what statement did louis pasteur confirm with his broth e
Answers
Answer:
Pasteur observed that the broth in the straight-neck flask was discolored and cloudy, while the broth in the curved-neck flask had not changed.
Explanation:
He concluded that germs in the air were able to fall unobstructed down the straight-necked flask and contaminate the broth. The other flask, however, trapped germs in its curved neck, preventing them from reaching the broth, which never changed color or became cloudy.
Hope this helps.
Answer:
Pasteur observed that the broth in the straight-neck flask was discolored and cloudy, while the broth in the curved-neck flask had not changed.
Related Questions
Which Punnet square allows for the possibility that Tom and Alices children have attached earlobes?
Answers
Answer:It is the second one
Explanation:Due to the second punnet square featuring the ee combination, they can have attached earlobes. Recessive traits have to be ee(both recessive), and as a capital E (dominant trait) would override the recessive trait, only the second square allows for attached earlobes
Which of the following Venn diagrams would BEST be suited to represent the three categories of animals?
Answers
Answer:
intersecting circle and the universal affarmative
Explanation:
How does the chemical reactivity of an unstable isotope compare with that of a stable isotope?
Answers
Answer:
The difference between a stable isotope and an unstable isotope
A "stable isotope" is any of two or more forms of an element whos nuclei contains the same number of protons and electrons, but a different number of neutrons. Stable isotopes remain unchanged indefinitely, but "unstable" (radioactive) isotopes undergo spontaneous disintegration.
Explanation:
hope it helps!
The sun is located at one of the two___ in the shape of earth’s orbital path.
Answers
Answer:
foci
Explanation:
Kim knows that today’s lab investigation will involve heating liquids over an open flame. Which apparel choice would indicate that Kim planned to stay safe during the investigation
Answers
Answer:
Apron, gloves, closed toe shoes, goggles. Kim should also tie long hair back if she has it and should roll long sleeves up.
Explanation:
Aprons, closed toe shoes, and goggles will prevent any of the liquid being heated from burning and harming her skin or eyes.
Gloves are needed to protect her hands from heat and the liquid as well.
Long hair should be tied back to prevent it from being burned or harmed from the liquid, and long sleeves need to be rolled up to prevent them from being caught on fire or dragging into the liquid.
Answer:
a lab coat with long sleeves
Explanation:
i just took the test
(1) What will be the frequency of the recessive allele in a population of 100 kangaroos if there are 50 dominant alleles?
a. 150
b. 0.75
c. 0.50
d. 0.25
(2) If the frequency of the recessive allele for a gene is 0.3, calculate the expected frequency of heterozygotes in the next generation if the population is in Hardy-Weinberg equilibrium.
a. 0.42
b. 0.21
c. 0.70
d. 0.30
Answers
Answer:
1. Option c
2. Option a
Explanation:
1. If there are 50 dominant alleles, this represent the frequency of dominant alleles p = 50/100 = 0.5
Using the formula p+q = 1 we can solve for the frequency of the recessive alleles q = 1 -0.5 = 0.5 = 50%.
2. the frequency of the recessive allele for a gene is 0.3 which is q = 0.3
From the Formula p + q = 1 we can solve for p the frequency of the dominant alleles = 1 - 0.3 = 0.7
To calculate for the number of heterozygotes, we use 2pq = 2 x 0.7 x 0.3 = 0.42
why would CH not form as a result of carbon's interactions with other elements? A:Carbon normally has two covalent bonds. B:Carbon normally has four covalent bonds. C:Carbon cannot bond with hydrogen only.
Answers
Answer:
B
Explanation:
Ms,Biswas made me do this mate (PAIN)
Answer:
B - Carbon normally has four covalent bonds.
Explanation:
Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video. Which of the following would make the best project?
Answers
Answer:
a video that shows penguin species that have different mating dances
Explanation:
The question is incomplete as it does not have the options which are:
a video that shows a large river that has penguin populations on both sidesa video that shows penguin species that have different mating dancesa video that shows a penguin that is laying eggsa video that shows penguins in a tidal pool and an open oceanAnswer:
a video that shows penguin species that have different mating dances
The reproductive isolation is the factor which allows the species to evolve and form a new species, therefore, this factor is used to describe a species.
The reproductive isolation refers to a mechanism in which the species are isolated to not interbreed with the individual of other species. The reproductive isolation could be due to behavioural, psychological, physical or genetic differences. evolved as an adaptation.
In the given cases, the penguin species which shows different mating dances is considered to be reproductively isolated as the different dance rituals evolved as behaviour to prevent them from mating.
Thus, the selected option is correct.
A video that shows a large river that has penguin populations on both sides would make the best project. So, the correct option is A.
What is Population?A population is defined as the complete set of individuals, whether that group includes a nation or a group of people with a common characteristic which is the pool of individuals from which a statistical sample is drawn for a study. .
It is described as a unit of biological community made up of a permanent group of an interbreeding individual of a species found in a space or geographic region at a particular time. Population are of three types of population pyramids created from age-sex distributions-- expansive, constrictive and stationary.
Thus, a video that shows a large river that has penguin populations on both sides would make the best project. So, the correct option is A.
Learn more about Population, here:
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Your question is incomplete, most probably the complete question is:
Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video. Which of the following would make the best project?
a video that shows a large river that has penguin populations on both sidesa video that shows penguin species that have different mating dancesa video that shows a penguin that is laying eggsa video that shows penguins in a tidal pool and an open oceanFALLING OF STONE
○ FAST CHANGE
○NATURAL DESIRABLE CHANGE
○NATURAL UNDESIRABLE CHANGE
○SLOW CHANGE
Answers
Answer:
answer is fast change due to free fall of object in air.
Which among the following controls the
cell's behavior?
Answers
Answer:
The nucleus controls the cell's behaviour.
Cell proliferation (increase/multiplication)
Cell differentiation
These are the four main factors that control cell behavior.
Explain how this experiment disproves the theory of spontaneous generation.
Answers
Answer:
The theory of spontaneous generation suggested that the living organisms can come from inanimate objects, however, it is an obsolete theory that is disproved by many experiments. The very first experiment that disapproved it was the experiment by Francesco Redi in 1668.
He demonstrated that maggots come from the eggs of flies instead of rotting meat. He placed raw meat inside of every jar. Half the jars he left open and the other half, he covered with mesh. In open jars, he found maggots after some time but covered jars have no maggots. That proved that the maggots come from eggs of flies rather than rotten meat.
The presence of flies on the meat is responsible for the production of maggots in meat.
This experiment disproves the theory of spontaneous generation because maggots are produced from the flies not the rotten meat. According to spontaneous generation, living organisms are formed or develop from nonliving matter.
So by performing this experiment we can see that maggots are formed when the flies feed on the rotten meat otherwise no maggots are present if the flies are not present there so that's why we can conclude that this experiment rejects the theory of spontaneous generation.
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what are 4 effects of global climate change
Answers
Answer:
I think I can help you.
Explanation:
I think I can help you.
answer
the 4 effects of global climate change are as follow:
1.due to more factories.
2.due to pollution.
3.due to air pollution.
4.due to water pollution.
This event occurs in lakes every year. Which season(s) does this event
occur in ?
1 point
Answers
Answer:
Lake turnover occurs during the spring season.
Explanation:
There is too much wind.
A scientist has discovered a new plant species in the Amazon rainforest she tells her fellow scientist at the Playhouse she has found for Tuesday is a cone for my side about this plan is different from an organism
Answers
Answer:
It is a seeded vascular plant.
It does not depend on insect pollination.
Explanation:
The complete question is: A scientist has discovered a new plant species in the Amazon rainforest. She tells her fellow scientists that the plant she has found produces a cone. What might they say about how this plant is different from an angiosperm? Its seeds have one or two cotyledons. Its stems' vascular bundles are scattered. It does not depend on insect pollination. It is a seeded vascular plant.
The correct option would be that the plant is a seeded vascular plant and does not depend on insect pollination.
Gymnosperms are the only group of plants that produce cones. They are one of the plant groups that have vascular tissues in the form of xylem and phloem as well as been able to produce seed in the form fo cones. Hence, they are said to be seeded vascular plants.
Gymnosperms also carry out their pollination by relying solely on wind for the transfer of their pollen grain to the female organ. In other words, they do not depend on insect for pollination.
23. Which activity most directly involves the
process represented in the diagram below?
1. a gamete produced in meiosis
2. a white blood cell engulfing bacteria
3. a zygote being produced in an testes
4. a human repairing damaged tissue
Answers
1. A gamete produced in meiosis
a gamete produced in meiosis is the correct answer .
What is meiosis ?Meiosis is the process where a single cell divides twice to produce four four haploid daughter cells which are otherwise called as gametes; It can occur in two substages such as meiosis I and meiosis II.
Humans have 46 chromosomes in every cell, where 23 chromosomes t came from one of our parents and 23 very similar chromosomes that came from the other parents.
Meiosis I consist of substages like Prophase I where nuclear envelope disintegrates, Chromosomes begin to condense, Spindle fibres appear.
Secondly Prometaphase I where Spindle fibres attach to the centromere followed by Metaphase I where The homologous chromosomes align at the equatorial plate, Anaphase I where he homologous chromosomes move towards the opposite poles.
Telophase I where Spindle fibres disappear, Cytokinesis I where the cytoplasm and the cell division result in 2 non-identical haploid daughter cells.
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which of these forms when moves in the directions shown by the arrows in the diagram
Answers
Answer:
A. Mountain breeze
Pls give 5 stars and thanks!
Answer:
a
Explanation:
If we are in a pool submerged in water and someone shouts from outside, do we hear the sound? What happens on your tour? What phenomenon occurs?
Answers
The soft and green stems found in flowers are called:
Answers
Hope it helps!
Answer:
sepals aka calyx
Explanation:
sapelis lowest part on flowers which covers the flower and from which pedicel is produced.
right auricle is bigger than left auricle why
Answers
Explanation:
Veins carry deoxygenated blood from different parts of the body to our heart. ... Since a larger volume of blood is collected in the right auricle than that of the left auricle, right auricle is larger than the left auricle.
Which feature is created by deposition from rivers
Answers
Answer:
Explanation:
The answer is meanders
Hope this helps
Plz mark it as brainliest!!!!!!!!!
Answer:
The person is right
what is the meaning of humidity
Answers
Answer:
Explanation:
The concentration of the water vapour present in the air
True or False: Population size influences the chances of a species surviving or going extinct, and smaller populations are more likely to go extinct.
Answers
Answer:
True
Explanation:
In my opinion it makes sense
The___is also called the dark reaction in photosynthesis
Answers
Answer:
The answer is Carbon-Fixing Reactions or Light Independent Reactions.
Explanation:
Identify the characteristic that allows the cell membrane to regulate which substances enter and exit the cell. nonpolar selectively fluid selectively permeable flexible
Answers
Explanation:
The answer is that all cells are "semi-permeable,"
this allows cells to take in only the nutrients needed...
what does the m stand for in interphase
Answers
Answer:
I believe the answer is mitosis
Explanation:
Hope this helps.
Is it recommended for most adults that carbohydrates make up 45-65% of their diet, proteins make up 10-35% of their diet, and fats make up 20-30% of their diet. Does Deb’s diet mee these recommendations? Support your statement with calculations
Answers
Answer:No her diet does not. She is currently eating 128.52 calories each for protein, 289.17 calories from fat, and 1413.44 calories from carbs. This means she is consuming 6.6% of her diet from protein, 14.9%, of her diet from fat, and 73.2% of her diet from carbs.
Explanation:
What are immunoglobulins?
Answers
Answer:
Immunoglobulin, is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses.
How are viruses different from Bacteriophages?
Answers
Answer: It's different because it is a bacteria eater.
Explanation: A bacteriophage is a type of virus that infects bacteria. In fact, the word "bacteriophage" literally means "bacteria eater," because bacteriophages destroy their host cells. All bacteriophages are composed of a nucleic acid molecule that is surrounded by a protein structure.
Hope this helps! Stay safe :))))
Answer:
Even bacteria can get a virus! The viruses that infect bacteria are called bacteriophages.
Explanation:
A bacteriophage is a virus that infects bacteria.
A bacteriophage, or phage for short, is a virus that infects bacteria. Like other types of viruses, bacteriophages vary a lot in their shape and genetic material.
5% of $20
somebody help me pls
Answers
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can one of y'all pick a body of water for me please? It can be any lake, river, bay, whatever. Please pick one that's easy to research biology questions like salinity and how the sun affects the species living in it. this is so I don't fail biology but I am anyways hahahahahahahahahaha please help me...
Answers
Answer:
Mississippi River.
Explanation:
Answer:
lake tahoe, calabazas creek... etc