Answer:
All of these choices are correct.
Explanation:
Histone modification can be defined as a type of gene expression regulation. It refers to covalent post-translational modifications of histon tail proteins such as methylation, phosphorylation, acetylation, ubiquitylation, and sumoylation. As a consequence of modifications, chromatin structure might be changed, into active regions of euchromatin, (active transcription), or heterochromatin regions (inactive transcription).
Modification might be due to response to the environment, are heritable and are called epigenetic control.
I will mark brainliest! Complete the possible outcomes for each generation in the pedigree chart.
Fillers:
aa AA Aa
Answer:
The correct sequence of fillers left to right are AA. Aa, and aa.
Explanation:
In the given pedigree chart, parents are heterozygous Aa and homozygous AA produce gametes A and a, and A and A respectively. All gametes will assort and possible outcomes will be AA, AA, Aa, and Aa in first generation.
Cross between Aa and Aa will produce gametes A, A, and A, a. All these gametes assorted and produce offspring and outcomes are AA, aa, Aa, and Aa in second generation.
Thus, The correct sequence of fillers left to right are AA. Aa, and aa.
Answer:
The correct sequence of fillers left to right are AA. Aa, and aa.
Explanation:
What percentage of water on earth is freshwater?
2.5%
It is a very small percentage.
Which of the following is a technique developed to safeguard against even unintentional bias in recording data?
Physical Science
Answer: Fail to Plan, Plan to Fail
Explanation:
How do the body’s exterior lines of defense prevent illness? (7th grade Science)
A) They prevent pathogens from entering the body.
B) They make antibodies to protect against new pathogens.
C) They warn the body that pathogens have entered the body.
D) They cause fevers so that the body is too hot for pathogens to survive.
Answer:
A
Explanation:
they prevent pathogens from entering the body because the human skin is made of a tough layer and is difficult to be penetrated by organisms. Even the mucous membrane (lines the digestive tract and respiratory tract) prevent pathogens from entering the body.
The polypeptide encoded by the glucose carrier gene has a signal sequence. As a result, the ribosome and the polypeptide that is beginning to be made will be transported to the _________ (a cellular compartment) where translation will continue. Then the newly made glucose carrier protein will travel through ______________ (another cellular compartment), and then finally be sent to the plasma membrane. Once there, it will allow glucose to enter the cell through _________________ (simple diffusion, facilitated diffusion or active transport).
Answer:
The correct words for the three blanks are as follows:
1. Endoplasmic reticulum. 2. Golgi apparatus. 3. Facilitated diffusion.
Explanation:
During the translation stage of protein synthesis, signal sequences are either attached or excluded from a synthesized protein in order to indicate the right location it should be sent to. Proteins that possess signal sequences are usually sent to the endoplasmic reticulum, where they will be folded into their right shapes. From the endoplasmic reticulum the proteins are then transported into Golgi apparatus via membrane vesicles. In the Golgi apparatus, proteins undergo their final modifications before they are transported to their final destinations. The final destination of glucose carrier proteins is the plasma membrane, where they help glucose molecules to enter the cell via facilitated diffusion.
Which statement about reproduction is true? A. Angiosperms reproduce using seeds, but gymnosperms do not. B. Gymnosperms reproduce using seeds, but angiosperms do not. C. Both angiosperms and gymnosperms reproduce using seeds. D. Neither angiosperms nor gymnosperms reproduce using seeds.
Answer:
c
Explanation:
A is correct because Gynosperms using female and male cones and Angiosperms use seeds.....Brainliest?
Proteins are digested in which areas of the body?
The stomach is where protein is digested.
What are two possible ways that making plastics for electronic devices could impact the environment
Answer:
RoHS applies to the following substances for electronic equipment and electrical appliances: lead, mercury, cadmium, hexavalent chromium, PBB (polybrominated biphenyls), and some PBDEs (polybrominated diphenyl ethers).
Answer:
Plastic has a significant environmental effect since it takes a long time for it to degrade. Furthermore, as plastic components decompose in the sun, harmful chemicals are released into the soil, and when plastic parts are burned, hazardous substances are discharged into the air, producing ambient air pollution.
How many amur leopards are left in the world 2019
Answer:
About 70
Explanation:
Amur leopard is a rare subspecies located at Russian Far East. They are solitary, nocturnal animals that are highly territorial. The number of individuals in the is very low, because Amur leopards are on the brink of extinction. This is because their main threat are humans-hunters who kill them for the fur, but also development of the cities and farm on leopards' habitat. Since their population is small, interbreeding is a huge problem.
As of 2019, there were about 100 Amur leopards left in the world. These critically endangered big cats are primarily found in the Russian Far East and Northeast China, and their survival depends heavily on ongoing conservation efforts.
Explanation:As of 2019, there were approximately 100 Amur leopards left in the world. The Amur leopard is a critically endangered species, and concerted conservation efforts are vital for their survival. The population estimates for these elusive big cats are based on camera trap studies and other types of research that monitor their presence in the wild.
The Amur leopard, also known as the Far Eastern leopard, inhabits the Russian Far East and Northeast China, and its small population size has placed it at extreme risk of extinction due to poaching, habitat loss, and inbreeding. Conservation programs, including anti-poaching measures and habitat preservation, are crucial to increase their numbers and ensure their future.
On the Bahamian island of Andros, mosquitofish populations live in various, now-isolated, freshwater ponds that were once united. Currently, some predator-rich ponds have mosquitofish that can swim in short, fast bursts; other predator-poor ponds have mosquitofish that can swim continuously for a long time. When placed together in the same body of water, the two kinds of female mosquitofish exhibit exclusive breeding preferences. Which two of the following have operated to increase divergence between mosquitofish populations on Andros? improved gene flow bottleneck effect sexual selection founder effect natural selection
The increased divergence between mosquitofish populations on Andros is due to the bottleneck effect and natural selection.
Explanation:The two factors that have operated to increase divergence between mosquitofish populations on Andros are the bottleneck effect and natural selection. The bottleneck effect occurs when a population is drastically reduced, resulting in a loss of genetic variation. In this case, the isolation of the ponds from each other created smaller populations that were exposed to different selective pressures, leading to divergence. Natural selection then acts on these smaller populations, favoring traits that are advantageous in their specific pond environment.
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When we saw plant cells placed in high concentrations of salt, what did you observe about the responses of the cell wall and the cell membrane? How were they similar and how were they different? Be specific. What might that tell you about the structure of the cell wall versus the cell membrane? Explain. Not all molecules that a cell needs are going to be able to enter a cell by diffusion through the cell membrane. Give two examples of molecules that a cell might need and explain why they can’t enter by diffusion.
Explanation:
1.cell membrane far apart from the cell wall thats why the plant cells shrinked
3.cell walls are made of cellulose while cell membrane made of phospholipid.
4.water and nutrien cant enter by diffusion because the molecule is too big.
I HOPE THIS HELPS TELL ME IF IM WRONG ^^
The most efficient control of eukaryotic gene expression is achieved at the level ofA) replication.B) transcription initiation.C) post-transcription.D) translation initiation.E) post-translation.
B) transcription initiation
All else being equal, selection should more strongly favor reinforcement of reproductive isolation among related species in:peripatric populations over sympatric populations.peripatric populations over allopatric populations.allopatric populations over peripatric populations.allopatric populations over sympatric populations.sympatric populations over allopatric populations.
Answer:
sympatric populations over allopatric populations.
Explanation:
Allopatric speciation is a form of speciation (creation of new species) that occurs as a result of geographic isolation. This means that a part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations reach a high level of genetic divergence. They can no longer interbreed which means they become two different species (speciation).
New populations evolve as result of mutation, genetic drift and natural selection.
Sympatric speciation is a form of speciation without geographic isolation, usually due to the reproductive isolation or changes in the chromosomes of the organism.
In the experimental process, the scientists made all measurements for material A before beginning to take measurements for material B. Was this a valid approach?
A.) No; in order to compare materials, they must be analyzed at the same time.
B.) Yes; materials can be tested in any order as long as all measurements are recorded carefully.
C.) Yes; testing material B before testing material A, however, would have invalidated the results.
D.) No; the results of the first test could have influenced the results of the second test.
Yes; testing material B before testing material A, however, would have invalidated the results.
hope this helps :)
Which process converts carbon in a sugar
molecule back into the air while providing
an organism energy for growth and
development? WILL VOTE BRAINLIEST.
A. Cellular Respiration
B. Carbon Dioxide
C. Photosynthesis
D. Glucose
17. Which of the following examples of an ecological effect leading to an evolutionary effect is most correct? A) When seeds are not plentiful, trees produce more seeds. B) A few organisms of a larger population survive a drought, and then these survivors emigrate to less arid environments. C) A few individuals with denser fur survive the coldest days of an ice age, and the reproducing survivors of the ice age all have dense fur. D) Fish that swim the fastest in running water catch the most prey and more easily escape predation. E) The insects that spend the most time exposed to sunlight have the most mutations.
Answer:
The correct option is C.
Explanation:
Evolution refers to the gradual development of living organisms from earlier forms to the forms that exist today. One of the principal factors that lead to evolution is the ability of an organism to adapt to adverse changes in its environment. Organisms that are able to survive adverse changes in their environments usually go on to produce offspring that possess their parents' ability to survive. A good example of this is given in option C, where individuals with denser fur were able to survive from severe cold and then give birth to young ones that inherit their parents' ability to survive severe cold.
Final answer:
An ecological effect leading to an evolutionary effect is most correctly exemplified by a few individuals with dense fur surviving an ice age and passing this trait to future generations, illustrating natural selection.
Explanation:
The example that most correctly illustrates an ecological effect leading to an evolutionary effect is C) A few individuals with denser fur survive the coldest days of an ice age, and the reproducing survivors of the ice age all have dense fur. This situation exemplifies the concept of natural selection, where specific traits that enhance survival in a given environment become more prevalent in the population over time. In this case, the dense fur is an advantageous trait during the ice age, allowing individuals with this trait to survive, reproduce, and pass the trait to future generations.
Natural selection is driven by factors such as variation of traits among individuals, competition for limited resources, and the fact that more offspring are produced than can survive. When an environmental challenge, like an ice age, presents itself, not all individuals have traits well-suited to survive under the new conditions. Those with beneficial traits, such as denser fur, have a higher chance of survival and reproduction, leading to evolutionary changes in the population.
1.) When the Greenhouse Effect is exaggerated through human activities more and more heat will be trapped on the Earth, increasing the average temperature. What is this called?
A.) Global cooling
B.) Global Warming
C.) Photosynthesis
D.) CO2 Emissions
2.) What is the largest source of U.S. greenhouse gas emissions?
A.) Agriculture
B.) Transportation
C.) Electricity production
D.) Home heating
3.) What is an example of the greenhouse effect?
A.) Steam rising from boiling water
B.) Baking brownies on a metal pan.
C.) Stepping on hot pavement and it burning your feet.
D.) Inside of a car becoming hot on a warm day.
4.) What are the two most major gases produced by people?
A.) Methane and Fluorine
B.) Carbon Dioxide and Methane
C.) Carbon Dioxide and Nitrous Oxide
D.) Methane and Nitrous Oxide
1 - B
2 - Also B
3 - D
4 - B again
Anything else i can help with Dean?
1. Global warming
2. Transportation
3. Inside of a car becoming hot on a warm day.
4.Carbon Dioxide and Methane
What is greenhouse effect?The greenhouse effect is a natural mechanism that causes the surface of the Earth to warm. Some of the Sun's energy is reflected back to space, while the rest is absorbed and re-radiated by greenhouse gases as it enters the Earth's atmosphere.Emissions of carbon dioxide. The principal greenhouse gas emitted by human activity is carbon dioxide (CO2). Carbon dioxide is released into the atmosphere as a result of the combustion of fossil fuels (coal, natural gas, and oil), solid waste, trees, and other biological materials, as well as chemical processes.Coal, natural gas, and oil production and transportation all generate methane. Livestock and other agricultural techniques, land use, and the breakdown of organic material in municipal solid waste landfills all contribute to methane emissions.learn more about greenhouse effect here:
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Would the pi values of the animal insulins be the same as, greater than, or less than human insulin?
The pI values for animals and human insulin are the same, with the exception of duck and chicken insulin.
What is a pI value?The pI value is the isoelectric point of the protein or amino acid chain. The isoelectric point can be given as the pH value at which the net charge of the insulin molecule is zero.
The insulin molecule is composed of amino acids that are charged at a specific pH. With the change in the pH, charge transfer takes place and results in the net-zero pH at pI.
The changeable amino acids in animal insulin and human insulin are the same. Thus, the pI values for human and animal insulin are the same.
The exceptions to the condition are duck and chicken insulin.
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Final answer:
Animal insulins such as bovine and porcine may have different isoelectric points (pI) compared to human insulin due to variations in amino acid sequences. Recombinant DNA technology enables the production of insulin identical to human insulin, which circumvents the immune response issues caused by animal-sourced insulin.
Explanation:
The isoelectric point (pI) of animal insulins such as those derived from pigs (bovine) and cows (porcine) may differ from that of human insulin due to their amino acid composition differences. Pig insulin differs from human insulin by one amino acid and beef insulin by three. These sequence differences can affect the pI of the insulin molecules because pI is determined by the overall charge of the protein, which in turn is influenced by the presence and position of charged amino acids within the sequence.
Insulin's functionality is also related to its similarity to human insulin. Although animal insulins were effective in treating diabetes, they were recognized by the immune system as foreign, which could lead to an antibody response and require higher doses of insulin for treatment. Furthermore, the animal-derived insulin had the potential to induce other immunological complications.
With the advent of recombinant DNA technology, it has become possible to produce insulin that is identical to human insulin in bacteria like E. coli. This insulin has the same sequence and therefore the same pI as naturally occurring human insulin, eliminating the immune response seen with animal-sourced insulins and allowing for a more consistent and safe treatment for diabetes.
Dan is on his high school swim team. Which muscle is the primary mover that allows him to perform a swimming stroke?
A.
Pectoralis major
B.
Infraspinatus
C.
Latissimus dorsi
D.
Supraspinatus
Answer:
it will be A
Explanation:
Answer:
A Pectoralis major
Based on the information in the table, eating which type of oil would most
likely cause buildup in blood vessels?
Well... a "build up in blood vessels" is actually called a CLOT. That should help you. :)
Answer: The answer is Coconut oil For Apex.
Explanation:
it has the most saturated fat. (85)
Which is not typical of the limbs and locomotion of the primates in general?
not typical, are primates that walk like humans because of the fact that hind quarters, or what we call the tibia are not long enough to withstand the vertical weight of the animal.
Arm Swinging is not typical of the limbs and locomotion of the primates in general.
What is Arm Swinging?Arm swing in human bipedal walking is a natural motion wherein each arm swings with the motion of the opposing leg. Swinging arms in an opposing direction with respect to the lower limb reduces the angular momentum of the body, balancing the rotational motion produced during walking.Arm Swinging is not typical of the limbs and locomotion of the primates in general.
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Where is the spinal cord found? below the frontal lobe in the occipital lobe in the backbone below the thalamus?
The spinal cord is in the backbone (aka spine). The spinal cord is part of the central nervous system
How I remember where the spinal cord is the root of the words spine and spinal cord is similar
Hope this helped!
~Just a girl in love with Shawn Mendes
What are two ways carbon returns from animals into the water?
Answer:
fecal matter and liquids
Explanation:
A blood clot that develops at a distant site and then travels to a blood vessel where it becomes lodged and blocks blood flow is called a(n) embolism. thrombosis. aneurysm. hemorrhage.
I believe it is an embolism
6. A cell is 20 micrometers across. What type of cell is this? A. Plantae B. Prokaryotic C. Animalia D. Eukaryotic
Answer:
D
Explanation:
Eukaryotic cells are usually bigger than prokaryotic cells. Generally, prokaryotes cels size will range between 1 and 10 micrometers while that of eukaryotes will range between 10 – 30 micrometers. Due to the small cell size of prokaryotes, elements can diffuse in and out of the whole cell. However, for eukaryotes, cellular mechanism need to assist the distribution (in and out) of elements in the cell.
Answer:
D. Eukaryotic
Explanation:
1.) The difference in the brightness of two stars with the same surface temperature is attributable to their _____.
colors
densities
ages
sizes
2.) Most responsible for the formation of a star is _____ force.
electromagnetic
gravitational
interstellar
nuclear
3.)Which main-sequence stars are the most massive?
yellow
orange
red
blue
4.) A spinning neutron star that appears to give off radio wave pulses is called a _____.
supernova
white dwarf
pulsar
black hole
5.) Greater redshifts in the spectra of galaxies indicate _____.
faster speeds
lower temperatures
slower speeds
higher temperatures
Answers: 1 .The difference in the brightness of two stars with the same surface temperature is attributable to their sizes.( last choice)
2.Most responsible for the formation of a star is gravitational force.(second choice )
3. Blue ( last choice)
4.
A spinning neutron star that appears to give off radio wave pulses is called a pulsar ( third choice)
5.Greater redshifts in the spectra of galaxies indicate faster speeds ( first choice)
Final answer:
Stars are classified by color, size, and mass. The brightness difference in stars of the same temperature is linked to their sizes. Blue stars are more massive, and redshifts in galaxy spectra indicate higher speeds.
Explanation:
The difference in the brightness of two stars with the same surface temperature is attributable to their sizes. The most responsible for the formation of a star is the gravitational force. Blue stars tend to be more massive than 2 Msun, stars about the size of the Sun are yellow, and stars much smaller are red. A spinning neutron star that appears to give off radio wave pulses is called a pulsar. Greater redshifts in the spectra of galaxies indicate faster speeds.
Kendrew’s studies of the globular myoglobin structure demonstrated that: A) “corners” between α-helical regions invariably lacked proline residue. B) highly polar or charged amino acid residues tended to be located interiorally. C) myoglobin was completely different from hemoglobin, as expected. D) the structure was very compact, with virtually no internal space available for water. E) the α helix predicted by Pauling and Corey was not found in myoglobin.
Answer:
D) the structure was very compact, with virtually no internal space available for water.
Explanation:
John Kendrew was the first scientist who determined the structure of the protein myoglobin and he won the Nobel price for his discovery. He and his colleagues examined the structure of the protein using the X-ray crystallography. He defied myoglobin (oxygen-carrying molecule) as compact ( no water inside the molecule) with lack of symmetry. There were no channels in the protein and the internal volume was small. Hem group was located on the surface.
John Kendrew's studie on myoglobin revealed that the structure was very compact with virtually no internal space for water, polar or charged amino acids are often found on the surface while non-polar amino acids are typically in the interior of the protein. The α-helix structure predicted by Pauling and Corey was indeed found in myoglobin. This understanding is crucial for protein function.
Explanation:John Kendrew's studies on the structure of myoglobin a globular protein provided insightful information about protein structure and amino acid placement. Kendrew's work demonstrated that the structure was very compact with virtually no internal space available for water which suggests answer D is correct. Importantly, polar or charged amino acids were often located on the surface (option A), while non-polar amino acids were typically placed in the interior of the protein (option B). The α-helix structure predicted by Pauling and Corey was indeed found in myoglobin, contradicting option E. Furthermore, 'corners' between α-helical regions lacked proline residue as stated in option A.
This concept also applies to the membrane protein where polar and charged amino acids are found on the surface and non-polar amino acids reside in the interior (option D). This organization of proteins is crucial to their function. Clocking in at every helical turn in an alpha helix 3.6 amino acid residues demonstrate the significant structural role of the α-helix and β-pleated sheet structures in most globular and fibrous proteins. The complex three-dimensional tertiary structure of proteins is also an important element for their function with the nature of the R groups in the amino acids playing a big role in the formation of this structure.
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The _____ species concept is the most applicable to classifying species from the fossil record.
Answer:
Morphological (Morphology)
Explanation:
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.
Humans have more than 100 vestigial structures in their bodies. Comparative morpho. is an important tool that helps determine evolutionary relationships between organisms and whether or not they share common ancestors.
However, it is also important evidence for evolution.
What vital signs would you look at to determine if barbera was having a problem with her lungs?
The vital signs that one would look at to determine if Barbera was having a problem with her lungs are lung sounds and respiratory rate. Details about vital signs are given below.
What are vital signs?Vital signs are a set of measurements of a patient's condition taken regularly to assess the state of bodily functions.
The vital signs show how each body organ is functioning. The common vital signs used in medicine are as follows:
Pulse rateTemperatureRespiratory rateBlood pressureAccording to this question, the vital signs that one would look at to determine if Barbera was having a problem with her lungs are lung sounds and respiratory rate.
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Final answer:
To ascertain if Barbara has lung problems, several vital signs including heart rate, breathing rate, blood oxygen level, and lung sounds are considered. Evidence of hypoxemia, crackling sounds, and abnormal chest radiograph indicators such as shadows or cavitation suggest lung issues like pneumonia.
Explanation:
Indicators of Lung Problems
To determine if Barbara is having a problem with her lungs, a healthcare professional would look at vital signs such as her heart rate, breathing rate, and blood pressure. Additionally, they would assess her blood oxygen level using a pulse oximeter, and listen for abnormal sounds in the lungs through auscultation. With Barbara presenting a slightly elevated heart rate, hypoxemia, and crackling sounds in her lungs during breathing, these observations point toward potential lung issues. The greenish sputum sample and shadow on the chest radiograph further suggest a lung infection, possibly pneumonia.
The presence of crepitation during auscultation can indicate increased resistance in the lungs, which might be a result of an obstruction or infection, causing difficulty in air passage and gas exchange. This scenario could manifest through a patient showing signs such as shortness of breath, a productive cough, and abnormal pulse oximeter readings, as in the cases described for Sacheen and Benjamin, where clogged airways or infection impact blood oxygen levels.
Homologous chromosomes are pairs of chromosomes containing genes that code for __________.a. DNAb. sexc. the same traitsd. different traits
Answer:
d. different traits
Explanation:
Human cell are diploid (with the exception of gametes) which means that they have two sets of chromosomes: one inherited from mother and another inherited from father (23 chromosomes in each set, total of 46 chromosomes per cell). Those chromosomes in pair are called homologous chromosomes, they are the same in size and shape, contain the same genes but code for different traits.