A plate moves south at a rate of 2 cm/year. How many meters south from its original location will the plate be in
4,000 years?
8,000 meters south
04.000 meters south
O 200 meters south
O 80 meters south

Answers

Answer:

8,000 meters south

Explanation:

2 times 4,000

Answer:

80 meters

Explanation:

2cm per year would be 8000 cm in 4000 yearsconvert 8000 cm to meters there are 100cm in a meterso 8000 cm is equal to 80 meters

BIOLOGY please answer ​

Answers

Answer:

the same

Explanation:

I’m going to say 10 grams maybe ? I apologize if I’m wrong but it can’t stay the same.

According to cell theory, what do each of the following organisms have in common?

Answers

Answer:

Hope it helps!!

Explanation:

According to cell theory, what do each of the following organisms have in common? Each organism is able to photosynthesize. They are all made up of the same kinds of atoms. ... Cells are the basic unit of structure for each organism.

Sophie says dolphins and sharks look very similar, so they must be related. Jake disagrees, saying DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos. Who is correct using the modern system of classification?
Sophie is correct because dolphins look more like sharks than like hippos.
Jake is correct because classification is based on evolutionary relationships.
Both are correct because traditional and modern classifications can overlap.
Neither is correct because neither is taking into account both the traditional and modern systems

Answers

According to the modern system of classification, Jake is correct because classification is based on evolutionary relationships. So, the correct option is B.

What do you mean by the modern system of Classification?

The modern system of classification was invented in order to identify the evolutionary relationships between the organisms that could be more accurately depicted.

Shark belongs to the group of fishes, while dolphin belongs to the group of mammals. They are more or less looking very close to each other. But the modern system of classification reveals the differences between the. And DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos.  

Therefore, according to the modern system of classification, Jake is correct because classification is based on evolutionary relationships.

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Answer: b

Explanation:

How is a snail dangerous to cattle?

Answers

Trematode is the infection in farm animal and their culprit is snail’ this damages their liver and this can kill them.

What is a long chain of nucleotides that contains a sugar
molecule, a phosphate group, and a nitrogenous base,
and directs protein product?

Answers

Answer:

RNA

Explanation:

RNA is a single-stranded polymer composed of linked nucleotides made up of a pentose sugar (ribose), a nitrogenous base, and a phosphate group.

RNA is involved in protein synthesis and its regulation.

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Why is it important for molecules to able to travel into and out o your body's cells?

Answers

It’s important there’s molecules that could do so for keeping homeostasis, food movement, keeping the cell isotonic with movement of water, glucose to go into cell to not let it starve and waste to escape and not build up in cell

The function of the transport proteins is to maintain the internal environment of the cell's salt, nutritional, and protein balance within a range that ensures the survival of the cell and the organism.

What is importance of a molecule to move across the cell?

Biology places a great deal of importance on the passage of substances into and out of cells (for example, nutrients into and poisons out), as without it, no cell and hence no organism could survive for very long.

Moving chemicals throughout the body is essential for living cells. Transporting chemicals into and out of cells is necessary.

Examples include oxygen, carbon dioxide, and dissolved food. Active transport, osmosis, and diffusion are used to accomplish this.

Therefore, transport of a molecule into and out  of cell is important to functioning of cell.

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Which is the best example of water regulating an organism’s body temperature? a jogger sweating after a run a fish passing water over its gills a deer taking a drink from a stream a leaf using water for photosynthesis

Answers

Answer: A.  Jogger sweating after a run.

Explanation: I took the quiz. ;)

The best example of water regulating an organism’s body temperature is a fish passing water over its gills, which is the second option, as the fish gill maintains the body temperature and maintains the oxygen and carbon dioxide concentrations too.

What is the significance of the water-regulating system in an animal body?

The water-regulating system in an animal body maintains homeostasis in the body, such as electrolytes homeostasis, such as ions such as sodium and potassium in body fluids, and the lungs ,skin, play a role in regulating water balance through respiration and sweating to maintain temperature of the body.

Hence, the best example of water regulating an organism’s body temperature is a fish passing water over its gills, which is the second option, as the fish gill maintains the body temperature and maintains the oxygen and carbon dioxide concentrations too.

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why must a scientific explanation be supported by data

Answers

Answer:

Supporting a scientific inquiry with data helps reduce the bias opinion that's humans have.

Which is NOT a protective
covering for the moneran?
A cytoplasm
B. cell wall
C. capsule
D. cell membrane

Answers

Answer

Explanation:

C.capsule

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