chance events that cause allele frequencies to fluctuate unpredictably from one generation to the next group of answer choices mutation gene flow natural selection genetic drift
Answers
The chance events that cause allele frequencies to fluctuate unpredictably from one generation to the next are genetic drift. Option D is correct.
Genetic drift refers to the random changes in allele frequencies within a population over time. It occurs due to chance events, such as random variations in reproductive success or the loss of individuals carrying certain alleles. These chance events can have a more significant impact on small populations, where genetic drift may lead to the fixation or loss of alleles.
Mutations are the random changes in DNA sequence of genes. While mutations can introduce new genetic variation into a population, they do not necessarily cause immediate fluctuations in allele frequencies.
Gene flow refers to the movement of genes from one population to another through migration and interbreeding. Gene flow can introduce new alleles into a population or alter existing allele frequencies, but it is not driven solely by chance events.
Natural selection is the process by which certain heritable traits become more or less common in a population due to their impact on reproductive success.
Hence, D. is the correct option.
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--The given question is incomplete, the complete question is
"Chance events that cause allele frequencies to fluctuate unpredictably from one generation to the next group of answer choices A) mutation B) gene flow C) natural selection D) genetic drift."--
Related Questions
What are two ways in which the body gainswater?A. Sweating and drinkingB. Sweating and urinationC. Drinking and cellular respirationD. Cellular respiration and urination
Answers
The correct answer is C. Drinking and cellular respiration
During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell and carbon dioxide and water are created as byproducts.
6 O2 (g) + C6H12O6 (aq) → 6 CO2 (aq) + 6 H2O (aq) + ATP
Create a appropriate title for this data table
Answers
Answer:
grade per hours of study
Are leafy sea dragon poisonous?
Answers
Leafy sea dragons are not poisonous. They are considered to be relatively harmless to humans and are not known to cause any serious health effects.
They are also not harmful to other marine life and are typically not considered to be a threat to other species.
Leafy sea dragons, also known as Glauert's sea dragon, are marine fish that are native to the waters off the southern coast of Australia. They are closely related to seahorses and pipefish and are known for their unique leaf-like appendages that help them blend in with their surroundings.
While leafy sea dragons are not poisonous, they are considered to be a vulnerable species, due to the impacts of habitat loss, pollution, and overfishing. It is illegal to collect or harvest leafy sea dragons in Australia, and it is important to respect their natural habitat when observing them in the wild.
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What are the missing products in this model? Check all that apply. 2 ATP 4 ATP 2 pyruvic acid 2 NAD+ CO2
Answers
The given question is incomplete as the model is missing from the question, however, the correct model is attached with the answer :
Answer:
The correct answer is - 2 ATP and 2 pyruvic acids.
Explanation:
The given model represents the glycolysis pathway which is the first of the key metabolic step of cellular respiration. It helps in producing the energy in form of ATP through breaking down a glucose molecule into 2 molecules of pyruvic acid and with a series of enzymatic reactions.
This process also releases energy in the form of 2 molecules of ATP and NADH. The pyruvate or pyruvic acid molecules then moves to the link reaction, where acetyl-CoA is produced.
Thus, the correct answer is - 2 ATP and 2 pyruvic acids.
Answer:
2 ATP 2 pyruvic acid
Explanation:
edge 2020
11) Do you think de-extinction is a good idea? Why or why not?
Answers
De-extinction is a good idea. Using genetic science for reanimation may help adapt existing ecosystems to extreme changes in the environment, like global warming, and potentially reverse them, writes George Church in Scientific American
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carbohydrates are used by the body primarily for group of answer choices short-term energy. antioxidants. tissue growth and healing. sustained energy.
Answers
Carbohydrates are used by the body primarily for short-term energy.
When consumed, carbohydrates are broken down into glucose, which is the primary fuel source for the body's cells. Glucose can be quickly and easily metabolized to produce ATP, the molecule that cells use to store and transport energy. This makes carbohydrates an excellent source of energy for activities that require immediate energy, such as exercise, as well as for supporting essential bodily functions such as brain and organ function. However, carbohydrates can also be stored in the body in the form of glycogen and used to provide sustained energy for longer periods of time.
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A good example of lean meat
Answers
Compared to other varieties of meat, lean meat has a reduced fat content. Skinless chicken breast is an illustration of lean meat.
Thus, around 30 grammes of protein are present in every 100 grammes of cooked chicken breast, making it a superior source of protein. With just around 2-3 grammes of fat per 100 grammes of cooked meat, it is also quite low fat content.
In addition, chicken breast is an excellent source of phosphorus, vitamin B6, and niacin, among other important elements. Chicken breast is frequently suggested for persons attempting to maintain a healthy weight or cut back on their overall fat consumption because of its low low-fat content.
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What are the fundamental methods, models, or theories in
nanotribology? Please be as explicative as you can.
Answers
The fundamental methods, models, and theories in nanotribology include Atomic Force Microscopy (AFM), Molecular Dynamics (MD) simulations, Contact Mechanics, Surface Chemistry, and Lubrication Theory.
Nanotribology, also known as nanoscale tribology, is the study of friction, wear, and lubrication at the nanoscale level. It focuses on understanding the fundamental mechanisms and behaviors of surfaces and interfaces when subjected to relative motion on the nanometer scale.
There are several fundamental methods, models, and theories employed in nanotribology research:
Atomic Force Microscopy (AFM): AFM is a widely used technique that allows for the measurement and manipulation of surfaces at the atomic and molecular scale. It provides detailed information about surface topography, friction, and adhesion forces.
Molecular Dynamics (MD) Simulations: MD simulations use numerical methods to simulate the motion and interactions of atoms and molecules. These simulations provide insights into the behavior of surfaces, lubricants, and additives at the nanoscale, allowing for the prediction of friction and wear properties.
Contact Mechanics: Contact mechanics is the study of the deformation and interaction between contacting surfaces. It involves the analysis of forces, stresses, and deformation at the interface, which helps in understanding the origins of friction and wear.
Surface Chemistry: Surface chemistry plays a crucial role in nanotribology. It involves studying the chemical composition, structure, and reactivity of surfaces, as well as the formation of boundary layers and tribofilms during sliding.
Lubrication Theory: Lubrication theory focuses on understanding how lubricants reduce friction and wear between surfaces. It includes concepts such as boundary lubrication, hydrodynamic lubrication, and elasto hydrodynamic lubrication, which describe different mechanisms of lubrication at the nanoscale.
These methods, models, and theories collectively contribute to advancing our understanding of nanotribology and have applications in various fields, including materials science, nanotechnology, and engineering.
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which aspect of el nino can give scientists a preview of earth as temperatures rise with global warming?
Answers
Answer:
Its warming of sea surface temperatures
Answer:
its warming of sea surface temperatures
Explanation:
Bio Trad Bench 1 Jackson MS 2021-2022
Section 1
2 of 302 of 30 Items
Item 2
A scientist performs an experiment where part of a viral sample is placed in a nutrient solution with bacteria and the other part in a nutrient solution without bacteria. Over the next two days, each solution is analyzed every two hours to measure the total amount of viral DNA.
Does the data support that the virus is a living thing?
Yes. The total amount of viral DNA increases or stays the same in both samples.
Yes. The total amount of viral DNA increases or stays the same in both samples.
Yes. The total amount of viral DNA increases when there is a source of nutrients.
Yes. The total amount of viral DNA increases when there is a source of nutrients.
No. The total amount of viral DNA with bacteria never shows a decrease in concentration.
No. The total amount of viral DNA with bacteria never shows a decrease in concentration.
No. The total amount of viral DNA only increases in the presence of another living thing.
No. The total amount of viral DNA only increases in the presence of another living thing.
Answers
Determine whether human and chimpanzee mitochondrial DNA sequences have equal evolutionary rates between lineages. To do this, use Tajima’s relative rate test as implemented in MEGA. (1) Obtain MEGA software. (2) Obtain mitochondrial DNA sequences from human, chimpanzee, bonobo, orangutan, gorilla, and gibbon (3) Apply Tajima’s test using an appropriate outgroup. Is the probability value significant (< 0.05)? Include pictures of everything if possible
Answers
Tajima's relative rate test is used to compare the evolutionary rates between different lineages by analyzing the divergence of DNA sequences.
To determine whether human and chimpanzee mitochondrial DNA sequences have equal evolutionary rates between lineages, Tajima's relative rate test can be applied using MEGA software.
The steps involved are as follows:
Obtain MEGA software: Download and install MEGA software, which is a widely used tool for molecular evolutionary analysis.
Obtain mitochondrial DNA sequences: Collect mitochondrial DNA sequences from human, chimpanzee, bonobo, orangutan, gorilla, and gibbon. These sequences can be obtained from databases or through relevant research studies.
Apply Tajima's test with an appropriate outgroup: Use MEGA software to perform Tajima's relative rate test. Select an appropriate outgroup, which could be a closely related species or a known reference sequence.
Analyze the results: The output of Tajima's test will include statistical measures such as probability values. Check if the probability value is significant (less than 0.05). If the probability value is below the significance threshold, it indicates that the evolutionary rates between human and chimpanzee mitochondrial DNA sequences are significantly different.
In conclusion, by applying Tajima's relative rate test using MEGA software and appropriate mitochondrial DNA sequences, one can determine the significance of the evolutionary rate differences between human and chimpanzee lineages.
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what is the episcleral (periscleral) space?
Answers
The episcleral or periscleral space is a narrow area located between the sclera, the tough outer layer of the eye, and the conjunctiva, the thin layer of tissue that covers the sclera and lines the inside of the eyelids.
The periscleral space contains a small amount of fluid called the episcleral or periscleral fluid, which is important for maintaining pressure within the eye.
This pressure, known as intraocular pressure (IOP), is necessary to maintain the shape of the eye and to provide the nutrients and oxygen necessary for the health of the eye's tissues.
The periscleral space is also important for the drainage of aqueous humor, a clear fluid that fills the front of the eye and helps to maintain the IOP.
Aqueous humor is produced in the ciliary body and flows through the pupil into the anterior chamber of the eye, where it is drained out of the eye through the trabecular meshwork and into the periscleral space.
From there, it is absorbed into the bloodstream or the lymphatic system.
Disorders of the periscleral space, such as increased IOP or obstruction of aqueous humor drainage, can lead to conditions such as glaucoma, which can cause damage to the optic nerve and potentially lead to vision loss.
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What is a characteristic of quasi-experimental/causal-comparative research? *A. assignment to groups based on some pre-determined characteristicB. does not establish cause and effect relationshipsC. has the highest degree of control over the factors being examinedD. assignment to groups is random in nature
Answers
EXPLANATION: A quasi-experimental research is not true experimental research because instead of assigning participants randomly in either the control group or treatment group, it is pre-determined. The control and treatment groups also have different conditions and variables being tested that the researchers themselves do not have control over. This type of experiment is often conducted in research in educational settings.
ANSWER: A. assignment to groups based on some pre-determined characteristic
PLEASE HELP ME!!!!!!!!! What are the major tissues and their functions in a vascular plant?
Answers
Vascular tissue does the job of transporting water, minerals, and sugars to different parts of the plant such as leaves, etc. Vascular tissue is made of two specialized conducting tissues named as xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant through the stem and also supports the plant, stem too.
Ways to memorise and never forget?
Answers
Answer:
sleep earlier
Explanation:
Answer:
Write things down
Explanation:
Which is the most important product of cellular respiration?
(A) ATP
BADP
C) NADH
D FADH₂
Answers
Answer:
A:
ATP
Explanation:
Science yeah
What caused the Himalyan Mountains?
Answers
Answer:
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided. Because both these continental landmasses have about the same rock density, one plate could not be subducted under the other.
Explanation:
Answer:
This immense mountain range began to form between 40 and 50 million years ago, when two large landmasses, India and Eurasia, driven by plate movement, collided.
i learned this before
After suffering a stroke, a patient can see objects anywhere in front of him, but pays attention only to objects in his right field of vision. When asked to describe these objects, he has difficulty judging their size and distance. What part of the brain was likely damaged by the stroke?.
Answers
Based on the symptoms described, such as difficulty paying attention to objects in the left field of vision and trouble judging size and distance, it is likely that the patient's stroke damaged the right parietal lobe. This area of the brain is responsible for processing spatial awareness, attention, and visual information from both fields of vision. Damage to this region can result in the mentioned symptoms.
Based on the symptoms described, it is likely that the stroke damaged the patient's parietal lobe, specifically the right parietal lobe. The parietal lobe is responsible for processing sensory information, including visual information related to spatial awareness, depth perception, and judgment of size and distance. This is consistent with the patient's difficulty judging the size and distance of objects in his right field of vision. The fact that the patient can still see objects anywhere in front of him suggests that the stroke did not affect his overall visual acuity, but rather his ability to properly process visual information in a specific area of his brain. This type of stroke can have significant impacts on a person's daily life and require ongoing rehabilitation.
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How many neutrons does Phosphorus have? Use the diagram below to help find the amount:
Answers
Answer:
16
Explanation:
The small subunit of Rubisco is made up of many monomers. Describe the general structure of one of these monomers, including the characteristic that would allow it to interact with a negatively charged monomer in a second Rubisco polypeptide
Answers
The monomers of the small subunit of Rubisco, also known as Rubisco small subunit (RbcS), are typically composed of a single polypeptide chain. The general structure of one of these monomers includes a primary sequence of amino acids that fold into a specific three-dimensional structure.
Within the monomer, there is a specific region called the active site. This active site contains a conserved lysine residue (Lys-201) that plays a crucial role in the interaction with a negatively charged amino acid, such as aspartate (Asp), in a second Rubisco polypeptide. The interaction between the positively charged lysine and negatively charged aspartate facilitates the formation of a bridge called an ion pair. This ion pair is essential for maintaining the stability and proper functioning of the Rubisco enzyme complex.
The interaction between the monomers through the ion pair bridges is significant for the assembly and stability of the Rubisco enzyme, as well as for its catalytic activity in the carbon fixation process during photosynthesis.
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plsss help asap omg T-T
Answers
Breathing allows us to take in Oxygen and removes carbon dioxide.
When we inhale the ribs expand and make room for the lungs to fill with air.
These are the only ones I know I am so sorry but I hope it helps.
Formed elements of blood include which of the following structures?
Cell Fragments and Cells.
Answers
The formed elements of blood include red blood cells, white blood cells, and platelets. Red blood cells carry oxygen, white blood cells defend against infections, and platelets help in blood clotting.
The formed elements of blood are the cellular components that are responsible for various functions in the body. These include:
red blood cells (erythrocytes): Red blood cells are the most abundant formed elements in the blood. They contain a protein called hemoglobin, which enables them to carry oxygen from the lungs to the body's tissues. Red blood cells also help remove carbon dioxide, a waste product, from the body.white blood cells (leukocytes): White blood cells are an essential part of the immune system. They help defend the body against infections and diseases by identifying and destroying pathogens, such as bacteria, viruses, and fungi. There are different types of white blood cells, each with specific functions.platelets (thrombocytes): Platelets are small cell fragments that play a crucial role in blood clotting. When a blood vessel is damaged, platelets gather at the site to form a clot, preventing excessive bleeding. They release substances that promote clotting and help repair the damaged blood vessel.These formed elements are produced in the bone marrow, the soft tissue inside bones. They are vital for maintaining overall health and proper functioning of the body.
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Formed elements of blood include both cell fragments and cells. Formed elements are solid structures within the blood that make up a considerable part of the blood. This includes cells such as erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets), as well as cell fragments such as micelles and vesicles that have separated from larger cells.
According to the structure of the blood, the cells can be classified into two types: formed elements and plasma. The formed elements are the cells and cell fragments suspended in the plasma that make up about 45% of the blood volume.
The plasma is the liquid component that makes up about 55% of the blood volume. The formed elements of the blood include both cell fragments and cells.Cells, such as erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets), are the solid structures in the blood that make up a considerable part of the blood.
The erythrocytes are the most abundant formed elements that transport oxygen throughout the body. The leukocytes are responsible for fighting infection and diseases in the body. The platelets play a crucial role in blood clotting and help to stop bleeding by sticking to the site of a damaged blood vessel. Cell fragments such as micelles and vesicles that have separated from larger cells are also formed elements of the blood.
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Describe how light enters into your eye. Be sure to use the following vocabulary: cornea, pupil, lens, retina, and
optic nerve.
Answers
Answer:
retina
Explanation:
The expression of a genotype is called a.....
a
nucleus
b
chromosome
c
phenotype
d
translation
Answers
Answer:
its B
Explanation:
i might be wrong but i hope i helped
Which of the following best describes the velocity of an object?
30 m east
30 m/s2
30 m/s
30 m/s east
Answers
Answer:
The correct answer is :B
Explanation:
I just know it is so trust me :)
Which is NOT true of homologous chromosomes?
a. They have genes that are in the same order
b. They have genes for the same traits
c. They are identical
d. They are in pairs
Answers
All the given statements are true about homologous chromosomes. But option c is incorrect because homologous chromosomes are non-identical.
A homologous chromosome is one of two that share identical gene sequences, locations, chromosomal lengths, and centromere positioning. A homologous pair is made up of one paternal and one maternal chromosome.
There are identical genes in the same order on each chromosome in a homologous pair, but there may be differences between them that give rise to different alleles. Genes for the same trait are present on both chromosomes in a homologous pair.
One is maternal and the other is paternal so homologous pairs are not identical. These chromosomes are similar but not identical because different alleles may exist for different traits.
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the drug is absorbed or taken into the blood- stream by the capillaries from an area of higher concentration to an area of lower concentration. this process of diffusion is a
Answers
The drug is absorbed or taken into the bloodstream by the capillaries from an area of higher concentration to an area of lower concentration. this process of diffusion is a Passive transport.
A type of membrane transport called passive transport moves materials across cell membranes without the use of energy. Active transport uses cellular energy to transfer materials across cell membranes, whereas passive transport uses the second law of thermodynamics.
Passive transport is a phenomena that happens naturally and doesn't require the cell to use energy to move. Diffusion is the process by which chemicals travel passively from a region of higher concentration to a region of lower concentration.
The rate of diffusion is influenced by the gradient in concentration, the size of the diffusing particles, and the system temperature.
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Abe knew from his anatomy class that there are three different kinds of muscle tissue in the body. He knew lifting weights would help build the skeletal muscle and that running was good for cardiac muscle health. He was surprised to find out that his blood vessels had smooth muscle, so his exercise regimen was actually benefitting all the muscle types of his body. Correctly sort each of the characteristics into the appropriate category.
Answers
Answer:
Three different kinds of muscles are -:
SKELETAL MUSCELES CARDIAC MUSCLES SMOOTH MUSCLESExplanation:
SKELETAL MUSCLES -: There are long, cylindrical, and striated skeletal muscle cells. They are multi-nucleated, which means they have more than one nucleus. This is because from the fusion of embryonic myoblasts, they are created. Each nucleus controls the sarcoplasm's metabolic demands around it. There are high energy requirements for skeletal muscle cells, because they contain several mitochondria in order to generate adequate ATP. Examples of skeletal muscles: arms and legs- The muscles that belong to the arms and legs feature in pairs. Abdomen and Back- These muscles are connected to the various sets of skeletal muscles that run across the torso.CARDIAC MUSCLES -: Cardiomyocytes have a short and narrow outline and are fairly rectangular. They are about 0.02 mm wide and 0.1 mm (millimetres) long, respectively. There are many sarcosomes in cardiomyocytes, which provide the required energy for contraction. Cardiomyocytes usually contain a single nucleus, unlike skeletal muscle cells. Cardiomyocytes, although they contain more sarcosomes, normally contain the same cell organelles as skeletal muscle cells. example - cardiac muscle is present in heart. SMOOTH MUSCLES -: Smooth muscle cells have a single central nucleus and are spindle-shaped. They range in length from 10 to 600 μm (micrometers), and are the tiniest type of muscle cell. In the expansion of organs like the kidneys , lungs, and vagina, they are elastic and therefore essential. As in cardiac and skeletal muscle, the myofibrils of smooth muscle cells are not aligned, meaning they are not striated, hence the term smooth. example of smooth muscles -: Walls of blood vessels , Walls of stomach , Ureters , Intestines , In the aorta (tunica media layer), Iris of the eye. ,Prostate and Gastrointestinal Tract.Soft tissues composed of long cells are called muscles. They are of various types like cardiac, skeletal and smooth based on their functions and locations.
What are the characteristics of the various muscles?Skeletal muscles are cylindrical and striated muscles that have many nuclei and are voluntary. They have many mitochondria in them and have higher energy expenditure and generation. They are found in the arms, legs and abdomen region.
Smooth muscles are longitudinal and spindle-shaped muscles and are uninucleated. They are non-striated, lacks sarcomere and are elastic. They have the greatest capability of regeneration and are found in the intestines, eyes, stomach and many other organs.
Cardiac muscles are the muscles made up of cardiomyocytes and have many sarcomeres, and gap junctions for the coordinated contractions. The muscles are connected by intercalated discs and have rhythmicity. They are found in the heart.
Therefore, cardiac, smooth and skeletal are the types of muscles.
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One parent has dimples, which is a dominant trait. The other parent has no dimples which is a recessive trait.
Dd
d
d
What can be predicted about their offsprings' chances of having dimples?
A 75% will have dimples
B 25% will have dimples
0% will have dimples
50% will have dimples
E 100% will have dimples
Answers
Why Wegener is not qualified to be proposing theories in the fields of geology and Earth history?
Answers
Answer:
Wegener is not qualified to propose theories in the fields of geology and the history of the Earth because there was no mechanism available to endorse his proposals and offer a convincing and truthful explanation, hence the rejection of the Continental Drift, the theory That made him famous.
Explanation:
Wegener is not qualified to propose theories in the fields of geology and the history of the Earth because there was no mechanism available to endorse his proposals and offer a convincing and truthful explanation, hence the rejection of the Continental Drift, the theory that made him famous.
What is north pole and south pole?The north pole has been known as the northernmost point present on earth, and on the other hand south pole has been known as the southernmost part or the point of the earth. The area present in between south pole and north pole has been said that it has been extremely cold and the area present near the equator has extremely hot.
The area of north pole has not the part of any country or the north pole does not lie in any country. The main reason of the coldness of the north pole and south pole has that they do not receive any direct sunlight. The best time to visit the north pole has the time of June and July because in this month the ice of the north pole is thinner as compared to other months.
Therefore, Wegener is not qualified to propose theories in the fields of geology and the history of the Earth because there was no mechanism available to endorse his proposals and offer a convincing and truthful explanation, hence the rejection of the Continental Drift, the theory that made him famous.
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