Answers
Answer:
Explanation:
An antimicrobial agent is a natural or synthetic chemical that kills or inhibits the growth of microorganisms. Bacteria have a mechanism of transferring genomic material called horizontal gene transfer, the movement of genes between cells that are not direct descendants of one another. Horizontal gene transfer allows cells to quickly acquire new characteristics and drives metabolic diversity. One of the characteristics usually acquired is the resistance to antibiotics.
Three mechanisms of genetic exchange are known in prokaryotes:
(1) transformation, in which free DNA released from one cell is taken up by another; (2) transduction, in which DNA transfer is mediated by a virus; and (3) conjugation, in which DNA transfer requires cell-to-cell contact and a conjugative plasmid in the donor cell.
Examples of genes transferred by transducing bacteriophages include multiple antibiotic resistance genes among strains of Salmonella enterica serovar Typhimurium, Shiga-like toxin genes in Escherichia coli, virulence factors in Vibrio cholerae, and genes encoding photosynthetic proteins in cyanobacteria.
Conjugative plasmids use a mechanism to transfer copies of themselves and the genes they encode, such as those for antibiotic resistance, to new host cells.
Related Questions
Which of the following changes in deciduous forests occurs in the spring?
A. Trees regain their leaves.
b. Trees block the flow of water and nutrients to their leaves.
C.The leaves of trees begin to lose their chlorophyll.
d. Trees live off of stored nutrients.
Answers
Answer:
A. trees regain their leaves.
Explanation:
edge 2020
How does exponential growth differ from logistic growth? R‐selected species have exponential growth rates, whereas K‐selected species always experience logistic growth. Exponential growth occurs when the population is at its biotic potential, whereas logistic growth is limited by the carrying capacity of the environment. Exponential growth is expressed as doubling time, whereas logistic growth is expressed as a percentage change. Exponential growth occurs when a population is very large, whereas logistic growth occurs when a population is at its minimum viable number. Exponential growth results in a J‐shaped curve, whereas logistic growth results in an S‐shaped curve.
Answers
Answer:
Exponential growth occurs when the population is at its biotic potential, whereas logistic growth is limited by the carrying capacity of the environment.
Explanation:
A population that exhibits a logistic growth model, depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.
If the population size, N, is inferior to K (N<K) the population can still grow. When N approximates to K, the population´s growth speed decreases. When N=K, the population reaches equilibrium, and when N is superior to K (N>K) the population must decrease in size because there are not enough resources to maintain that size.
The sigmoid curve represents the logistic growth model. At the beginning population grow slowly. In the exposed example this occurred when the small group of 10 foxes moved to the new environment, starting a new population. In the second stage, the population size increases rapidly. Probably this happened when foxes reached a number of 40 individuals. And finally, slow and gradually, the population reaches the equilibrium point, K, which depends on resource availability. This point belongs to the stage where food starts to become harder to find, and much of the living space is occupied.
A population that exhibits an exponential growth model increases in proportion to its size. The increase in the population size depends on the individual´s reproduction rate: a population that grows at constant exponential rate gains individuals faster as the population increases in size.This model is based on unlimited resource availability which means that there is no effect depending on density. There is no competition for resources. Natality and mortality rate do not depend on density. There is a constant growth rate per capita and it is proportional to the population size.
Clio has a vegetable garden and wants to increase the amount of nitrogen in the soil how can she most likely do this.
Please help me
Answers
Enzymes are proteins that speed up reactions by
Answers
Answer:
lowering the activation energy needed for the reaction to start
Answer:
lowering the amount of energy required
Explanation:
These two substances can enter a cell through the phospholipids. Oxygen and carbohydrates Carbon dioxide and sugar Oxygen and sugar Oxygen and Carbon Dioxide
Answers
Answer:
Oxygen and Carbon Dioxide
Explanation:
Oxygen and carbon dioxide can enter cells through the phospholipid bilayer through simple diffusion with the concentration gradient.
This is because these substances are small and uncharged.
Other molecules like sugars and carbohydrates are too big to enter through the phospholipids.
A substance in which other substances dissolve is called a solute. true or false
Answers
Explanation:
Hey there!
The answer is false.
Because, Those substances in which other substances dissolve are called solvent.
And those substances which dissolves in solvent are called solute.
Hope it helps...
Which of the following is not true regarding how organisms are able to exchange information via cell signaling in response to both internal changes and environmental cues?a. Cells communicate by direct contact.b. Cells communicate over both short and long distances.c. Hormones are reached by all cells but only target some cells.d. Secreting cells affect all neighboring cells
Answers
Answer:
Secretory cells affect all neighboring cells
Explanation:
The secretory cells affect only the cells that contain the receptor for the hormone they release, that is why it does not matter if the cell is contiguous, adjacent or distant, the target cell will only be affected by the hormone regardless of the proximity because it has a specific receptor.
What happens during telophase II of meiosis?
Answers
Answer:
A nuclear envelope forms around each set of chromosomes and cytokinesis occurs, producing four daughter cells, each with a haploid set of chromosomes.
Explanation:
Answer:
A total of four daughter cells form.
Explanation:
Evaporative cooling is a product of evolution that has evolved in some organisms for use under certain environmental conditions. Circle the organisms or conditions below that you think are most likely to use evaporative cooling.
Answers
Answer:
In order to lower the temperature.
Explanation:
Mammals and birds uses evaporative cooling due to their high body temperature because this evaporative cooling removes the high temperature from the body. In this process, the water present in the body absorb all the extra heat and remove this extra heat from the body with change its state from liquid to vapors and the body's temperature cools down. This evaporative cooling is occurs in the process of sweating.
a medical reasearcher is testing a new experimental drug for a headache patients Group A consists of 100 participants who are given the new exprimental drug group B consists of 100 participants who are given a placebo or fake pill. Neither group knows which treatment they received Which is the control group?
Answers
Answer:
Group B... (the Placebo)
Explanation:
I say group B because the medical reasearchers are using group B to see the outcome and effects of the experimtal drug that they gave group A. So if in the end group A (given the experimental drug) has a better response to the headache after taking the pill then group B (given a fake drug) the medical reasearcher will know the effectiveness of the new drug.
Tessa conducted a demonstration about the movement of materials in and out of cells. She closed the door to her classroom, then sprayed a little perfume in the corner of the room. She drew this diagram to represent the room, with the dots representing the perfume molecules. Which statement best describes what Tessa should tell the class about the diagram? Diffusion has already occurred. Diffusion will occur. Active transport has already occurred. Active transport will occur.
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Answer:
Diffusion has already occurred.
Explanation:
Answer:
diffusion has already occured
Explanation:
i took the ed test
1) An example of International System of Measurement (SI) unit is: A) pound B) mile C) liter D) ounce
Answers
Answer:
pound
Explanation:
The sporophyte stage begins with the information of
Answers
Which nerve is responsible for weakness in climbing stairs or jumping?
A. Tibial
B. Superior gluteal
C. Inferior gluteal
D. Obturator
E. Femoral
Answers
Answer:
C. Inferior gluteal
Explanation:
The inferior gluteal nerve has a rich concentration in the gluteus maximus muscle. This muscle is located in the hip region. These nerves are primarily responsible for the ability of the gluteus maximus to move and performs some functions during motion.
An example of such function involves the extension of the hip to the thigh in movements such as climbing stairs, hiking, squatting etc.
A change in genotype, but not in phenotype, is most likely due to _________.
Answers
A change in genotype, but not in phenotype, is most likely due to neutral mutation.
A mutation consists of a spontaneous and unpredictable change in the sequence of genes that make up the DNA of a living being.
A neutral mutation is one that has no consequences on the phenotype, that is, it has no effect on the observable characteristics of an organism.Neutral mutations has effects on the genotype because it generates a change in the order of nucleotides that creates triplets that code for equivalent amino acids as basic amino acids.Therefore, we can conclude that a neutral mutation does not affect the viability of the living being.
Learn more about neutral mutations here: https://brainly.com/question/16257893
Which cranial bone can be seen laterally, inferiorly, superiorly when the skullcap is off, and through the orbits of the eye?
Answers
The sphenoid bone.
Though double check
Pine trees that are too tall or too short do not do as well as pine trees that are average in height. The short trees do not get as much sun and the tall trees break off in storms. How is this an example of stabilizing selection.
Answers
Answer:
The first Constitutional Amendments were proposed shortly after the Constitution itself. Larely focussed on protecting individual liberties
Explanation: isn't it.
In a fluorescence recovery after photobleaching (FRAP) experiment, a fluorescently tagged membrane protein, A, shows very little recovery of fluorescence ten minutes after photobleaching, while membrane protein B shows a rapid increase in fluorescence after bleaching, recovering nearly 80% of its original fluorescent signal by ten minutes. Based on this information, which of the following statements can be made?
A. Proteins A and B interact with each other in a complex
B. Protein A is easily denatured,
C. Protein Bis diffusing in a more fluid membrane.
D. Protein Ahas faster mobility in the membrane.
Answers
Answer:
The correct answer is option C. Protein Bis diffusing in a more fluid membrane.
Explanation:
Fluorescence recovery after photobleaching or FRAP is a technique used to examine the portability of fluorescent particles with the help of fluorescence microscopy that have been utilized since the mid-70s to evaluate the dispersion or movements of molecules in the cell membranes of the cell.
Fluorescence Recovery After Photobleaching (FRAP) is a strategy for deciding the energy of dispersion in living cells (typically) utilizing fluorescence microscopy.
In the given experiment:
The diffusion coefficient of GFP vary, based on the localization of the protein
Protein B is freely diffusing, due to which recovery is very high compared to protein A.
Protein which is less diffusing shows a slower and less rate of recovery.
How is Twain effective at using humor? Cite evidence of humorous moments in the text. Also consider Twain’s intent and viewpoint in your response.
Answers
Twain is effective at using his humor because he uses it to entertain his readers. It makes his readers laugh and provides social criticism mixed with humor. Twain shows the dark side of human nature in a funny way and expresses a serious viewpoint through silly characters.
Humor is the use of words, actions or signals which elicit laughter or smiles in a good natured way from people.
There are different scenarios where humor can be used effectively such as:
To bring relief to a tense atmosphere To make a room more livelyTo bring happiness to a person, etcWith all these in mind, Twain could have been effective at using humor because he knew just the right moment to be humorous and he was able to say the right things at the right time.
Please note that your question is incomplete, and as a result, i gave you a general overview to help you get the right answer.
Read more here:
https://brainly.com/question/14044151
According to evolutionary theory, behaviors that optimize survival and reproduction are favored by natural selection and therefore more likely to persist. How, then, can we explain the evolution of altruism, which is by definition costly to the self
Answers
Answer:
Altruism could be helpful for the survival of relatives
Explanation:
Altruism behavior is produced when an organism decreases its fitness in order to increase the chances of survival in other individuals in the population. It is believed that altruistic behavior could have evolved as an adaptation associated with the survival of relatives from the same family. In consequence, if this were the case, altruism could ultimately be considered as a selfish behavior because it aims at passing on of genes through the survival of relatives which could benefit with this behavior.
What are the most common causes of agriscience accidents?
Answers
Answer:
Overturning machinery.
Explanation:
Hope this helps <3
A two-year-old weighing 25.2 lb is admitted to the hospital with fever and diarrhea. Normally the child weighs 29.6 lb. How much fluid (in liters) needs to be replaced in the child's system?a. 1Lb. 1.75 Lc. 2 Ld. 4.4 L
Answers
Answer: C.) 2L
Explanation:
Given the question :
A two-year-old weighing 25.2 lb is admitted to the hospital with fever and diarrhea. Normally the child weighs 29.6 lb. How much fluid (in liters) needs to be replaced in the child's system?
Normal body weight if the baby = 29.6lb (pounds)
Weight of baby die to fever and diarrhea = 25.2lb(pounds)
Weight loss due to diarrhea and fever :
(29.6 - 25.2)lb = 4.4 lb
Amount of fluid needed to be replaced in litres = weight loss due to sickness
Then we need to convert 4.4lbs to Litre (L)
1 pound (lb) = 0.45359 liter (l)
4.4 lb = (4.4 * 0.45359) L
= 1.995796 L
= 2L
Examine the label information on the packages of a variety of breakfast cereals. Which types of cereals provide the best sources of carbohydrates, lipids, proteins, vitamins, and minerals? Which major nutrients are lacking in these cereals?
Answers
Answer:
B
Explanation:
B
Which statement is true? A.Simple sugars are made of polysaccharides. B.Amino acids are made of proteins. C.DNA molecules are made of nucleotides. D.Glycerol is made of fatty acids.
Answers
Answer:
C. DNA molecules are made of nucleotides.
Explanation:
DNA molcules are made up of building blocks called nucelotides.
These nucleotides are made of a sugar group, nitrogen base, and phosphate group.
These nucelotides bond together to form a strand of DNA.
Answer:
its c
Explanation:
Plants play a crucial role in the carbon cycle because they A do not release carbon dioxide during cellular respiration. B allow carbon to enter an ecosystem through photosynthesis. C have special bacteria that live in their root systems. D release water into the atmosphere through transpiration. Group of answer choices
Answers
B allow carbon to enter an ecosystem through photosynthesis.
D release water into the atmosphere through transpiration.
What are the three most common types of
bond?
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Answer:
The three most common types of bonds are: covalent, ionic, and hydrogen bonds. Hope this helps!
Explanation:
Answer:
U.S. Treasury ,municipal ,and corporate
How do you define professionalism
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Answer:
The conduct ,aims or qualities that characterize or mark a profession or a professional person is known as professionalism.
Explanation:
Hope it helps.
what are some adaptations that help animals who live in the alpine biome survive
Answers
Hii!! The correct answer is: They hibernate, migrate to warmer areas, insulate their bodies with fat and fur, and tend to have shorter legs, tails, and ears in order to reduce heat loss. (:
The following question's answers are:
Describe the weather conditions that characterize the chaparral biome.
hot and dry summers
mild winters
most rain comes in winter
D)
solid to liquid
Which example shows how a consumer gets energy from food?
A)
a worm eating a dead leaf
B)
a frog laying out in the sun
a rabbit matin
Answers
Answer:
A.
Explanation:
a worm eating a dead leaf, this shows the life process of feeding. Feeding is simply an organism obtainig energy from food. Give me brainliest if i helped!♡
Which of them is important in endurance race physical strength or emotional strength?
Answers
Answer:
Both
Explanation:
Endurance deals with how long you can do something that puts a physical strain on your body and not necessarily how much strain at once. That being said both physical strength and emotional strength play a big role in this. Physical strength is needed to be able to exert yourself and accomplish the initial task in the first place. While emotional strength is also needed in order to not give up and persevere as long as possible. Without will power (emotional strength) you will give up as soon as you are given the opportunity.