Answer:
Explanation:
Scenario 2: R is codominant with r.
Scenario 3: R and S are completely dominant to rand s, respectively; R and S are linked by 15 m.u. and do not interact with each other.
Scenario 4: Genes R and S perform the same function; R and S are completely dominant to r and s, respectively; and R and S are unlinked.
Scenario 5: R and S are completely dominant to r and s, respectively; R and S are linked by 10 m.u. and show dominant epistasis.
The antibiotics tetracycline and erythromycin inhibit bacterial protein synthesis, but have no effect on proteins encoded by eukaryotic, nuclear genes. Conversely, the antibiotic cycloheximide inhibits protein synthesis of nuclear genes, but has no effect on protein synthesis in bacteria.
Select the statement that best describes the effect of a particular antibiotic on protein synthesis.
a. It cannot be determined because two of these antibiotics affect bacteria, and cells with mitochondria are eukaryotic.
b. Tetracycline treatment would inhibit mitochondrial protein synthesis, but not protein synthesis of nuclear genes.
c. Erythromycin treatment would inhibit protein synthesis from nuclear genes, but not from mitochondrial genes.
d. Cycloheximide treatment would inhibit expression of mitochondrial genes, but not expression of nuclear genes.
e. Tetracycline treatment would inhibit translation of nuclear genes, but not translation of mitochondrial genes.
Answer:
I think it might be A
Clarissa complained of shortness of breath and currently has a pacemaker. A myocardial perfusion imaging, tomographic (SPECT), multiple studies, was done. What is the appropriate CPT code for this procedure?
a. 78452
b. 78451
c. 78453
d. 78456
Answer:
a. 78452
Explanation:
Myocardial perfusion imaging is use to assess myocardial viability or to determine the extent of myocardial ischemia. SPECT systems is widely using now a days as imaging can be done in less than 10 minutes.
The appropriate CPT code for the procedure that Clarissa is undergoing is 78452. 78452 include multiple studies at stress or rest condition by providing injection of radionuclide in resting phase before taking resting images. This code also determine radioactivity distribution counts arising from certain areas such as anterior wall counts may be reduced.
Hence, the correct option is a. 78452
A new multicellular organism has been discovered, and scientists want to study the organism’s cell structures, including organelles. Which microscope should they use?
Which reactant in the photosynthesis equation is used directly to make
sugar?
O A. Water
O B. Chlorophyll
O C. Light energy
O D. Carbon dioxide
Answer: the answer is carbon dioxide
Explanation:
Should certain vaccines be required?
Explain your answer to the question above.
Answer:
Yes
Explanation:
Vaccines, are dangerous but also very helpful. Most vaccines we have now help prevent the original disease they are designed with. Such as Polio.
Help this Helps!
Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time
OPTIONS:
A) biogeographic isolation affects the random changes that take place within gene pools
B) biogeographic isolation affects the changes in gene pools that result from which organisms are breeding
C) biogeographic isolation determines who will win competition for mates
D) biogeographic isolation determines the time that populations will breed
Answer:
A) biogeographic isolation affects the random changes that take place within gene pools
Explanation:
Organisms can become splitted and isolated from each other by biogeographical factors, thereby preventing the isolated population of species from interbreeding with each other. When this occurs, the isolated population, over time, evolve separately and later become distinct from each other leading to a change in the original gene pool.
Biogeographical factors uch as habitat isolation can cause a change in the original gene of a species population which have now become isolated geographically, and thus, evolve separately.
What causes an ecosystem to move from a primary successional stage towards a relatively-stable mature ecosystem?
Answer:
The correct answer is "secondary succession, an ecological succession step where an area previously occupied by living beings is disrupted".
Explanation:
In ecological succession, an ecosystem changes and develops through a series of steps. The first step, is the primary successional stage where rocks or other sedimentary structures are colonized by microorganisms. The second step, where the ecosystems changes towards a relatively-stable mature stage, occurs when an area previously occupied by living beings is disrupted. This step is named secondary succession, and the most clear example of this phenomena occurs when wildfire clears oak and hickory forests.
A cohort of 3000 individuals was chosen to be part of a study on the potential relationship between being infected with hepatitis C virus (HCV) and liver disease. 800 of the cohort members acquire an HCV infection and out of those infected persons 640 develop liver disease. 200 of the remaining cohort members also develop liver disease.
A. What is the relative risk of developing liver disease based on exposure to HCV?
B. What is the odds ratio for developing liver disease based on exposure to HCV?
Answer:
Relative risk = percentage of disease after exposition/percentage of disease without exposition
= (800/3000) / (200/3000)
= 26,66 % / 6,66 % = 400 %
Odds ratio = odds of disease after exposition/odds of disease without exposition
= (800/3000) / (200/3000)
= 0.2666 / 0.0666 = 4
Explanation:
The relative risk estimates the probable outcome in the exposed group in regard to the expected outcome in the non-exposed group. A relative risk of 400 % is indicative of 4 times the average risk. On the other hand, the odds ratio estimates the association between the exposure and the outcome for a particular disease.
Both the relative risk and the odds ratio are estimated in a very similar mode, however, the first is calculated as percentages.
Complete the following sentences about heme by moving the terms to the correct targets Some terms will not be used.
1. The prosthetic group of hemoglobin and myoglobin is_______.
2. The organic ring component of heme is_______
3. Under normal conditions, the central atom of heme is________.
4. In________the central iron atom is displaced 0.4 A out of the plane of the porphyrin ring system.
5. The central iron atom has_______bonds:________to nitrogen atoms in the porphyrin, one to a_______residue and one to oxygen.
A. Oxyhemoglobin
B. Six
C. Four
D. Three
E. Histidine
F. Heme
G. Serine
H. Fe2+
I. Deoxyhemoglobin
J. Cysteine
K. Fe3+
L. Porphyrin
Answer:
1. The prosthetic group of hemoglobin and myoglobin is heme.
2.The organic ring component of heme is porphyrin ring.
3. Under normal conditions, the central atom of heme is Iron (Fe2+).
4. In deoxyhaemoglobin the central iron atom is displaced 0.4 A out of the plane of the porphyrin ring system.
5.The central iron atom has six bonds: four to nitrogen atoms in the porphyrin, one to a histidine residue and one to oxygen.
Explanation:
1. The heme is the prosthetic group common to both the hemoglobin and myoglobin. It is made up of a central iron ring.
2. The porphyrin ring is the organic component of the heme that surrounds the iron ring. Its based on a tetrapyrole ring called porphin commonly found in other biomolecules such as cytochrome and chlorophyll in plants
3. Iron (Fe2+) is central to the heme structure. It has the ability to bind to an oxygen molecule at a time. This gives the protein- hemoglobin the ability to bind to 4 oxygen molecules at a time.
4. Deoxyhaemoglobin is simply a reduced form of hemoglobin which has lost oxygen molecule in red blood cells. It is purple blue in colour.
5. In the middle of the porphyrin ring, the iron binds to 4 nitrogen atoms. 2 free binding sites are available on either side of the plane heme structure with histidine surounding the heme molecule.
A reseacher was studying mutations in bacteria.he found that certain bacteria had changes in their dna that allowed them to be resistant to antibotics.this research is an example of. The mutation will lead to
Answer: 1.B). Evolution genetics.
2.C). Less Bacteria becoming resistant to the specific Antibiotics .
Explanation:
Evolution genetics is field of science, which includes study of genetic variations that lead to evolutionary changes in organisms. As some bacteria had changed their DNA that led to development of antibiotic resistance in them.
Due to antibiotic resistance, certain bacteria, in which changes in DNA take place, become resistant against some type of antibiotics and those antibiotics are no longer effective to prevent or kill them
Thus, the correct options to be filled in the blanks are option (B) and option (C).
Look at the structure in the picture below What function does the structure have?
Answer:
The structure in the picture shows arms of an octopus.
An octopus has six or eight arms and perform several functions such as:
Octopus arms are helpful for walking in the ocean or water surface.Each arm has suc.kers that help to trap prey and defending them from attackers.Suc.kers on each ars help it to taste the food and even crack the hard shells of creatures in water.
Answer:
to move around
Explanation:
What must occur in order for a matter to change states? A: Heat must be added or removed B: A chemical change must occur C: Other substances must be added D: The temperature must change
Answer:a chemical change must occur to change states
Explanation:
Chemical changes are irreversible, physical changes however dont affect the structure of the molecule of whatever it is
Answer:
Hey!
Your answer is A: Heat must be added or removed
Explanation:
For example...
To change water from a liquid to a solid, you have to change its molecular composition and change the bondages between the Hydrogen and Oxygen molecules...
This is only done when you add heat / remove through Vaporization / Condensation!
To change a substance's state is a REVERSIBLE process meaning you have to add or remove energy (heat) to change its state!
The graph below compares the rates of reaction of a burning candle and an exploding firework.
Comparing Chemical Reactions
A graph has time on the horizontal axis and concentration of reactants on the vertical axis. For an exploding firework, the concentration starts high, increases slightly and then decreases rapidly. For a burning candle the concentration starts high, increases more than the firework, and then decreases rapidly. The concentration for the burning candle is higher than the firework at all timepoints.
What can you conclude from the graph?
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
The reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
The reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
The reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
Answer:
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
Explanation:
The speed of a chemical reaction and the amount of energy required for this reaction is directly linked to the concentration of reagents present in the system. With that, we can say that the higher the concentration of reagents, the faster the chemical reaction will be due to the greater probability of collision between its molecules.
Although the reaction that causes a candle to burn has more reactants than the reaction that causes the fireworks to explode, the latter requires less energy to start. This makes the molecules of the reagents stir faster and collide more efficiently, making the reaction happen much faster.
In summary, the reaction that causes a firework to explode requires less energy to start and occurs more quickly than the reaction that causes a candle to burn.
The reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
The rate of reaction refers to the ease with which reactants are converted to products. The higher the rate of reaction, the faster reactants are converted into products.
The activation energy is the energy required for reactants to be converted into products. It is an energy barrier that separates reactants and products.
From the description of the graphs, we are told that the reaction that causes the explosion of firework starts at high concentration, initially increases slightly then decreases rapidly. The fact that it initially increased slightly before decreasing rapidly implies that the high energy required for the reaction to start is high.
On the other hand, the reaction for the candle to burn starts at high concentration, increases more than the firework, and then decreases rapidly because the reaction requires a lesser energy to commence than the reaction for the burning of candle.
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True r false- Hurricane storm categories increase as wind increases and pressure decreases.
Answer: False
Explanation: I think it's false because, hurricane damages are caused by storm surges, strong winds and associated tornadoes.
Explain phloem structure and function, using the following terms: sieve elements, sieve cells, companion cells, girdling, translocation, sieve areas, P-proteins, non-reducing sugars.
Answer:
Explanation:
Phloem cells are conducting vessels that are found in vascular plant. They are used in the transport of photosynthate produce during photosynthesis from the source of production to other parts of the body.
It consist of sieve elements, which are the conducting vessel that aids transport of sugar round the body. They are very active before maturity at mature they are no longer in use.
Companion cells are used in replacement of sieve element at maturity, they function in metabolism together with the sieve tube Translocation is the transport or movement of sugar round the body.
Girdlings is the removal of the bark of a plant this can inhibit active transport of food.
Non-reducing sugar are monosacharrides such as glucose that are produce and transported round the body of the plant.
P-protein are found in the plants sap usually in large amount in the sieve elements.
The goal of applied behavior analysis is to __________.
Answer:
To establish and enhance socially important behaviors.
Explanation:
This is a form of therapy that helps individuals improve on certain important behaviors which affects our daily life. We are likely to socialize and it’s imperative to have the necessarily social skills or behavior.These behaviors include punctuality,social, communication and learning skills etc.
The main aim of applied behavior analysis is to establish and enhance socially important behaviors.
Write in the space provided the type of non-Mendelian inheritance from the list above that matches the descriptions or the examples listed below.
1. ________when a gene has more than two allele variants.
2. ________Whena singlegene orallele controls the expression of 2 or more traits.
3. _______when offspring show a blended phenotype, a physical appearance intermediate to the phenotype of both parents.
4. _______when an allele is carried in the X chromosome.
5. _______when two dominant alleles are equally expressed in the phenotype.
6. _______when a snapdragon plant with red flowers is crossed with a snapdragon plant with white flowers and all their offspring produce pink flowers.
7. _______when the offspring of a red bull and a white cow producer oan offspring, a coat pattern that shows an equal mixture ofred hairs and white hairs.
8. _______when one gene controls the expression of a gene at a different locus.
9. _______in humans, wetear wax and strong body odor are two characteristics controlled by one allele.
10 ______red-green color blindness is a deficiency that appears more frequently in men. Boys inherit thered-green color deficiency allele from their mothers.
Answer:
Explanation below.
Explanation:
1. Multiple gene alleles.
2. Dominant gene
3. Heterozygous
4. Female trait
5. Homozygous
6. Evolution/ new breed
7. Mixed breed
8. Dominant gene
9. Hereditary
10. Rare gene
Which of the following is made of microcrystalline quartz? Group of answer choices A.dolostone B.gypsum C.chert D.coquina
What cell type are involved in the secretion thyroglobulin ?
By thyroid epithelial cells and secreted into the lumen of the follicle - colloid is essentially a pool of thyroglobulin.
What is Thyroglobulin?The amount of thyroglobulin in a sample of your blood is measured by a thyroglobulin test. Your thyroid produces a protein called thyroglobulin. A little gland in your neck with a butterfly form is your thyroid.
It produces hormones that regulate a variety of bodily functions, such as your heart rate and how quickly you burn off calories from food.
One kind of test for tumor markers is the thyroglobulin test. In reaction to cancer in your body, cancer cells and/or normal cells produce molecules known as tumor markers. Small levels of thyroglobulin are typically released into your bloodstream by your thyroid.
Therefore, By thyroid epithelial cells and secreted into the lumen of the follicle - colloid is essentially a pool of thyroglobulin.
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I will mark as BRANLIEST!
I will give 55 points to answers this correctly!
The tometti fossils are most related to?.......
Answer:
the tometti fossil are most related to ostriches or to crocodiles.
How is global climate change is impacting our ecosystems ( in your own words not from google )
Answer:
Climate change impacts where species live and how they interact, also including the timing of biological events. Climate change can immense the capacity of ecosystems to extreme events and disturbance, such as wildfires, floods, and droughts.
Explanation:
Suppose a certain drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that the drug will be harmful to human cells because it will inhibit.
A. The formation of alcohol C. Glycolysis
B. Oxidative phosphorylation D. Kreb’s cycle
Answer:
The options to this question is incomplete, the correct options are:
A) the citric acid cycle.
B) oxidative phosphorylation.
C) glycolysis.
D) the citric acid cycle and oxidative phosphorylation
The answer is D
Explanation:
Cellular respiration is an important metabolic process carried out by the cells of living organisms including human cells. Aerobic cellular respiration involves three main stages viz: Glycolysis, Kreb's cycle, and Oxidative phosphorylation. These three processes occur to bring about the breakdown of glucose to synthesize ATP.
Glycolysis occurs in the cytoplasm while Kreb's cycle and Oxidative phosphorylation both occurs in the matrix and intracellular membrane of the Mitochondrion respectively. Hence, a drug that causes holes in both mitochondrial membranes will affect both Kreb's cycle and Oxidative phosphorylation.
3. What is the name of the process by which evolution occurs?
Answer:
Evolution is the process of genetic change from one generation to the next and may be caused by several methods. In essence, evolution occurs when some individuals or some alleles (gene types) reproduce themselves more than others,increasing their prevalence in subsequent generations.
Explanation:
Congenital hyperinsulinism is a rare condition in which infants experience frequent episodes of hypoglycemia. Based on the functions of the two main hormones that control blood sugar homeostasis, which of the following would be effective at treating the hyperinsulinemia?
A. Glucagon
B. Glucocorticoids
C. Preventing insulin release or production
D. All of the choices are correct.
Answer:
Any treatment which involves reduction in the levels of insulin to curb excessive influx of glucose into the cells from the blood will be an ideal treatments.
Glucagon, which converts excess glucose to glycogen. Glucocorticoids induces insulin resistance thus raises glucose levels.
suppressing insulin release will be another option.
Therefore all options are correct.
Explanation:
The
called the pleura.
are enclosed in a membrane
The
are branch-like extensions
found in the lower respiratory system.
Identify the structures labeled in the diagram to
the right
Label A
A
In the 1930s, medical journal
articles linked asbestos to cancer.
Answer:
Lungs
bronchioles
alveoli
positive impact
Explanation:
Answer:
The -lungs- are enclosed in a membrane called the pleura.
The -bronchioles- are branch-like extensions found in the lower respiratory system.
-alveoli- Label A
-positive impact- In the 1930s, medical journal articles linked asbestos to cancer.
Explanation:
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Which of the following is true? Group of answer choices In the brain, neurons are more abundant than neuroglia. An action potential never occurs in dendrites. When a neuron is stimulated, Na+ gates open and allow Na+ to exit the cell. In a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels. Norepinephrine is a neuropeptide.
Answer:
The true statements are:
An action potential never occurs in dendrites.
Norepinephrine is a monoamine.
Explanation:
In the following question only two statements are true that are; an action potential never occurs in dendrites as it occurs in nerves to send signals from cell body and axon and transmit it.
The second correct statement is Norepinephrine is a monoamine as these are particular neurotransmitters dopamine, serotonin, also known as catecholamines sometimes.
Thus, the correct answer is :
An action potential never occurs in dendrites.
Norepinephrine is a monoamine.
Vhat do scientists need to look at before developing an argument?
The validity of data, claims, hypotheses, and observations.
Their opinion and personal views.
The arguments of famous people on the topic.
The arguments that make the most sense for society.
Answer:
The validity of data, claims, hypotheses, and observations.
Explanation:
Making an argument and discussion over the scientific arguments are considered important to the scientific method.
The argument should be made in a way that it should check the validity of the hypothesis. The scientist who has to make an argument should consider various steps of scientific method like hypothesis which should predict the explanation of the natural phenomenon.
The person should consider the validity of the data whether it supports the hypothesis or not and observation of the experiment.
Thus, the selected option is the correct answer.
Answer:
A
Explanation:
The validity of data, claims, hypotheses, and observations.
edge 2020
In the parental generation, inbred black and an albino mice parents mate. The resulting F1 mice are black and heterozygous at 2 different loci. The F2 population consists of black, white, and albino mice. Albino is epistatic to pigmented. What is the phenotypic segregation ratio of this mouse species in the F2 generation? Enter your answer in the format: "4:3:2". Note lack of color pigmentation is recessive.
Answer:
12:4:3
Explanation:
Let the lack of color pigmentation which is recessive be aa where AA and Aa allow for color (BB, Bb - black, baby - white).
The F1 parents are BbAa x BbAa
This cross will produce 12/16 blacks, 4/16 albinos and 3/16 white.
Which of the following are true?
1. Random Fertilization means that any one sperm may fertilize any one egg as a chance event.
II. Random fertilization allows for a lot of diversity in offspring.
III. Crossing over and independent assortment do NOT affect the diversity of offspring produced
by random fertilization.
Select one:
o
a. I and III
b. II and III
c. I, II, and III
d. I and II
Answer:
1 and 2
Explanation: Random Fertilization means that any one sperm may fertilize any one egg as a chance event.
Random fertilization allows for a lot of diversity in offspring.
Random Fertilization means that any one sperm may fertilize any one egg as a chance event and allows for a lot of diversity in offspring. So, the correct option is (D).
What is Random Fertilization?Random fertilization refers to random mating. In this, during sexual reproduction, male gametes and female gametes which fuse to produce offspring are randomly selected from the pool of male and female gametes.
Random fertilization increases genetic diversity. When a male gamete and a female gamete finally meet which results in a large number of genetic possibilities built up during independent assortment and crossing over.
The example of Random Fertilization is when the two individuals mate, where each is capable of producing more than 8 million potential gametes, then the random probability of any one sperm and egg coming together showing 70 trillion different combinations.
Thus, Random Fertilization means that any one sperm may fertilize any one egg as a chance event and allows for a lot of diversity in offspring. So, the correct option is (D).
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1. The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of uracil in RNA.
True or False?
2. The correct steps of the scientific methods are: experiment, conclusion, exploration, application
True or False
Answer:
1,True
Explanation:
2, exploration -experiment-application -conclusion
1) False because thymine is absent in RNA.
2)False, correct order is exploration, experiment, application, and conclusion. Hence both statements are false.
What is RNA?RNA (ribonucleic acid)is a nucleic acid, present in almost all organisms. It is single-stranded. In some organisms, it acts as genetic material. It constitutes of a ribose sugar, phosphate group, and nitrogen base and that are adenine, uracil, guanine, and cytosine. Uracil is present in RNA in place of thymine.
There are three types of RNA that are mRNA, tRNA, and rRNA. It does not obey Chargaff's rule. It has an important role in protein synthesis by ribosomes through the translation process.
The correct order of scientific method is exploration, experiment, application, and conclusion. Hence both statements are false.
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