place these reagents in the proper order of their use in the gram staining technique
Answers
The proper order of reagents in the gram staining technique is: crystal violet, iodine, alcohol or acetone, and safranin.
The most popular gram staining technique in bacteriology, the Gramme stain, is a complex and differential staining method. In gramme staining, methylene blue or crystal violet are utilised as the primary colours. Under a microscope, gram-positive organisms appear to be purple-brown and still have their original colour. Gram-negative organisms do not absorb the primary stain, which makes them appear red.
The cell wall composition of organisms in the Domain Bacteria is distinguished through a series of staining and decolorization methods. 90% of the cell walls of gram-positive bacteria are made up of thick peptidoglycan coatings. This stuff stains purple. Gram-negative bacteria have thick lipid layers and thin peptidoglycan layers (10% of the wall) in their cell walls. These leave a pink stain.
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Related Questions
which action is most likely lead scientist to change improve an existing scientific theory about evolution
Answers
The discovery of new evidence or inconsistencies is likely to lead scientists to improve an existing theory of evolution.
The most likely action that could lead a scientist to improve an existing scientific theory about evolution is the discovery of new evidence that contradicts or challenges the current understanding. Science is a dynamic field that constantly evolves as new information becomes available. If a scientist comes across empirical data that cannot be explained by the existing theory or if inconsistencies arise, it may prompt them to reevaluate and modify the theory. This could involve conducting further experiments, gathering additional data, or proposing alternative explanations. Additionally, advancements in technology, such as new techniques for genetic analysis or fossil discoveries, may provide insights that necessitate revisiting and refining the theory of evolution. Critical analysis, rigorous experimentation, and an open-minded approach are crucial for scientists to refine existing theories and develop a more comprehensive understanding of evolution.For more such questions on Evolution:
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muscle contraction that permits the muscle to shorten. State of true or false. 1. True2. False
Answers
True. Muscle contraction permits the muscle to shorten.
When you perform an activity, your muscles are tightened, lengthened, or shortened. When you stretch or lift weights, hold or pick up anything, or exercise, it may happen. Muscular relaxation, or the return of contracted muscles to their relaxed condition, frequently occurs after muscle contraction.
When an Action Potential travels from the nerves to the muscles, a muscle contraction is caused. When the neurological system sends a signal, muscle contraction starts. Motor neurons are a particular class of nerve cells that carry the signal, an impulse known as an action potential.
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The given statement is true. Muscle contraction is a phenomenon that permits the muscle to shorten. All that muscles can do is a contract. A muscle's origin is a stationary location that does not move. The origin pulls the insertion inward during a contraction. Therefore, the response is accurate.
Your muscles are extended, shortened, or tightened when you undertake an activity like a stretch, lifting weights, holding something, picking something up, or working out. Following a muscle contraction, muscular relaxation, or the return of contracted muscles to their relaxed state, frequently takes place. Muscle contraction is brought on by an action potential that moves from the nerves to the muscles. Muscle contraction begins when the neurological system sends a signal. A specific type of nerve cell known as a motor neuron carries the signal, an impulse called an action potential.
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What type of force does the water exert on the planes floats, which cause the motion of plane to slow?
Answers
Mrs. Jones' class was learning about how molecules are arranged in solids, liquids, and gases. To model molecules in liquids, she had the students stand one meter apart.
Which ,begin emphasis,best,end emphasis, describes how the students would stand to model the molecules in a solid?
Answer options with 5 options
A.
as far apart as possible
B.
in rows one meter apart
C.
as close as possible
D.
against the classroom wall
E.
five meters apart
Answers
Why do we cook the traditional Chinese dish "pork knuckles and ginger stew" in a clay pot rather than a metal pot?
Answers
which division of the nervous system controls the radial muscles of the eye?
Answers
Answer:
sympathetic.
Explanation:
What does DNA replication ensure?
Answers
Answer:
To ensure that mistakes, or mutations, are not introduced, the cell proofreads the newly synthesized. Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
Explanation:
What is not a following factor influencing natural selection
Answers
compare and contrast the fisherman and the jinnee
Answers
Hi, can anyone answer this question please
Explain any two concepts of science from your previous class that you have retained
Answers
Answer:
I can't have any two concept of science from your previous class that you have retained
Examine three ways how destructive relationship could influence your well-being as opposed to constructive relations
Answers
Destructive relationships can have a significant impact on an individual's well-being, including their emotional and mental health, physical health, and personal growth and development. On the other hand, constructive relationships can have a positive impact on an individual's well-being and support their overall health and happiness.
An individual's wellbeing can be significantly impacted by destructive connections, whilst positive interactions can have the opposite effect. Here are three ways that negative relationships, as opposed to positive ones, might affect a person's wellbeing:
1) Emotional and Mental Health: Negative relationships can lead to serious emotional and mental health issues like depression, anxiety, and poor self-esteem. These relationships could involve manipulation, long-term psychological suffering, emotional or physical abuse, or other toxic behaviors. Contrarily, healthy relationships can offer emotional support and inspiration, resulting in elevated levels of self-worth, self-assurance, and good mental health results.
2) Physical Health: Negative relationships can also have an adverse effect on a person's physical wellbeing. Headaches, exhaustion, and digestive problems are just a few examples of the physical symptoms that can result from the ongoing stress and emotional anguish that come with these relationships. People in poor relationships may also employ unhealthy coping strategies like substance abuse or self-harm. A person's physical health, on the other hand, can benefit from constructive relationships because they offer a safe and encouraging environment where people can put their physical health first.
3) Personal Growth and Development: By limiting a person's potential and prohibiting them from achieving their goals and aspirations, destructive relationships can obstruct a person's personal growth and development. Contrarily, constructive relationships can promote personal development by offering possibilities for growth as well as support and encouragement. The development of talents and a sense of purpose and direction in life can both be assisted by positive relationships.
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Which term describes the relationship in which one organism lives inside the other one. Check ih correct answer
Answers
Answer:
The term that describes the relationship in which one organism lives inside the other one is endosymbiosis.
Explanation:
Question # 9
Multiple Choice
At what part of the fern's life cycle does a zygote form?
O During meiosis
O After fertilization
O Zygotes do not form at anytime during the fern's life cycle.
O Before fertilization
Answers
The correct answer is: After fertilization.
Fertilization is the process in which a sperm cell and an egg cell fuse together to form a zygote. This fusion combines the genetic material from both parents and initiates the development of a new organism. Fertilization typically occurs after the sperm reaches and penetrates the egg.
Fertilization is the remarkable process by which new life begins. It starts with the release of sperm cells from the male reproductive system through ejaculation. These tiny, motile cells embark on a challenging journey through the female reproductive tract, propelled by fluids and muscular contractions. Meanwhile, in the female reproductive system, an egg cell is released from the ovary during ovulation and travels down the fallopian tube.
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Which of the following occurs in an angiosperm ovule?
A) An antheridium forms from the megasporophyte.
B) A megaspore mother cell undergoes meiosis.
C) The egg nucleus is usually diploid.
D) A pollen tube emerges to accept pollen after pollination.
E) The endosperm surrounds the megaspore mother cell.
Answers
The correct answer is option B) A megaspore mother cell undergoes meiosis.
In an angiosperm ovule, the correct option is B. A megaspore mother cell, located within the ovule, undergoes meiosis to produce haploid megaspores.
The megaspores then undergo further development, leading to the formation of the female gametophyte (embryo sac) within the ovule. The female gametophyte contains the egg nucleus, which is usually haploid, not diploid (option C).
Option A is incorrect because an antheridium is a structure found in some lower plants like ferns and mosses and is not involved in angiosperm reproduction.
Option D refers to pollination, which occurs prior to fertilization, and option E is incorrect as the endosperm does not surround the megaspore mother cell.
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Why do traits that give an organism a disadvantage exist during meiosis? Please be as descriptive as possible and write it in your own words
Answers
Answer:
Meiosis is important because during sexual reproduction, it ensures that all produced organisms have the correct number of chromosomes. It is also responsible for producing genetic variations during the process of recombination, and it repairs some genetic defects.
The disadvantage from not having the trait normally arises only after the reproductive stage of the individual's lifecycle is mostly over. This is a special case of "no strong pressure", because evolution selects genes, not the organism. In other words the beneficial mutation does not alter the reproductive fitness.
Explanation:
Meiosis is important because during sexual reproduction, it ensures that all produced organisms have the correct number of chromosomes. It is also responsible for producing genetic variations during the process of recombination, and it repairs some genetic defects.
FILL IN THE BLANK. Metabolic acids which are derived from metabolic wastes are more commonly referred to as _____ acids.
fixed
reactive
volatile
free
Answers
Metabolic acids generated from metabolic waste are more frequently known as volatile acids. Here option C is the correct answer.
Volatile acids are organic acids that have a low molecular weight and can easily vaporize or evaporate at normal temperatures. They are typically produced as byproducts of metabolic processes within the body. When metabolic wastes, such as amino acids, carbohydrates, and fats, undergo metabolism, they can generate various volatile acids as intermediate or end products.
One of the most well-known volatile acids in the body is carbonic acid, which is formed when carbon dioxide (CO2) combines with water (H2O) in a reversible reaction. Carbonic acid plays a crucial role in maintaining the acid-base balance in the body and is involved in the transportation of CO2 from tissues to the lungs for exhalation.
Other examples of volatile acids include acetic acid, lactic acid, and formic acid, which are produced during processes like anaerobic metabolism and fermentation.
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Complete question:
FILL IN THE BLANK. Metabolic acids which are derived from metabolic wastes are more commonly referred to as _____ acids.
A - fixed
B - reactive
C - volatile
D - free
What are some applications of the field of spectroscopy? select 5 options. for identifying elements in a sample for determining the distance and velocity of galaxies for producing neon lights for determining types of chemical bonds for use in medical imaging devices for killing bacteria in foods
Answers
The application of spectroscopy from the list given is : (B). determining the distance and velocity of galaxies
Meaning of spectroscopySpectroscopy is the branch of science, designed to investigate and measure the amount of spectra that is produced when a matter emits electromagnetic radiation or interacts with electromagnetic radiation.
Spectroscopy can also be said to mean the study of matters radiation or light emission and absorption
In conclusion. the application of spectroscopy is determining the distance and velocity of galaxies
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Answer: A B C D E
for identifying elements in a sample
for determining the distance and velocity of galaxies
for producing neon lights
for determining types of chemical bonds
for use in medical imaging devices
Explanation:
FILL IN THE BLANK if you are on a glorious picnic and are rudely interrupted by a pestering winged hymenopteran (bee, wasp, or ant) trying to eat your lunch meat, it is almost always a ______ that is bugging you.
Answers
If you are on a glorious picnic and are rudely interrupted by a pestering winged hymenopteran (bee, wasp, or ant) trying to eat your lunch meat, it is almost always a wasp that is bugging you.
When it comes to hymenopteran insects, such as bees, wasps, and ants, it is usually the wasps that show a keen interest in human food, particularly meat and sugary substances. Unlike bees, which are primarily focused on collecting nectar and pollen, wasps are more opportunistic scavengers and predators. They are attracted to the protein in meats and other food items, making them more likely to be bothersome during picnics. Wasps have slender bodies, distinct yellow and black markings, and a characteristic narrow waist. While bees and ants may occasionally explore food sources, it is the wasps that are often associated with picnic intrusions due to their dietary preferences and scavenging behavior.
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In the previous question a heterozygous female with horns mated with a male that was homoezygous recessive (no horns). What is the ratio of horned to no horned offspring?
Question 16 options:
1:3
1:1
Answers
Answer:
1:1
Explanation:
FILL IN THE BLANKS WILL MARK BRAINLIST
Animals make the ______________ that plants need, and plants make the ______________ that animals need.
Answers
Answer:
animals make the CARBON DIOXIDE that plants need and plants make the OXYGEN that animals need
Explanation:
Hope this helps...
3. If a mutation occurs on a segment of DNA that codes
for an enzyme, what is most likely to happen to the
enzyme?
Answers
A amino acid that is synthesized changes as a result, which may alter the structure of an enzyme's active site.
What is an easy way to define enzyme?A biological catalyst called an enzyme is usually always a protein. It promotes a certain chemical reaction inside the organism. The enzyme is continuously employed during the process and is not destroyed.
What is an example of an enzyme?Several instances include: Lipases: This class of digestive enzymes aids in the breakdown of lipids in the gastrointestinal tract. Hydrolyzes: Enzymes assists in the transformation of starches to sugars inside the salivary. The salivary enzyme maltose breaks down the sugar malted grains into glucose.
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if a somatic cell from a mouse contains 40 picograms of dna during g2 of interphase, then how many picograms of dna would be present in each cell during anaphase i of meiosis?
Answers
A mouse somatic cell would contain 40X2=80 picograms of DNA if it has 40 picograms more DNA at g2 of interphase.
What is a cell ?The smallest unit in biology that can sustain life on its own and tries to make up all living things as well as the body's tissues. The cellular membranes, the nucleus, as well as the cytoplasm are the three primary components of a cell. The cell membrane, that completely covers the cell, controls the chemicals that enter and exit the cell. A peer-reviewed scientific publication called Cell publishes research papers in a variety of life sciences fields. Cell was established by Benjamin Lewin in January 1974 under the auspices of MIT Press. After purchasing the book, he started Cell Press on his own in 1986. Lewin sold Cells Press to Elsevier in April 1999.
What are the types of cells and its functions ?Epithelial cells are one type of cell. These Nerve Cells are closely bound to one another. Muscle cells, connective tissue cells, and all these cells were specialized for communication, contraction, and movement. Cells primarily serve as structural and supportive components. You are aware that bricks make up a house, Growth. The simple process of cell multiplication, transportation, energy production, metabolism, and reproduction allows tissues in complex creatures like humans to flourish.
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Explain how a wholemeal sandwich with tuna and tomatoes will be broken down by the digestive system. Start the process from the mouth and end at the anus.
Answers
Answer:
All of our energy and nutrition come by way of the gastrointestinal (GI) tract. It is an amazing machine well designed for digesting and absorbing nutrients and for shielding the rest of the body from microorganisms, viruses and other foreign matter. The GI tract spans from the mouth to the anus, with each separate organ having a role in digestion, absorption or excretion.Lastly, if you would like to learn more about yourself and how you can best reach your own nutritional and fitness goals, we encourage you to take a look at the following home health testing guides and resources:
Food Sensitivity Testing Guide
DNA Health Testing Guide
Guide to Life Extension Products
Home Health Testing Guide
Everlywell Home Tests Guide
Home Testing for Heavy Metals
Explanation:
(: tsorry hope to help
Which choice is not an example of a molecule?
O Mn
O H₂S
О КОН
O 03
Answers
What stage of photosynthesis uses carbon dioxide to make glucose
Answers
Answer: Stage II
Explanation: The Calvin cycle takes over where the light reactions end. It uses chemical energy stored in ATP and NADPH (from the light reactions) and carbon dioxide from the air to produce glucose, the molecule that virtually all organisms use for food.
Answer: 2nd stage which Calvin Cycle
Explanation:
Stage 2
Calvin Cycle
It uses carbon dioxide from the air and water to convert it to the sguar or Glucose
Hope it helps
What are air masses and how do they form?
Answers
Answer:
a body of air with horizontally uniform temperature, humidity, and pressure.
Explanation:
An air mass forms whenever the atmosphere remains in contact with a large, relatively uniform land or sea surface for a time sufficiently long to acquire the temperature and moisture properties of that surface. The Earth's major air masses originate in polar or subtropical latitudes.
Which statement about people with lactose intolerance is true?
Their cells do not express the gene for the protein lactase.
O Expression of the lactase gene produces malformed proteins.
O Lactose interferes with receptors on their cells and disrupts communication.
O Their cells mistakenly destroy all lactase that is produced.
Answers
The statement "Their cells do not express the gene for the protein lactase" is true about people with lactose intolerance.
What is lactose intolerance?Lactose intolerance is a condition in which individuals are unable to digest lactose, a sugar found in milk and dairy products, due to a deficiency of the enzyme lactase. Lactase is responsible for breaking down lactose into simple sugars, which can then be absorbed into the bloodstream.
People with lactose intolerance do not produce enough lactase, leading to undigested lactose in the gut, causing symptoms such as bloating, diarrhea, abdominal pain, and gas. The severity of lactose intolerance varies among individuals, but most people with lactose intolerance can manage it by limiting their consumption of dairy products or taking lactase supplements.
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Answer: their cells do not express the gene for the protein lactase .
Explanation: i took the test and got it right !
What was the purpose of using CRISPR in the Anopheles gambiae mosquitoes experiment?Group of answer choicesTo find a way to lower mosquito populations in the wild and get rid of malaria in the future.The purpose of this experiment was to create a new disease like malaria.To find a way to lower mosquito populations in the wild and increase cases of malaria in the future.To find a way to increase mosquito populations in the wild and get rid of malaria in the future.
Answers
To find a way to lower mosquito populations in the wild and increase cases of malaria in the future the purpose of using CRISPR in the Anopheles gambiae mosquitoes experiment.
Why do humans get malaria?The malaria parasite, which is spread by infected mosquitoes, multiplies inside red blood cells after entering the human bloodstream. After a few days, these cells burst, infecting other red blood cells and resulting in symptoms such as a severe headache, nausea, vomiting, fever, and coma.
What causes malaria largely?A plasmodium-genus single-celled parasite, which causes malaria. Most frequently, mosquito bites are the means of parasite transmission to people.
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Meiosis creates
A. 2 daughter cells
B. 4 gametes
Answers
Answer:
B
Explanation:
What does evolution mean in biology?
change in species over time
change in individuals over time
change in theories over time
change in ecosystems over time
Answers
Answer:
Evolution
Change in species over time.