Answer:
c. By infecting living cells
Explanation:
c. By infecting living cells
Answer:
By infecting living cells
Explanation:
hope this helps
Which of the following would be selective against the tubercle bacillus? Group of answer choices streptogramin – inhibits protein synthesis vancomycin – inhibits peptidoglycan synthesis ethambutol – inhibits mycolic acid synthesis streptomycin – inhibits protein synthesis bacitracin – inhibits peptidoglycan synthesis
Answer:
C) ethambutol inhibits mycolic acid synthesis
Explanation:
Ethambutol is an antimycobacterial agent which is used in the treatment of tuberculosis. However, Ethambutol is to be given in combination with some other drug.
It inhibits the tubercle bacillus and synthesis of spermidine in mycobacteria by inhibiting the transfer of mycolic acids into the cell wall which further stimulates the synthesis of trehalose dimycolates This is bactericidal and may produce lethal effect if it penetrates into the human cell.
Option C is the right choice of answer
Ethambutol is the antibiotic that selectively targets and inhibits mycolic acid synthesis, making it effective against the tubercle bacillus.
Explanation:The tubercle bacillus, which causes tuberculosis, has a unique cell wall that includes a waxy substance called mycolic acid. This substance is essential for the survival of the bacteria, and its synthesis can be targeted by certain antibiotics for selective toxicity.
Of the antibiotics listed, ethambutol is the one that inhibits mycolic acid synthesis, making it selectively active against the tubercle bacillus. While other antibiotics listed, such as streptomycin and vancomycin, are effective against various bacteria by inhibiting protein synthesis or peptidoglycan synthesis, they do not offer the same targeted action against mycolic acid synthesis as ethambutol.
The layer of blood vessels innervated by sympathetic vasomotor fibers is called the
Answer:
Tunica Media I hope this helps
Explanation:
The endocrine gland called the ____________________ gland communicates with the hypothalamus to control many body activities. a. cortex c. pituitary b. pancreas d. hippocampus
Answer:
pituitary
Explanation:
The hypothalamus works with the pituitary gland, which makes and sends other important hormones around the body. Together, the hypothalamus and pituitary gland control many of the glands that produce hormones of the body, called the endocrine system.
Do you think humans exhibit traits of r- or K-selection? Explain your reasoning.
Answer:
Humans definitely show characteristics of K-selection. Humans have a longer life span than many organisms. They also have few offspring. On average, humans take 12 to 15 years to reach sexual maturity. Humans also care for their young until they’re mature enough to live on their own
Explanation:
Edmentum's sample answer
K and r selection are the part of the Darwinian fitness that depicts the lifespan and the number of offspring. Humans exhibit traits of K-selection as they have a longer lifespan.
What is r- or K-selection?r- or K-selection is the factor of the fitness and survival possessed by the organisms. r-selected species are small in size and are used generally for reproduction. Though the species is smaller in size with a short lifespan that produces a large number of offspring.
On the other hand, K-selected organisms are large and have a longer life span. K refers to the carrying capacity of the species. The organisms tend to give birth to fewer offsprings that undergo maturity and many phases that takes years.
Therefore, humans possess K selection.
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Jamie is reviewing a new diet plan that involves purchasing pre-packaged meals and taking a patented energy supplement. In an ad explaining how it works, Jamie reads about a study cited as evidence supporting the effectiveness of the plan. In the study, two groups were followed: one following the plan and another following a simple low-carbohydrate diet. What should Jamie look for in the study to have full confidence in its scientific reliability?
Answer:
Jamie should look at the difference in results in the two groups of people.
Explanation:
According to the question, two groups are being studied in which the one group is taking the food according to the new diet plan and the other group is taking a simple low-carbohydrate diet. So, for having full confidence in its scientific reliability, Jamie should look that the people taking pre-packaged meals as per the new diet plan are getting better results or not than the people who are taking low carbohydrate diet. If she gets a result in which it is found that new diet plan is giving a positive health benefit to the people then this new plan is scientifically reliable.
Answer:
C. Details on the number of studies conducted and the results of each trial!
Explanation:
i got it right on the test
Mid-ocean ridges, such as the mid-Atlantic ridge, normally form when tectonic plates are:
1) converging
2) diverging
3) stationary
4) sliding past each other
Answer:
2) diverging
Explanation:
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
Kevin decides to find out which fertilizer is best for tomatoes. He set up three plants, giving one no fertilizer, giving the second type A fertilizer, and giving the third type B fertilizer. He kept the first plant inside in a large pot, and the other two he planted in the yard. Is Kevin's experiment designed correctly? Group of answer choices No, it has too many variables or possible changes. It is impossible to say without knowing more information. Yes, it has controls and variables. No, we haven't seen the results yet
Answer:
No, it has too many variables or possible changes.
Explanation:
If you carried out an experiment or research on something, you have to given the same environmental and soil conditions to the factors. In this experiment, Kevin put the first plant in large pot and the other two plants in the field conditions. For performing correct experiments, Kevin put all the plants in separate pots or in the field conditions.
plz answer asap thank you stay safe!!!
One type of fiber that is not digested as it travels through the digestive system is __________________.
Answer:
Fermentable Fiber
Explanation:resistant to digestion and absorption
The sarcomere shortens when the myosin heads of the thick filaments
Answer:
The sacromere shorten when
When the myosin heads of the thick filaments in a cocked direction, form cross bridges with actin molecule in the thin filament.
Explanation:
Sacromere is the functional unit of straited muscle and muscle contractions. It initiate involuntary movement.
The sacromere shorten when
When the myosin heads of the thick filaments in a cocked direction, form cross bridges with actin molecule in the thin filament. It cause the sacromere in the muscle fibre to shorten and skeletal muscles to contract
Answer:
The correct answer is: form cross bridges with the actin molecules of the thin filaments.
Explanation:
The sarcomere makes up the unit of the striated muscle tissue, and is the structure responsible for the contractility of this tissue. Sarcomeres are composed of two types of filaments: thick filaments formed by myosin molecules, and thin filaments that are formed by actin molecules. In order to contraction to happen, the thin and the thick filaments move between one another in a coordinated manner to shorten the sarcomere and produce muscle contraction.
For muscle contraction to happen, myosin heads bind to the actin molecule by forming a cross-bridge with it -this happens when the actin-binding site that is commonly hidden by the proteins troponin and tropomyosin, is uncovered thanks to the arrival of calcium ions-. This binding allows the sliding mechanism that will end up shortening the sarcomere.
Farmers may use windmills for electricity and pumping water.
True
False
Answer:
THE ANSWER IS TRUE
Explanation:
: )
What do paleontologists use to define the boundaries between geologic time intervals?
Answer:
Explanation:
The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.
What are the main reasons forests are cut down?
Answer:
to make things
Explanation:
They use them to make papers, build houses, people use them to make fire, etc.
Answer:
agriculture
logging
urban development
Explanation:
i got right
Do turtles fly?...................................
Answer:
They fly in the water
Explanation:
Some compounds are not active carcinogens until they are converted into cancer-causing compounds in the body. To identify potential carcinogens using the Ames test, how should a compound be treated before being tested on bacteria?
Which activity is a function of blood?
Answer:
blood carries oxygen to difreent parts of the body
Explanation:this is why you have a heart so you can pump oygenated blood throughouut your body hope this helps god bless
Answer:
deliver oxygen and nutrients to and remove wastes from body cells.
Explanation:
During the warm temperatures of summer the arctic fox produces enzymes that cause it's for to become reddish brown. During the cold temperatures of winter, these enzymes do not work. As a result, the fox has a white coat that blends into the snow with the background
Answer:
The expression of certain genes is affected by temperature
Explanation:
During the warm temperatures of summer the arctic fox produces enzymes that cause it's for to become reddish brown. During the cold temperatures of winter, these enzymes do not work. As a result, the fox has a white coat that blends into the snow with the background
The expression of certain genes is affected by temperature explains this change in color found in them to match the surrounding snow, this is the reason why during the spring and summer, it has a dark coat which help match the brown dirt in it environment
Answer:
4. The expression of certain genes is affected my temperature
Explanation:
Lol I just did this question on my test
Choose the accurate statements about how communication by the nervous and endocrine systems differs. Check all that apply. Check All That Apply The nervous system releases neurotransmitters at synapses at specific target cells.The nervous system releases neurotransmitters at synapses at specific target cells. The nervous system adapts relatively slowly and may respond for days to weeks.The nervous system adapts relatively slowly and may respond for days to weeks. The endocrine system reacts more slowly to stimuli, often taking seconds to days.The endocrine system reacts more slowly to stimuli, often taking seconds to days. The endocrine system stops quickly when stimulus stops.
Answer:
The nervous system releases neurotransmitters at synapses at specific target cells & The endocrine system reacts more slowly to stimuli, often taking seconds to days.
Explanation:
The nervous system is very specific with where the neurotransmitters go so they will affect target cells. The endocrine system is slower than the nervous system because the hormones travel through the blood so it takes much longer to reach the designated area.
Neurotransmitters are released by the nervous system at synapses with certain target cells.
How nervous system works?The endocrine system responds to stimuli more slowly, frequently taking minutes to days.
The fact that the nervous system utilizes electrical impulses to convey signals through neurons while the endocrine system uses hormones to deliver instructions to the target cells through circulation is one of the most important distinctions between the two systems.
Neurons interact with one another throughout the nervous system through electrical and chemical signals.
Therefore nervous system utilizes electrical impulses to convey signals through neurotransmitters.
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What is the best definition of an allele?
Answer:
An allele is one of a pair of genes that appear in a particular location on a particular chromosome and control the same characteristic, such as blood type or color blindness.
Explanation:
Answer:
One of alternative forms of the same gene
What would be a likely outcome to the nitrogen cycle, if the population of nitrifying bacterial severely decreased?
An increase in the production of nitrites would occur
An increase in production of nitrates would be formed
An increase in the amount of ammonium present in the soil
An increase in the population size of denitrifying bacteria
If the population of nitrifying bacteria severely decreased, there would likely be an increase in the amount of ammonium present in the soil. Therefore, option (C) is correct.
What is nitrogen cycle?The nitrogen cycle is the process by which nitrogen is converted into different chemical forms as it circulates through ecosystems. Nitrifying bacteria change ammonium (NH4+) into nitrite (NO2-) and then into nitrate (NO3-), which plants can use to make DNA and amino acids, which are important biomolecules.
If there were less nitrifying bacteria, it would take longer for ammonium to turn into nitrite and nitrate. This would cause ammonium to build up in the soil. This could make plants and other living things sick, and if the extra ammonium gets into nearby bodies of water, it could change the way aquatic ecosystems work. Nitrifying bacteria would not cause more nitrites or nitrates to be made if they were killed off in large numbers, because these compounds are the end result of the nitrification process. Lastly, the number of denitrifying bacteria may grow, but this would not be a direct result of the number of nitrifying bacteria going down.
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why is stem cell research gaining importance?
Answer:
Why are stem cell research important? Stem cells represent an exciting area in medicine because of their potential to regenerate and repair damaged tissue. Some current therapies, such as bone marrow transplantation, already make use of stem cells and their potential for regeneration of damaged tissues.
Explanation:
What is not a function of the kidneys?
Answer:
The functions of the kidneys are:
Regulate water, inorganic ion, and acid-base balance.Remove metabolic waste products from the blood and excrete them in the urine.Remove foreign chemicals from the blood and excrete them in the urine.Perform gluconeogenesis.Secrete hormones.The kidneys filter blood, remove waste, maintain blood pressure, balance electrolytes, and stimulate red blood cell production but do not produce non-renal hormones like insulin.
The main functions of the kidneys are to filter the blood, remove wastes, and regulate vital substances in the body. The kidneys work to maintain blood pressure, balance electrolytes, and stimulate the production of red blood cells through the secretion of erythropoietin. However, what is not a function of the kidneys is the production of hormones that control non-renal functions such as insulin, which regulates glucose levels in the body.
Some diseases can impact the kidney's ability to perform these functions effectively, leading to the need for medical interventions like dialysis. Dialysis is a procedure that mimics the kidneys' filtering function when they are no longer capable of doing this sufficiently on their own.
A scientific explanation for how scientists use evidence to explain common ancestry and biological evolution
Answer:
Biologists use comparisons of form and function to classify life-forms into a hierarchy of groups.
Organisms group in the Eukarya domain are Plantae, Fungi, Animalia. The three kingdoms are distinguished by their modes of nutrition. Plants produce their own sugars and other food molecules by photosynthesis; fungi absorb dissolved nutrients; and animals obtain food by eating other organisms.
There is unity in diversity. Similarities between organisms are evident at all levels of hierarchy.
The main function of the male reproductive system is to produce and transport. True or False
Answer:
True
Explanation:
The purpose of the organs of the male reproductive system is to perform the following functions: To produce, maintain, and transport sperm (the male reproductive cells) and protective fluid (semen) To discharge sperm within the female reproductive tract during sex.---Quoted from WebMD
The outer most layer of the interior
Use what you have read to summarize Jackie Robinson’s story in two or three sentences.
Answer: Branch Rickey was searching for the right man to become the first African American player in Major League Baseball. Rickey explained the challenges to player Jackie Robinson. He would face racism and require a unique type of courage to succeed, but if he did succeed, he could make the box score the only thing that mattered.
Explanation: It's the sample response
Jackie Robinson was key in desegregating professional sports in the U.S., being the first African American to play in the National League. He also played an active role in the civil rights movement and contributed towards supporting African-American businesses.
Explanation:Jackie Robinson was an influential figure in the history of desegregation in the United States, particularly in professional sports. On April 15, 1947, Robinson started for the Brooklyn Dodgers, becoming the first African American to break the color barrier in the National League. Beyond his baseball career, he was an active participant in the civil rights movement, served on the board of directors for the NAACP, and assisted in the foundation of an African American-owned bank.
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The diploid number of a roundworm species is 4. Assuming there is no crossover, and random segregation of homologs during meiosis, how many different possible combinations of chromosomes might there be in the offspring?
There are 4 possible combinations of chromosomes in the offspring of a roundworm species with a diploid number of 4, assuming no crossover events occur.
To determine the number of possible combinations of chromosomes in the offspring, we need to consider the random segregation of homologous chromosomes during meiosis.
For a diploid organism with 'n' chromosome pairs, the number of possible combinations is given by 2n. In this case, the diploid number of roundworm is 4, which means there are 2 pairs of chromosomes (n = 2).Using the formula:[tex]2^2[/tex] = 4While hiking in the forest Karl walked past a y'all tree with cones hanging from branches it is the tallest tree in the forest to which phylum does this plant belong
Answer: Conifers
Explanation:I did the test
Answer:
D. Confiers
Explanation:
i did the test!
Describe ergogenic aids and the risks that are associated with using them.
Answer:Common ergogenic aids include anabolic steroids, which increase muscle mass. These illegal supplements are associated with a number of serious adverse effects, some irreversible. Creatine modestly improves athletic performance and appears to be relatively safe
Explanation:
The effect of ergogenic :Medical Definition of ergogenic
: increasing capacity for bodily or mental labor especially by eliminating fatigue symptoms an ergogenic drug.
Final answer:
Ergogenic aids are substances that improve energy production or recovery, but they carry serious health risks and ethical concerns. Anabolic steroids and hormones like erythropoietin and human growth hormone are banned by major athletic organizations due to the dangers they pose and the unfair advantage they provide. Their use can lead to irreversible side effects, including heart disease, infertility, and aggressive behavior.
Explanation:
Ergogenic aids are substances or devices that enhance energy production, use or recovery and provide athletes with a competitive advantage. Among the most recognized ergogenic aids are anabolic steroids, which are synthetic variations of the male sex hormone testosterone. While anabolic steroids can build muscle mass and improve athletic performance, their use is associated with severe and sometimes irreversible health risks.
Other common performance-enhancing hormones include erythropoietin, which boosts red blood cell production, and human growth hormone, which can aid in muscle building. The use of these substances raises significant ethical concerns as they offer an unfair advantage over competitors and are considered a form of cheating. Furthermore, ergogenic aids can cause serious, nonreversible side effects that can be fatal, such as increasing the risk of heart attacks, infertility, and aggressive behavior, commonly referred to as "roid-rage".
All major athletic organizations, including the International Olympic Committee, National Collegiate Athletic Association, Major League Baseball, and National Football League, have banned the use of performance-enhancing drugs due to the health risks and the unfair competitive advantage they provide.
Which of the following releases energy? (4 points)
A)Nutrients entering a cell through the cell membrane
B)Removing a phosphate group from an ATP molecule
C)Building sugar or starch molecules for long-term energy storage
D)Adding an additional phosphate group to an ADP molecule
Answer:
B
Explanation:
Answer:
Which of the following releases energy?
Removing a phosphate group from an ATP molecule
Explanation:
Catabolism describes this as it involves breaking down of molecules and energy is being released
The appearance of fireflies at dusk is an example of a circadian rhythm because it
Answer:
happens daily
Explanation:
Answer:
Explanation:
1.- C: Happens Dailey
2.- A: seasonal movement
3.-D: offer greater protection....
4.-C: ensure that the meaning....
5.-D: visual signing
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