Pasteur used swan-neck flasks in his experiments to test the validity of spontaneous generation. Suppose that after allowing the flasks to sit for a day, he had tilted one of these flasks so that the sterile broth entered the swan neck. Suppose he had then tilted the flask back to allow the broth to settle back into the round bowl of the flask before leaving it to sit undisturbed for another few days. What would have happened, and how would these results have affected conclusions about spontaneous generation?

Answers

Answer 1

Answer:

See the answer below

Explanation:

If Pasteur had tilted one of the flasks so that sterile broth entered the swan neck and then tilted it back to allow the broth to settle back, that particular flask would have had microbes growing in it after being left undisturbed for a few days.

Allowing the sterile broth to get to the neck of the swan would lead to the contamination of the broth because the swan neck is not sterile. If this had happened, the observation of growth of microbes in one of the flasks would have given further credence to spontaneous generation.


Related Questions

can yall help pls.
3. Once Eli moved on to examine the remains themselves, what marks did he decide to investigate further and what clues did the marks uncover? After these clues, explain how the investigation shifted for Eli and why the shift was significant.



4. What old stories from 1880-1890 coincided with the time period that this malnourished girl would have lived? Conversely, what contrast exists between recorded history of the time and this new evidence from the remains?


5. In order to tell the girl’s story, what did the team make a replica of? What tribe did Eli and the team ultimately decide the girl was from and how did they come to this conclusion?


6. Do you think the work that Eli did on this project was valuable? Explain your reasons why/why not

Answers

Answer:

where's the question ?? I mean what is it based on???

90°
5. The map below shows three locations, labeled A, X, and B, on Earth's surface.
180° 150° 120° 90° 60° 30° 0° 30° 60° 90° 120*150° 180°
90°
75°
75"
602
60°
452
45
30°
30°
15°
15
AL
B В


15°
th
15°
30°
30°
45°
45°
60°
60°
75
75°
90°
90°
180° 150° 120° 90° 60° 30° 0° 30° 60° 90° 120° 150° 180°
West
East
Determine the time of day at location A and B, if the time at location X is 12 noon.
no

Answers

Answer:

75''

Explanation:

its your answer ok

plewaseee helppppppppppp For sediment to be transformed into rock, which set of processes must take place?


crystallization and solidification


weathering and erosion


compaction and cementation


melting and spreading

Answers

Answer:

I am pretty sure it is B, weathering and erosion. Hope this helps!

Answer:

I’m not fully sure but I think it’s c, crystallization & solidification



hope this helps

How is a hybrid different from its originating crops?

Answers

Crossbred with other plant populations

A hybrid crop is different from the original crops as they contain genes from other crops that are beneficial for them.

A hybrid has the genetic makeup of both of its parent crops but may have completely distinct external characteristics. This is due to the fact that two recessive genes from both parent crops can be fused together to create an outward visible impact in the hybrid.

Hybrid plants are the result of the cross-pollination of two plant varieties and the propagation of the seed resulting from the mix. The plant that emerges from this seed combination is known as a hybrid plant.

To learn more about the hybrid plants, refer to the link:

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Will award 80 points

Gametes contain ______ copy/copies of each gene.

Two

Four

One

Thee

Answers

Answer:

one

There may be many possible alleles for any gene, but a diploid cell or animal contains only two alleles of each gene or two copies of a single allele; a haploid gamete contains one copy of each gene, so only one allele.

I WILL GIVE BRAINLIEST IF YOU ANSWER ALL OF THE QUESTIONS !!! I NEED IT DONE TODAY
Evolution and Natural Selection Lab Report

Instructions: In the Natural Selection lab you will explore adaptations that help organisms survive best in a particular habitat. You will observe how changing a factor in the environment will impact the organisms that live there over time. Record your observations in the lab report below. You will submit your completed report.


Name and Title

Include your name, instructor's name, date, and name of lab.



Objective(s)

In your own words, what was the purpose of this lab?



Hypothesis

In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the investigations. You will investigate two different versions of the tree environment as it changes over time: light-colored bark and dark-colored bark. Be sure to list your hypothesis for each environment below.


Example: If I investigate the light-colored bark environment, then I will observe an increase in the light-colored peppered moths over time.


Hypothesis for the light-colored bark:


Hypothesis for the dark-colored bark:



Procedure

The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable) and the outcome variable (dependent variable) for this investigation.


Reminder: The test variable is the item that is changing in this investigation. The outcome variable is the item that you are measuring in this investigation.


Test variable (independent variable):


Outcome variable (dependent variable):



Data

You will investigate both environments. Record your data for each trial of that environment in the data charts below.



Pre-Industrial Revolution Bark (Light-colored)


Generation Rate of Survival for Light-colored Peppered Moths Rate of Survival for Dark-colored Peppered Moths

1


2


3


4


5



Post-Industrial Revolution Bark (Dark-colored)


Generation Rate of Survival for Light-colored Peppered Moths Rate of Survival for Dark-colored Peppered Moths

1


2


3


4


5



Conclusion

Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.


What caused the tree bark to become darker?

In the lab simulation, which color peppered moth was able to have the higher rate of survival on the light bark?

In the lab simulation, which color peppered moth was able to have the highest rate of survival on the dark bark?

During the Industrial Revolution, explain what caused the population of light-colored peppered moths to decrease and the population of dark-colored peppered moths to increase over time. Be sure to include how the ability to survive and reproduce impacts the process of natural selection.

Predict which color peppered moth would have a better chance of survival in your neighborhood? Explain why.

Answers

Answer:

Objective(s)

In your own words, what was the purpose of this lab?

I believe the purpose of this lab is to see how much our society is evolving.

Hypothesis

In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the investigations. You will investigate two different versions of the tree environment as it changes over time: light-colored bark and dark-colored bark. Be sure to list your hypothesis for each environment below.

Example: If I investigate the light-colored bark environment, then I will observe an increase in the light-colored peppered moths over time.

Hypothesis for the light-colored bark: There will be an increase in light-colored of light-colored moths and an decrease in dark-colored moths.

Hypothesis for the dark-colored bark: There will be an decrease in light-colored moths and an increase in dark-colored moths.

Procedure

The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable) and the outcome variable (dependent variable) for this investigation.

Reminder: The test variable is the item that is changing in this investigation. The outcome variable is the item that you are measuring in this investigation.

Test variable (independent variable): The test variable is the colored bark

Outcome variable (dependent variable): The outcome variable is the colored moths population

Data

You will investigate both environments. Record your data for each trial of that environment in the data charts below.

Pre-Industrial Revolution Bark (Light-colored)

Generation

Rate of Survival for Light-colored Peppered Moths

Rate of Survival for Dark-colored Peppered Moths

1

80

20

2

79

21

3

100

0

4

100

0

5

97

3

Post-Industrial Revolution Bark (Dark-colored)

Generation

Rate of Survival for Light-colored Peppered Moths

Rate of Survival for Dark-colored Peppered Moths

1

36

64

2

19

81

3

0

100

4

13

88

5

0

100

Conclusion

Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.

What caused the tree bark to become darker?

What caused the tree bark to become darker is the time of the day the darker it is the darker the bark is.

In the lab simulation, which color peppered moth was able to have the higher rate of survival on the light bark?

The light-colored moth had a higher rate of survival than the dark-colored moth.

In the lab simulation, which color peppered moth was able to have the highest rate of survival on the dark bark?

The dark-colored peppered moth had a higher rate of survival than the light-colored moths.

During the Industrial Revolution, explain what caused the population of light-colored peppered moths to decrease and the population of dark-colored peppered moths to increase over time. Be sure to include how the ability to survive and reproduce impacts the process of natural selection.

What caused the population of light-colored moths to decrease and the population of dark-colored moths to increase over time was because the dark-colored moths could camouflage themselves on the dark bark trees and the light-colored moths couldn’t protect themselves from predators because they had no where to hid.

Predict which color peppered moth would have a better chance of survival in your neighborhood? Explain why.

I believe that the dark-colored peppered moth would have a better chance of survival than the light-colored moths because there is mainly dark bark near my neighborhood instead of light-colored peppered moths.

Explanation:

Selectively permeable membranes are important in cell function. What makes a membrane selectively
permeable?
A
The ability to remove bacteria from the cell.
B The ability to use energy to make proteins used in the cell.
The ability to modify, sort and package proteins and lipids for storage or
C
transport out of the cell.
The ability to allow needed materials to enter and wastes to exit as well as the ability to block
unneeded materials from entering the cell.
D

Answers

Answer:

The ability to allow needed materials to enter and wastes to exit as well as the ability to block unneeded materials from entering the cell.

Explanation:

A selectively permeable cell membrane only allows some things to go through it, therefore this answer choice is the correct one because it is explaining how it is selectively permeable.

i think it’s C ability to allow needed materials to enter and wastes to exit as well as the ability to block unneeded materials from entering the cell.

Which of the following best describes an atom?
Protons, neutrons, and electrons all grouped together in the center.
O
A core of negatively and positively charged particles surrounded by neutral particles...
A.core of positive and neutral particles surrounded by negative particles.
A core of electrons and neutrons surrounded by protons

Answers

Explanation:

A.core of positive and neutral particles surrounded by negative particles.

Answer:1st one

Explanation:

Its protons,neutrons,and electrons all grouped togrther in the center. O

Why don’t we have a complete fossil record of all life that’s ever lived?

Answers

Answer:

Why don't we have a complete fossil record of all life that's ever lived? Fossil formation requires a rare mix of physical and biological conditions. Fossils must be exposed at Earth's surface to have a chance of being found. Fossils can be destroyed when rocks erode, melt, or change composition.

Explanation:

For many reasons, the fossil record is not complete. Most organisms decomposed or were eaten by scavengers after death. Many species lacked hard parts, which are much more likely to fossilize. Some rocks and the fossils they contained have eroded and disappeared.

Please mark me as the brainliest

Answer:

Sediment has to cover the bones in order for fossilization to take place

Explanation:

Fossil formation requires a mix of physical and biological conditions. Fossils have to be exposed in oder to find them too, so there might be some that are just too deep in the earth for us to find them

DNA replication takes place in the (centrosome / nucleus) of a eukaryotic cell. please help :) ✨​

Answers

Explanation:

DNA replication is the process by which DNA is (copied / observed) during the cell cycle. DNA replication takes place in the (centrosome / nucleus) of a eukaryotic cell. DNA is replicated during the (M stage / S stage) of the cell cycle. ... They help unzip the DNA strand.

Mark me as brainlist..

Answer:

DNA replication takes place in the centrosome/nucleus of a eukaryotic cell. DNA is replicated during the M stage/S stage of the cell cycle. DNA replication needs to occur so that every cell/organism will have a complete set of DNA following cell division.

What is the elephant getting when the bond is broken in sucrose?

Answers

Answer:

Energy

Explanation:

The elephant is getting energy when the bond is broken into sucrose because as sucrose is broken down, it is hydrolized by enzymes sucrase which break the glycosidic bond and convert it to glucose and fructose in the upper gastrointestinal tracts. Glucose and fructose are then absorbed into the blood stream which glucose serve as energy source or stored as glycogen in the gastrointestinal tracts.

state two differences between DNA and RNA in each give two examples​

Answers

Answer:

Hope this helps you. I am very sorry for my handwriting .

If the Earth is neither tilted toward or away from the Sun, then the northern 1 point
hemisphere will experience ---
A-spring or fall
B-summer or spring
C-summer or fall
D-fall or winter

Answers

Answer:

b

Explanation:

HELP MEEEEEEEEEEEE


what are the two samples of DNA that are needed in order to identify the DNA as belonging to a specific person

Answers

Answer:

most common samples used today Blood and Hair

Answer: A known and Unknown sample of DNA is needed.

Explanation: The known sample of DNA is the sample that has the person that is suspected to be related to the unknown sample, which is the sample that is from an unknown source.

Please help!!! Needing an answer ASAP cause it's due in 30 mins!!! Please and thanks!!!:
how do mitosis and meiosis play a role in cat breeding? Explain.

Answers

Answer:

mitosis is a process of body cell formation, while meiosis is a process of reproductive cell formation. i hope i helped  (instagram itzactuallytif)

Answer:

: Mitosis and meiosis both are the types of cell division which occurs in the body of living organisms. Mitosis is responsible for growth and development in the body of cat because in mitosis, one cell is divided into two daughter cells and again these two cells divided into four and so on which increases size of organisms, while meiosis is responsible for the production of sex cells in cat which enables them to continue its breeding and produce fertile offspring.

Explanation:

You can use the table provided or use the Insert Table button to design your own table. Here is an example for one
gene:
Gene
Name
Chromosome
Sex
Chromosome
(Yes or No)
Role of
Non-mutated Gene
Effect Mutated Gene Has on Body
Gene 1
CTFR (ID:
1080)
Chromosome 7
No
important for ATP use
linked to autosomal recessive disease,
cystic fibrosis
В I o x x,
Font Sizes
A
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Gene
Name
Chromosome
Sex
Chromosome
(Yes or No)
Role of
Non-mutated Gene
Effect Mutated Gene Has on Body
Gene 1
Gene 2
Gene 3
OI
O
Gene
Name
Chromosome
Sex
Chromosome
(Yes or No)
Role of
Non-mutated Gene
Effect Mutated Gene Has on Body
Gene 1
Gene 2
Gene 3

Answers

Answer:

go to the website it provides for you

(I tried to put it in here, but it took down my answer)

This website (if you follow the instructions) it should be very easy; it gives you all the answers to update the table with. I hope this helps!

Explanation:

Edmentum

Answer:54587;

Explanation:Gigi if sti is ryy r why

Which activity would be within the field of biology

Answers

Answer:

B, measuring the rate of squirrel births in a woodland habitat.

Explanation:

Biology is the study of life so anything that's considered living would be around this field.

Answer:

Explanation:

B measuring the rate of squirrel births in a woodland habitat


Which of the following examples would be classified as a biotic component in a freshwater system

Fish
Ph of the water
Soil
Water

Answers

Answer:

Fish, water pH and the water itself

Explanation:

Fish affect the freshwater system since they live and excrete their waste in the water

pH levels of water should not be below 6 or above 8 for a healthy drink

Also, algae affects the freshwater system

Use the word MAGMATISM as an acronym. Use each letter to represent
word/s that is related to the lesson.
M
A
G
M
A
T
I
S
M

Answers

Answer: See explanation

Explanation:

When volcanic eruptions occur, there are a lot of magma i.e. molten rocks that are formed under the volcano. This formation of the magma and their movement is referred to as magmatism. The magmatic process has an impact on the way magma melts.

Magmatism can be used as an acronym in the following way:

M - Molten

A - Assimilation

G - Geology

M - Mountain

A - Active volcano

T - Tectonics

I - Igneous

S - Seismograph

M - Melting

What is being broken down for energy during cellular respiration?

Plants

Glucose

Mitochondria

Carbon Dioxide

Answers

B: Glucose

Glucose is broken down for energy during cellular respiration.

The movement of molecules down a concentration gradient through transport proteins in the cell membrane is a type of

Answers

Answer:

In cells, somemolecules can movedown theirconcentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.

Explanation:

please mark as brainlist answers

Which phrase accurately characterizes sexually transmitted infections (STIs)?

are caused by bacteria, viruses, or parasites
always cause visible symptoms
are rarely transmitted by sexual contact
can be contracted only by women .

Answers

Answer:

Are caused by bacteria viruses or parasites

Explanation:

not all cause visible symptoms

it would not be a sexual transmitted infection if not caused by sexual contact

STIs can be contracted by men and women

Answer:

a

Explanation:

Why is mitochondria regarded as power House of the cell.
Why is chromosome responsible for transmission of traits.​

Answers

Answer:

Mitochondria are known as the powerhouse of the cell because it is responsible for the extracting energy from food through cellular respiration. The energy is released in the form of adenosine triphosphate (ATP) it is an energy currency of the cell.

Explanation:

How was the cane toad introduced in Australia

Answers

Answer: Option B)

Im 100% sure its the answer!

⚠️ i will mark brainliest
how does matter move from the hydrosphere into the biosphere explain in your own words

Answers

Water moves from a river (hydrosphere) into the air (atmosphere) by a process called evaporation. Carbon dioxide moves from your body (biosphere) into the air (atmosphere) by a process called respiration. Minerals move from rock (geosphere) into the soil (pedosphere) by the process of weathering.

Water mover form hydrosphere i.e river to biosphere i.e atmosphere by a process of  evaporation.Thus, we can say that matter is move from hydrosphere to biosphere.

What is hydrosphere and biosphere?

Hydrosphere:-

The hydrosphere is the collective mass of water which is found on under, or above the surface of earth. Although earth hydrosphere is 4 billions old. A planet's hydrosphere can be liquid, vapor or ice.

Biosphere:-

The region or area of surface where living organisms survive their life are called as biosphere. The biosphere is a narrow zone on the surface of the earth where soil, water, and air combine to survive life.

Evaporation:-

The process in which water or liquid converts into vapor is called as evaporation.  In the case of water it starts vaporization at 100 degree C.

So, we can say that the conversion of matter from hydrosphere to biosphere is successfully achieved by evaporation.

Therefore, Water mover form hydrosphere i.e river to biosphere i.e atmosphere by a process of  evaporation.Thus, we can say that matter is move from hydrosphere to biosphere.

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Which refers to the measure of the amount of water vapor in the air?

Answers

Humidity is the amount of water vapor in the air

When a molecule passes between the phospholipids of the cell membrane it is
called?

Answers

Answer:

Water also can move freely across the cell membrane of all cells, either through protein channels or by slipping between the lipid tails of the membrane itself. Osmosis is the diffusion of water through a semipermeable membrane

Please Help me find 5 safety violations or more

Answers

Answer:

no goggles, smelling the substance and not wafting it, there is liquid on the ground, not being careful of surrounding (the person holding the box), and someone is on the ground during an active experiment

Explanation:

Which normal meiotic event would be the MOST LIKELY explanation for the mutation that causes Williams Syndrome? cytokinesis​

Answers

Answer:

a

Explanation:

because

The answer would be A becuase your asking the normal one


Sedimentary rocks form because of all of the following EXCEPT

A. sediments becoming pressed or cemented together

b. crystals solidifying from magma

c. sediments forming from solution

d. water evaporating, leaving crystals behind

Answers

Answer:

a sediments  becoming pressed or cemented together

Explanation:

Answer:

a

Explanation:

Other Questions
QuestionIdentify the correct graph and solution for the inequality.10 a function of the amino acid Ejercicio AEscriba la letra que indique la relacin correcta con cada expresin de la columna de laizquierda:1. Puerto Ricoa. gran teatro mexicano2. Hondurasb. plaza mayor de la Ciudad de Mxico3. XochimilcoC. museo histrico4. Costa Ricad. Estado Libre Asociadoe. pals sin ejrcito5. Rio Bravo del Nortef. base naval6. Veracruz8. Perla de las Antillas.7. Nicaraguah. jardines flotantes8. El Morroi. frontera con los Estados Unidos9. El Salvador1. pas ms grande de Centroamrica10. La Espaolak. puerto del Golfo de Mxico11. Santo Domingo1. pas ms montaoso de Centroamrica12. Palacio de Bellas Artesm. Haiti y la Repblica Dominicana13. Castillo de Chapultepecn. fortaleza del siglo XVI14. Cuba0. ciudad ms antigua de Amrica15. Guantanamop. pas ms pequeo de CentroamricaEjercisio BCierto o falso? Indique si cada frase es cierta o falsa. Si es falsa, cmbiela para hacerlaciertas Vuelve a escribir las siguientes oraciones a voz activa. Las canciones rancheras son cantadas por Vicente : Las manzanas verdes fueron comidas por nosotros:La camiseta roja fue comprada por Eduardo : La cerveza clara en un vaso fue tomada por m :Un local de comida ser abierto por Ernesto y su familia. :El agua fra fue calentada por Ana :EL incendio ser apagado por la brigada de bomberos :Un sombrero de color negro es usado por el vaquero :La pelea al final de la pelcula es iniciada por el protagonista:Hoy un caf bien preparado fue servido por el mesero : Provide customers with a mobile app that lets them click to send a message that they are en route to pick up their dog, as well as see their invoice and click to pay it with the credit card on file. What effects does overpopulation have on religion? Please AsapppECR question what does carbon footprint mean??? Pls help me answer this 21.Prediction: If you were to measure the current at points A, B and C, how do you think the values would compare? Why? 22.Prediction: If you were to measure the potential differences across these bulbs (what the voltmeter measures) how do you think the values will compare to each other and to the potential difference across the battery pack or the power supply? Why? *PLEASE ANSWER , IM CONFUSED*How did George Washington's political beliefs affect his term as president?a.) His beliefs on limited individual power inspired term limits.b.) His belief in legislative power limited presidential power.c.) His reliance on the military made military service essential.d.) His passion for states' rights resulted in constrained presidential power. What is the probability that a junior non-Physics major and then a freshman non-Physics major are chosen at random? For a certain product we obtained a regression line equation Y = 10 - 0.8 X, where X is price (in $) and Y is sales (in $1,000). The slope of the line (- 0.8) represents:___---.A. If the price were $10, expected sales would be $8,000.B. If the price were zero, expected sales would $800.C. If the price increases by $1, sales will decrease by $800, on average.D. Sales are maximized when the price is $0.8.E. None of the other answers are correct. Jeff's friend is venting to him about a situation with one of his teachers. Jeff is going to try to validate his friend; to do so he should do all of the following EXCEPT:A. Try to understand how his friend is feeling.B. Try to figure out a way to fix his friend's problem.C. Try to listen to what his friend needs.D. Try to comprehend what his friend went through. A volcano erupts, and a chunk of hot magma is launched horizontally with a speed of 208\,\dfrac{\text m}{\text s}208 s m 208, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction from a height of 94\,\text m94m94, start text, m, end text. We can ignore air resistance. The table below lists the 2010 population data for the worlds 10 most populous countries. A line which has an undefined slope is _____.A. zeroB. horizontalC. verticalD. undefined look at picturelook at picture A family is purchasing 17 tickets for a downtown walking tour. Adult tickets are $10, child tickets are $7, and senior tickets are $8.50. The totalcost of the tickets is $141.50, and they are purchasing 2 more senior tickets than adult tickets.Create and solve a system of linear equations to represent this situation. Then select the true statement.. The solution to this system is nonviable because it results in a fractional number of tickets. B. The solution to this system is no viable because it results in a negative number of tickets.C. The solution to this system is viable.D. The solution to this system is nonviable because it results in a fractional amount of money. In terms of the entire bill, which rational number represents the net change to Callies bank account? What does the sign on the number mean? Please help A.S.A.PWhat would you expect to see on intrusive igneous rocks compared to extrusive igneous rocks?