What method can be used to determine different bacteria cell wall types?
Answers
The Gram staining method is commonly used to determine different types of bacterial cell walls. This technique was developed with involves staining bacterial cells with crystal violet followed by iodine and a counterstain, typically safranin.
The Gram staining method distinguishes between two main types of bacterial cell walls based on their reaction to the staining procedure. Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, which retains the crystal violet-iodine complex and appears purple under the microscope. In contrast, Gram-negative bacteria have a thinner layer of peptidoglycan and an outer membrane that contains lipopolysaccharides, which are not stained by the crystal violet-iodine complex but can be counterstained with safranin to appear pink under the microscope.
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Related Questions
finish the passage
The reactants for cellular respiration are the __________ for photosynthesis. The products of cellular respiration are the _______
of photosynthesis.
Answers
The reactants for cellular respiration are the glucose and oxygen for photosynthesis. The products of cellular respiration are carbon dioxide, water, and ATP of photosynthesis.
Which of the following contributes most to promoting sustainability in an ecosystem?
A. Lack of decomposers
B. A balanced water table
C. Variety of organisms
D. A narrow temperature range
Answers
Answer:A
Explanation:
A variety of organisms contributes most to promoting sustainability in an ecosystem. Hence, option C is correct.
What is an ecosystem?An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interacting with the weather, environment, and other factors. Abiotic variables, or nonliving components, coexist with biotic components in ecosystems.
Based on their overall environments, ecosystems can be divided into three basic categories: freshwater, marine, and terrestrial. Individual ecosystem types based on the environmental habitat and creatures present can be found within these three categories.
A variety of organisms contributes most to promoting sustainability in an ecosystem. Hence, option C is correct.
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the structure of the ileum and features. why is it effective?
Answers
Answer:
The function of the ileum is mainly to absorb vitamin B12, bile salts, and any products of ... average distance traveled by the nutrient molecules, so the effectiveness of diffusion increases.
An informational pamphlet in a health clinic describes an interaction between body systems.
5
An ovum moves from an ovary into the
uterine tube where its migration toward
the uterus is aided by the peristaltic
contractions of the smooth tissues of the
uterine tube's walls
6
7
Which statement identifies the body systems that are directly involved in the interaction
described and explains how they accomplish the interaction?
00
A The nervous system produces hormones that stimulate the ovum, and the circulatory
system moves the ovum into the uterine tube.
9
B The circulatory system supplies the uterine wall with oxygenated blood, and the
immune system prevents damage to the ovum. -
C The reproductive system produces the ovum, and the muscular system causes the
migration of the ovum by peristaltic contractions.
10
D The excretory system expels the ovum from the ovary, and the nervous system causes
the contractions of the smooth tissues of the uterine wall.
Answers
Answer: c
Explanation:
Answer:C
Explanation: its c
What is the main advantage to using satellites to measure climate change? a. they can measure aspects of climate globally. b. they are unaffected by the weather conditions they measure. c. they are a universal tool for measuring all factors of climate. d. they can measure the amount of rainfall a specific area receives. please select the best answer from the choices provided a b c d
Answers
The correct option is A ; Satellites in a low earth orbit can directly monitor the climate from their position within or just above the atmosphere, and can provide near-global coverage as they scan over different swathes of ground with each orbit.
Satellites are suitable for monitoring climate change because they can measure the concentrations of greenhouse gases in the atmosphere, such as aerosols, water vapor, carbon monoxide (CO), carbon dioxide (CO2), and methane.
Satellite data helps us understand the climate system by allowing us to monitor greenhouse gas concentrations, weather patterns, sea levels, temperature, vegetation health, melting glaciers and polar ice, coral reef bleaching, ocean pollution, and changes in wildlife migratory patterns, among other things.
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What has happened over the past forty years that might have changed things in california water
Answers
Explanation:
Overall, 25% of California adults named water shortages and drought as the most important environmental issue currently facing the state. Not far behind, 17% named wildfires, followed by 13% who cited climate change and 6% who named air pollution.
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Please Help I NEED IT ASAP! Systems, including cars, require an energy input. Where does a car as a system, gets its energy?
Answers
Answer:
Gas (Chemical Energy)
Explanation:
Cars run on gas. They convert the chemical energy in the gas to motion. This is where the system gets its energy. (Unless your system is the car and it moves beacuse is on a hill in which case gravitational potential energy transfers energy to this system).
PLEASE HELP!!!
How does being made of many cells help large organisms maintain homeostasis?
Answers
what makes rna and dna polymerase different? select all that apply.
Answers
Answer:
RNA polymerase is the main enzyme in RNA replication and has a lot more jobs than DNA polymerase. In DNA replication, DNA polymerase has helicase, ligase, primase and topoisomerase.
Explanation:
How far away is the moon from earth?
Answers
Answer:
238,900
Explanation:
and heres dark humor
"I have good and bad news," the doctor said to his patient. "Give me the good news first," the patient said. "Your test results are back," the doctor said, "and you have only two days to live." "That's the good news?" the patient exclaimed. "What's the bad news?" "I've been trying to reach you for two days."
Answer:
238,900 mi
Explanation:
it can be found
which mineral's absorption is enhanced greatly by vitamin c? chromium iron manganese sulfur
Answers
Iron absorption is greatly enhanced by vitamin C.
Among the minerals mentioned, the absorption of iron is greatly enhanced by vitamin C. Iron is an essential mineral that plays a crucial role in carrying oxygen throughout the body and supporting various metabolic processes. Vitamin C, also known as ascorbic acid, is a potent enhancer of iron absorption when consumed together. Iron exists in two forms: heme iron, which is derived from animal sources, and non-heme iron, which is found in plant-based foods. Vitamin C predominantly enhances the absorption of non-heme iron. It forms a soluble complex with non-heme iron, which improves its solubility and bioavailability, thus facilitating its absorption in the intestines. Consuming vitamin C-rich foods or supplements in conjunction with iron-rich foods or iron supplements can help increase the absorption of iron. This is particularly beneficial for individuals at risk of iron deficiency, such as vegetarians or individuals with limited iron intake.
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The __ is the person who sources and secures the financing for the a film production
Answers
Answer:
A film producer
Explanation:
hope this helps
Signal transduction
The figure below refers to signal transduction from a G protein-associated ligand.
1. Add an example ligand.
2. Identify what type of receiver is outlined in the image
3. Describe the processes between the different molecules
4. Describe the cellular response
Answers
When a relevant ligand activates a GPCR, the receptor undergoes a conformational change that allows the receptor to transmit the external signal into the cell.
What do you mean by receptor ?
Receptors are biological transducers that translate electrical impulses from both internal and exterior environments.
They can be dispersed, like those of the skin and viscera, or they can be massed together to create a sense organ, like the eye or ear.
The majority of cellular reactions to external stimuli are mediated by G protein-coupled receptors (GPCRs).
When the receptor is activated by a ligand, it attaches to a heterotrimeric G protein partner and encourages the exchange of GTP for GDP, which causes the G protein to dissociate into the subunits and, which regulate downstream signals.
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Researchers have been studying the evolution of bighorn sheep in response to trophy hunting at Ram Mountain, Canada, since 1973. This population was intensively hunted until 1996, when hunting regulations increased the minimum size of the horns of rams (males) that could be shot, after which the number of rams killed by hunters each year decreased dramatically. More recently, researchers observed that, in response to the selective pressure imposed by the hunters, the average horn length of rams decreased by almost 30% between 1973 and 1996. After hunting pressure decreased in 1996, horn length rebounded, increasing by about 13%. Which evolutionary mechanism likely underlies born length in the bighorn sheep population? O genetic drift natural selection speciation inbreeding
Answers
The evolutionary mechanism that likely underlies horn length in the bighorn sheep population at Ram Mountain, Canada is natural selection.
Researchers observed a significant decrease in average horn length of rams between 1973 and 1996, which coincided with intense trophy hunting. This suggests that hunters were selectively targeting rams with larger horns, leading to a decrease in the average horn length over time. However, after hunting regulations were implemented in 1996, which increased the minimum horn size for hunting, the number of rams killed decreased, allowing individuals with longer horns to survive and reproduce. This resulted in a rebound in horn length, indicating that natural selection favored individuals with longer horns.
Natural selection is a fundamental mechanism of evolution that acts on heritable traits within a population. In this case, the selective pressure imposed by trophy hunting exerted a strong influence on horn length in bighorn sheep. The initial decrease in average horn length can be attributed to selective hunting of rams with larger horns, as those individuals were more likely to be targeted and killed by hunters. This artificial selection altered the genetic composition of the population, favoring individuals with shorter horns.
However, when hunting regulations were modified to protect rams with shorter horns, the selective pressure was alleviated, allowing individuals with longer horns to have higher reproductive success. Over time, this led to an increase in average horn length as the genetic trait for longer horns became more prevalent in the population.
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A large number of deaths due to bovine spongiform encephalopathy (mad cow disease) were reported among retires of farm workers. Because of this, investigators formed a cohort of farm workers using insurance claims data. The farm workers who actually worked with livestock would be the exposed group, while veterinarians might constitute the unexposed group. This study design is an example of_______? • A. Cohort, prospective • B. Case-control • C. Clinical trial • D. Cohort, retrospective
Answers
The study design described in the scenario is an example of a retrospective cohort study. The correct answer is D. Cohort, retrospective
A cohort study is an observational study that follows a group of individuals over time to investigate the relationship between exposure to certain factors and the development of outcomes or diseases.In this case, the investigators formed a cohort of farm workers using insurance claims data, which means they selected individuals who had a history of working on farms.The study design is retrospective because the investigators are looking back at past data (insurance claims) to determine the exposure status of the individuals.They identify the exposed group as farm workers who actually worked with livestock and the unexposed group as veterinarians.
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Which part of the body is the maxilla bone located?.
Answers
Answer:
upper jaw
Explanation: The maxilla is the bone that forms your upper jaw. The right and left halves of the maxilla are irregularly shaped bones that fuse together in the middle of the skull, below the nose, in an area known as the intermaxillary suture. The maxilla is a major bone of the face.
Chapter 13 Core Content Connecting the Concepts: Evidence of Evolution Connecting the Concepts: Evidence of Evolution Can you place each example into the appropriate category of scientific evidence of evolution? Part A Sort the examples into the appropriate bins. transitional forms that link whales with land-dwelling ancestors that are now extinct 「development of pesticide changes in average beak size in finches following dry or wet years resistance in insects unique collection of marsupial mammals in Australia similar forelimb anatomy in different species of mammals same genetic language c and similar genes in ye fruit flies, and humas resemblance of island species to nearby mainland species anatos observation of natural selection in action fossil record biogeography IS Type here to search
Answers
Observations of natural selection in operation, the fossil record, biogeography, and anatomical and molecular homologies are all in accordance with the presented assertion.
Natural selection being observed in action
Insect pesticide resistance developmentVariations in finch beak sizes on average after wet or dry yearsFossile history
the finding of several dinosaur species' bonesintermediate creatures that connect whales with extinct land-dwelling relativesBiogeography
Australia has a rare array of marsupial animalsSimilarity between island species and those on the surrounding mainlandMolecular and anatomical similarities.
Different species of animals have forelimb structure that is comparable.Similar genes and the same genetic code exist in humans, fruit flies, and yeasts.To know more about Evolution visit:
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What will most likely happen if a person does not consume the minimum daily requirement of carbohydrates?
Answers
If a person does not consume the minimum daily requirement of carbohydrates then the body will use stored glycogen and the person will look unhealthy and become weak after some time.
Importance of carbohydrates: Like other nutrients, carbohydrates are also very essential for various functions of the body. Carbohydrates such as glucose are required for instant energy and day-to-day activities. If there is no or less amount of carbohydrate in the body then our body will start converting the glycogen that is stored in the liver into glucose. After some time, the person will start to appear unhealthy, thin and weak if there is no minimum daily requirement of carbohydrates is met.To know more about carbohydrates, refer:
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How are the words system and ecosystem related?
Answers
Answer:
Well, almost everything. The term ecosystem was coined in 1935, though ecosystems have been around as long as living things. Eco is a spin-off from the word ecology and describes anything having to do with the environment and our relation to it. ... And system comes from the Greek word systema or "organized body, whole.
Explanation:
When a young, vigorously growing culture of bacteria is transferred to fresh medium of different composition, the lag phase is usually short or absent. (T/F)
Answers
True. When a young, vigorously growing culture of bacteria is transferred to fresh medium of different composition, the lag phase is usually short or absent.
This is because the cells are already adapted to the growth conditions and do not need to undergo a period of adjustment before resuming growth. In contrast, when a culture is transferred to a medium of the same composition, there may still be a lag phase as the cells adjust to the new environment. During the lag phase, bacteria are synthesizing new enzymes and adjusting to the new nutrient availability in the medium. Once this adjustment period is over, the bacteria enter the exponential phase, where they rapidly grow and divide. The length of the lag phase can vary depending on the specific bacteria, the composition of the medium, and the growth conditions. However, in general, a short or absent lag phase is an indication that the bacteria are well-adapted to their environment and can quickly resume growth.
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Which one is NOT a part of the cycles of matter?
A. Carbon
B. Uranium
C. Water
D. Phosphorus
Answers
Answer:Uranium
Explanation:
5.Which of these is an example of the body where homeostasis is
maintained?
A. The pH level of urine drops, causing a crystal formation. This leads to blocking of
urine and urine infection
B. The pH level of blood drops due to excess amount of CO2. The brain sends signal to
the diaphragm to increase breathing in order to get rid of excess CO2
C. The excess amount of allergens in the air causes inflammation in the lungs. This
makes breathing difficult
O D. Pelvic floor dysfunction causes stool to dry out. This leads to constipation.
Answers
Answer:
i believe its B.) The pH level of blood drops due to excess amount of CO2. The brain sends signal to
the diaphragm to increase breathing in order to get rid of excess CO2
Explanation:
i hope this helps
im really sorry if its wrong
of these three types of electromagnetic waves which has the longest wavelength?
A. ultraviolet
B. visible
C. infrared
D. It all will have the same wavelength
Answers
The electromagnetic wave with the longest wavelength is ; ( C ) Infrared
The electromagnetic wave with the longest wavelength from the listed electromagnetic waves is the Infrared with a wavelength of around 10⁻5 m.
Difference between wavelengthsThe longer the wavelength of an electromagnetic wave the shorter the frequency of the wave because the wavelength of an electromagnetic wave is calculated as ; λ = c/f
Where :
c = velocity f = frequency λ = wavelengthHence we can conclude that The electromagnetic wave with the longest wavelength is ; Infrared
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What molecule do bacteria take in (use up)?
Oxygen
Carbon Dioxide
Water
(This is 7th grade science)
Answers
What could explain the significant increase in antibodies to non-Lyme disease antigens (blue line)?
Answers
What is first immune response?
First immune response is the initial reaction of the immune system to invading microorganisms which includes the formation of memory B cells.
That is to say, upon the first exposure of invading antigens such as non-Lyme disease antigens, the body will generate antibodies together with memory cells that will fight against the non-Lyme disease antigen should in case a second exposure occurs.
When a second exposure finally occurs, as seen in the image, the memory B cells already generated in the first exposure would release a high amount of antibodies to fight the non-Lyme disease.
anyone know this? please help
Answers
State one similarity and one difference between parasitic and predatory modes of feeding
Answers
Answer:
One similarity between parasitic and predatory modes of feeding is that both involve the ingestion of other organisms for nutrition. In both cases, the organisms that do the feeding (the parasites or predators) obtain their food from other organisms (the host or prey), which they consume and use to nourish themselves.
One difference between parasitic and predatory modes of feeding is the relationship between the predator and its prey. In predatory feeding, the predator and its prey are typically separate and distinct organisms, and the predator actively hunts and kills its prey for food. In parasitic feeding, the parasite and its host are typically closely associated, and the parasite typically lives on or inside the host, feeding off of its nutrients or tissues. This relationship between the parasite and its host is often harmful to the host, while the relationship between the predator and its prey is typically not harmful (as long as the predator is not over-consuming its prey).
what finding let Hershey and chase to conclude that the information viruses transfer into bacteria in stored in DNA ?
Answers
Hershey and Chase conducted an experiment in 1952 to determine whether DNA or proteins carried genetic information in viruses.
How did they labeled the DNA ?They labeled the viral DNA with radioactive phosphorus and the viral proteins with radioactive sulfur. The labeled viruses were allowed to infect bacterial cells, and the bacteria were then separated from the viral coats using a blender.
The researchers found that the radioactive phosphorus, and thus the DNA, was present in the bacterial cells but that the radioactive sulfur, and thus the proteins, remained in the viral coats.
This finding led Hershey and Chase to conclude that the genetic information viruses transfer into bacteria is stored in DNA, providing crucial evidence for the role of DNA in genetic inheritance.
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All living things have __________________________.
Answers
Answer:
Nocuternal
Explanation:
Which field studies viruses and bacteria and
how they evolve and respond to their
surroundings?
A. ecology
B. biotechnology
C. evolution of diseases
D. the Tree of Life field
Answers
Answer:
A. Ecology
Explanation:
Ecology is the branch of biology dealing with the relations and interactions between organisms and their environment, including other organisms. Ecologists study the relationships between organisms (and plants/animals) and their environment.
Answer: The answer is evolution of diseases.
Explanation: