If instead of start ing with a broth culture, you need to develop a pure culture from solid media, what would you do differently?
Imagine that a colony on your agar plate was formed by both a Gram-negative bacterium that com- monly inhabits the mammalian digestive tract and (i) a Gram-positive marine bacterium.What culture medium and incubation parameters would you consider before developing a pure culture from the Gram-negative bacterium? (clue: selective media) 8 LAB 10 Obtaining Pure Culture
Answers
approach for developing pure culture from stable media is by doing it the use of streak plate method.
Can a pure culture be organized at once from a mixed broth culture?Answer and Explanation: A pure culture can't be received directly from a mixed-broth culture. In order to reap a pure tradition from a combined broth, you would need to function one of the following culture techniques: a streak plate, a sequence of pour plates, or dilutional broths.
Explain. Yes, the components from the mixed lifestyle just need to be separate first. This can be accomplished with the aid of doing a streak plate or diluting the mixture and the use of a spread-plate technique.
Obtaining a pure subculture of bacteria is generally completed by spreading bacteria on the floor of a stable medium so that a single mobile occupies an remoted component of the agar surface. This single mobile will go thru repeated multiplication to produce a seen colony of comparable cells, or clones.
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What is one piece of evidence that supports the theory that mitochondria evolved from prokaryotic cells?
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One piece of evidence that supports the theory that mitochondria evolved from prokaryotic cells is that mitochondria have their own circular DNA, which is similar to the DNA found in prokaryotic cells.
This DNA is also not bound by a nuclear membrane, which is a characteristic feature of eukaryotic cells. Additionally, mitochondria have their own ribosomes, which are more similar to prokaryotic ribosomes than to eukaryotic ribosomes.
These similarities suggest that mitochondria were once free-living prokaryotic cells that were engulfed by ancestral eukaryotic cells and developed a symbiotic relationship with them over time. This theory is known as the endosymbiotic theory of mitochondrial evolution.
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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:
This diagram shows DNA fingerprints for a child and four adults.
Which adult is most likely a parent of the child?
Answers
Answer:
probably parent 4 but I could be wrong bc look at the bottom of the scans the match kind of.
Explanation:
Answer: Adult 4
Explanation: There patterns match they are similar. :)
Identify the characteristics of allosteric regulation of glycogen phosphorylase in the muscle and liver. Glycogen phosphorylase in muscle Glycogen phosphorylase in liver Activation generates glucose for the cell. Activation liberates glucose for export. b form is the default state. a form is the default state. Glucose binding induces T state. AMP binding induces R state.
Answers
The allosteric regulation of glycogen phosphorylase in muscle and liver exhibits distinct characteristics.
In muscle tissue, glycogen phosphorylase it activates generates glucose for the cell while in liver, glycogen phosphorylase it activates liberates glucose for export.
In muscle tissue, glycogen phosphorylase b form is the default state while in liver, glycogen phosphorylase a form is the default state.
In muscle tissue, glycogen phosphorylase is regulated by glucose binding, which induces a conformational change and leads to the T state (inactive form) of the enzyme while on the other hand in liver, glycogen phosphorylase is regulated by the binding of AMP (adenosine monophosphate), which induces the R state (active form) of the enzyme.
In muscle tissue, glycogen phosphorylase is regulated to provide glucose for energy production within the muscle cell. The default state of glycogen phosphorylase in muscle is the b form. When activated, it converts glycogen into glucose-1-phosphate, which can be used for glycolysis and ATP generation within the muscle.
In contrast, glycogen phosphorylase in the liver is regulated to liberate glucose for export to other tissues, particularly to maintain blood glucose levels. The default state of glycogen phosphorylase in the liver is the a form. Activation of glycogen phosphorylase in the liver results in the breakdown of glycogen, releasing glucose molecules that are transported to the bloodstream for distribution to other cells and tissues.
The binding of glucose induces the T state of glycogen phosphorylase in muscle, while the binding of AMP induces the R state. This means that glucose promotes the inactive form of the enzyme, whereas AMP promotes the active form. The exact mechanisms of allosteric regulation differ between muscle and liver, reflecting their distinct physiological roles in glucose metabolism and homeostasis.
In summary, allosteric regulation of glycogen phosphorylase in muscle and liver serves different metabolic purposes. In muscle, it generates glucose for intracellular energy production, while in the liver, it liberates glucose for export to other tissues to maintain blood glucose levels. The default states, regulatory molecules (glucose and AMP), and resulting enzyme conformations differ between muscle and liver, reflecting their specific metabolic functions.
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Absorption spectroscopy is a technique used to determine the composition of a substance. Each substance tends to behave consistently in terms of which types of radiation it absorbs. When a material absorbs a unique set of different colors of visible light, the characteristic set of color bands observed through a spectroscope is the material's spectrum. The spectra of two stars are shown below.
Modified image courtesy of NASA
Star 1 is a nearby star and star 2 is a similar type star much further away from Earth. When comparing the spectra, the lines in the spectra for star 2 are closer to the red end of the light spectrum. This is called red shift.
From this type of information, scientist believe that most stars in the universe are moving away from each other and from the Earth. How can redshift be used as evidence to support the Big Bang theory?
A.
It provides evidence that some stars remain motionless while others move rapidly, showing that the universe is expanding in very few areas.
B.
It provides evidence that some stars are pulled toward a point source, and some move away from a point source, showing the universe may be contracting.
C.
It provides evidence that stars are moving away from a single point of origin, showing that the universe is expanding.
D.
It provides evidence that stars are moving closer to a single point of origin, showing that the universe is contracting.
Answers
Answer:
It provides evidence that stars are moving away from a single point of origin, showing that the universe is expanding.
Explanation:
If water were a nonpolar molecule , how would its properties be different ? A. Water would be able to form hydrogen bonds. B. Water would stick together much more strongly . C. Water would not be able to climb up inside plants. D. Water would be a much heavier molecule .
Answers
Answer:
Cohesiveness, adhesiveness, and surface tension: would decrease because without the +/-‐ polarity, water would not form hydrogen bonds between H20 molecules.
Explanation:
Please give me brainlist answer
Answer:
The correct answer is obviously B. water would stick together much more strongly
Explanation:
Have a nice day^^
A water pipe bursting in the winter is a result of which type of weathering?
A. Biological
B. Exfoliation
C. Chemical
D. Freeze-thaw
Hurry!
Answers
B. Exfoliation
Answer:
D
because water expands when it freezes
Place the organisms or events in order from when they first appeared on Earth to present (MA = millions of years ago and TA = thousands of years ago)
Usatestprep timeline need help
Answers
Hello. You have not informed which bodies the question refers to, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
As you may already know, a timeline is a diagram that shows the events that occurred in a given period of time. In this case, to answer your question, you must make a timeline and start presenting organisms and events from the oldest to the youngest, beginning to build the timeline from right to left.
Regarding organisms, we can say that fungi and plants are the oldest and arose about 500 million years ago. Then came the insects and arachnids, followed by the amphibians and then the mammals and finally the birds.
Cells that have lots of gap junctions must have which of the following properties? Pick one answer
A. They must be able to resist large amounts of shearing forces.
B. They must be able to communicate with each other very rapidly.
C They must be able to form a barrier.
D. They must be able to recycle chemicals that they have released.
Answers
Answer:the correct answer is c because they must form a barrier to prevent the gaps from interfiering with bonding with atoms.
Explanation:
Answer:
Gap junctions are specialized channels that allow direct communication and transfer of small molecules and ions between adjacent cells option A is the correct answer
Explanation:
Gap junctions are composed of connexin proteins that form hexagonal channels, also known as connexons, in the cell membranes of adjacent cells. The connexons of two neighboring cells come together to form a gap junction, creating a direct pathway for communication between the two cells.
Research on gap junctions has led to the development of drugs that can modulate their function, which may have therapeutic applications for various diseases. Additionally, advances in imaging techniques have allowed for the visualization of gap junctions in live cells, providing insights into their structure and function.
In conclusion, gap junctions play a crucial role in intercellular communication, and their study has led to important insights into various physiological processes and disease mechanisms. Further research on gap junctions may lead to the development of new therapeutic approaches for various diseases.
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ABOUT NATURAL SELECTION
Answers
Answer:
B
Explanation:
A Mitosis inhibitor is a medication that is designed to prevent mitosis in certain cells why would these be helpful in the treatment of tumors
Answers
Answer: It would be helpful because the cells that cause tumors would not undergo Mitosis.
In terms of making biofuel, which farm crop would result in the largest amount of oil produced per acre of crop? Select one: a. Algae b. Corn Oil c. Corn d. Soybeans
Answers
Option A: In terms of making biofuel, the farm crop that would typically result in the largest amount of oil produced per acre of crop is Algae.
Algae are known for their high oil content, which can be extracted and converted into biofuel. Algae have a fast growth rate and high oil productivity, making them an attractive option for biofuel production. They can be grown in large quantities in relatively small areas, such as ponds or bioreactors, maximizing the oil yield per acre.
However, compared to algae, the oil content and yield per acre in other crops mentioned here are generally lower. Corn and soybeans are typically cultivated for their primary agricultural uses, such as food crops or animal feed, rather than as dedicated oil crops.
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How to determine the inputs and outputs of carbon dioxide in the atmosphere.
Answers
Answer:
change in concentration maybe...
Sort the examples and descriptions into two categories: density-dependent limiting factors and density-independent limiting factors.
Answers
The population’s size is constrained by limiting forces. Abiotic and biotic variables, such as the existence of predators, are examples of limiting factors (e.g., water resources).
Density-dependent While independent factors are unrelated to a population’s density, limiting factors have an impact on a population’s size as a function of density.The following are the density-dependent limiting factors:Competition Disease and parasitism as a region’s population grows, so does the population’s density, which amplifies their effects.The population size is affected by factors dependent on population density by altering the rate of reproduction and survival.Environmental extremes (such as a hurricane or drought) These factors typically have an impact on both small, dispersed populations and big, dense populations because they have an impact on all populations residing in a given area.
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In the previous question a heterozygous three toed dragon mated with a heterozygous three toes male. What is the probability that their offspring will have three toes?
Question 14 options:
25%
50%
75%
Answers
A heterozygous male three-toed dragon and a heterozygous female three-toed dragon mated. Any offspring of parents who are heterozygous have a 75% probability of being born with three toes.
A dominant allele has a 75% chance of being inherited by the offspring if both parents are heterozygous and afflicted. To find all potential genotypic pairings in the parents, utilize a Punnett square. There are a few crucial differences in a pedigree that shows a dominantly inherited characteristic.
A mating experiment between two organisms equally hybrid for two traits is referred to as a dihybrid cross. A heterozygous organism is one that possesses two distinct alleles at a certain genetic location, making it a hybrid. The traditional Mendelian ratio for a dihybrid cross in which the alleles of two different genes assort independently into gametes is 9:3:3:1, and it can be used to predict the phenotypic ratio.
As a result, we may state that there is a 75% chance that any offspring of heterozygous parents (WW) will have three toes.
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true or false the larger an object's mass, the more gravity it will have
Answers
Answer: True
Explanation:
Gravitational force is an attraction between masses. The greater the size of the masses, the greater the size of the gravitational force (also called the gravity force).
what are extinct animals ?
Answers
How many of each molecule is there (H2O and co2 molecules)
6h2o + 6co2
Answers
Answer:
Six of each.
Out of the three physical states: ice, liquid water and vapor, why do you think water exists as a liquid the most o n our planet?
Answers
I think it is because of the temperature of the earth.
If ice was the most common physical state on our earth it would be because of how cold it would be. Other way around with vapor.
Choose an example of a bacteria and an example of a virus that can cause illness in humans and compare the contribution each type of organism makes to the disease process briefly. e.g. How they infect and enter the host, what happens to infected cells or tissues, what causes the pathology, and how they spread to another host.
Answers
An example of a bacteria that can cause illness in humans is Streptococcus pyogenes that cause a range of infections like strep throat, scarlet fever.
Another example of a virus that can cause illness in humans is the influenza virus, which causes the flu.
What is their mode of operation?The bacteria and viruses spread to another host through different means, such as direct contact with infected individuals any bodily fluids, contact with contaminated surfaces or objects, and airborne transmission through respiratory droplets or aerosols.
Bacteria in most cases also spread through vectors such as ticks or fleas, while viruses on their own part spread through animal or vectors like the mosquitoes.
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which of these statements about enzyme inhibitors is true?
Answers
The action of inhibitors may be both either reversible or irreversible is trues about enzyme inhibitors.
What is enzyme inhibitors?
A chemical that binds to an enzyme and inhibits its activity is termed as an enzyme inhibitor. Proteins are referred as enzymes speed up the chemical processes that turn substrate molecules into products and are essential for life. An enzyme inhibitor is what? Inhibitors of enzyme activity are chemicals that bind to the enzyme without altering the protein structure of the enzyme.
Enzyme inhibition reactions come in three different varieties.
The inhibition of competition.Inhibitive non-competition.Inhibitive Non-Competition.To know more about enzyme inhibitors visit
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When a person receives a transplanted organ,
many medications are necessary to keep the
organ from being rejected. The process of organ
rejection is similar to the one involved in
(1) the growth of cancerous tissue
(2) an allergic reaction
(3) a genetic mutation
(4) the production of an antigen
Answers
The right response is (2) An allergic reaction.
The body recognizes a transplanted organ as foreign and attempts to attack it, resulting in rejection. This interaction is like a hypersensitive response, where the insusceptible framework erroneously distinguishes an innocuous substance as a danger and assaults it.
Immunosuppressants are medications that reduce the immune system's ability to attack the transplanted organ and prevent organ rejection in patients. To prevent rejection, these medications must be taken for the patient's entire life.
There is no direct connection between organ rejection and the development of cancerous tissue, genetic mutations, or the production of antigens.
The following can be used to explain the incorrect responses:
(1) The process by which cells divide and grow out of control to form a tumour is Organ rejection and has nothing to do with this procedure. growth of cancerous tissue.
(3) A change in the DNA sequence that has the potential to alter a protein's structure or function is known as a genetic mutation. Although genetic factors may increase the likelihood of organ rejection, the rejection process itself is not caused by genetic mutation.
(4) The creation of an antigen is an ordinary piece of the resistant reaction, where the body produces particles that perceive and tie to unfamiliar substances, for example, infections and microbes. In organ rejection, the immune system produces antibodies against the transplanted organ as well, but this is unrelated to the production of an antigen.
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If a bird can fly and a duck can swim and a whale can float what animal can do all 3 but better without looking?
Answers
Answer:
Your MOM JK A HUMAN
Explanation:
Answer:
hm...... ur mom
Explanation:
ate that fr
What is the main function of the circulatory cardiovascular system?
Answers
The circulatory system eliminates waste items like carbon dioxide and delivers nutrition, hormones, and oxygen to cells.
Your heart and blood arteries make up your circulatory system, commonly referred to as your cardiovascular system. It functions to carry oxygen and other nutrients to all of your body's organs and tissues. Carbon dioxide and other waste materials are also removed. You need a healthy circulatory system for both your physical and mental well-being. Continue reading to learn more about the circulatory system, how it works, and what you can do to maintain the health of your heart and blood vessels.
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The two sides of the heart can be described as
A. Symmetrical- the left is just like the right
B. Asymmetrical- the right ventricle is thicker than the left
C. Asymmetrical- the left ventricle is thicker than the right
D. Variable- it is different in different animals
Answers
Answer:
The answer is C. Asymmetrical- the left ventricle is thicker than the right
Explanation:
The left ventricle has to pump the blood further around the body, and against higher pressure, compared with the right ventricle.
Select the correct statement concerning skin cancer. Select one: A. Basal cell carcinomas are most malignant. B. Melanomas must be removed early to prevent them from spreading. C. Basal call carcinomas are the least common. D. Most tumors that arise on the skin are cancerous.
Answers
Answer:
The answer is B
Explanation:
All forms of melanoma are better off if removed especially Malignant Melanoma (the most dangerous) And for future reference here are the three main ones in order
Basal Cell carcinoma (Most common, least harmful)
Squamous Cell Carcinoma (Mid, Mid)
Malignant Melanoma (Least common, most fatal)
Look at the diagram and answer the questions
please be quick
Answers
diluted - has a high level of water
dilute because it has a high level of acid, which causes burns and catches fire easily.
because the acid gets diluted with water which leads to the burns to stop happening.
50g of acid in 100ml
Tyler is admitted to the hospital after an accident. In the hospital, Tyler overhears the doctor telling his mom that although he has a fracture in the axial skeleton, he’s lucky because the bone doesn’t protect any vital organ that’s essential for survival. Which bone has Tyler fractured? the front view of the major bones of the axial system
A. mandible B. rib C. sternum D. vertebral column
Answers
The correct answer is B. rib.
The ribs are a part of the axial skeleton and are located in the chest region. They serve to protect vital organs such as the heart and lungs. However, in this scenario, the doctor mentions that the fractured bone does not protect any vital organ essential for survival. The mandible (jawbone) is not part of the axial skeleton but rather the appendicular skeleton.
The sternum (breastbone) is an important bone in the axial skeleton, protecting the heart and connecting the ribs, but it is not mentioned as the fractured bone in this case. The vertebral column (spine) is crucial for protecting the spinal cord, which is vital for overall body function. Therefore, the rib is the most likely bone that Tyler has fractured, as it is mentioned that the fracture does not involve a bone protecting a vital organ necessary for survival.
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Which of the following is not a form of passive transport?
A. Diffusion
B.endocytosis
c. osmosis
Answers
Answer:
A. Diffusion This type of transport requires no energy for it to occur.
For example, if someone on the other side of the room lets a silent fart out there is no need for anyone to use their energy for those fart particles to reach your nose, it just happens... same with diffusion. it will happen, just give it time.
which substance are necessary for the synthesis of most material in organism
Answers
Answer:
yes
Explanation: