What is true of the trait whose frequency distribution in a large population appears above?
It has probably undergone
A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) sexual selection.
E) random selection.
Answers
To accurately determine the trait's selection mechanism based solely on its frequency distribution in a large population, additional information or analysis would be required. Frequency distributions alone do not provide a definitive indication of the specific selection mechanism acting on a trait.
However, we can briefly discuss the concepts of each selection mechanism:
A) Directional selection: This occurs when individuals with one extreme of the trait distribution have a higher fitness and are favored by natural selection, leading to a shift in the population towards that extreme.
B) Stabilizing selection: This occurs when individuals with intermediate values of the trait have higher fitness, leading to a reduction in variation and a narrower distribution of the trait in the population.
C) Disruptive selection: This occurs when individuals with extreme values of the trait have higher fitness, resulting in a bimodal distribution with the two extremes being favored.
D) Sexual selection: This occurs when certain traits are favored for mating success, often leading to the development of elaborate or exaggerated traits in one sex, such as bright colors or elaborate courtship displays.
E) Random selection: This refers to changes in allele frequencies due to random events, such as genetic drift, rather than due to selective pressures.
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Related Questions
The most effective sites for self-stimulation for reward are along the trajectory of the ______________ axons arising in the ventral __________ area and projecting to the forebrain.
Answers
Answer:
The answer is dopamine, tegmental
Explanation:
The most effective sites for self- stimulation for reward are along the trajectory of the Dopamine axons airising in the ventral Tegmental area and projecting to the forbiden.
You have just received a grade on your first major examination in biology, and it is not as high as you had
hoped. You wanted an "A" and you earned a "C." You talk to your professor and do a lot of thinking about
what might have gone wrong. Perhaps your mistake was reviewing your notes only before the exam rather
than every night. Or perhaps you made some other mistakes.
Answers
Receiving a grade below your expectations can be disheartening and demoralizing. It's crucial, though, to take this as a learning opportunity rather than a setback. The first thing to do after receiving a lower grade is to evaluate the possible reasons for the grade.
One of the reasons might have been because of the lack of studying and preparation, or perhaps a misunderstanding of the topics or key concepts. As a student, it's important to assess the situation and determine the best approach to improve in the future.
In this particular scenario, studying habits might be a potential cause for the lower grade. One of the mistakes was possibly reviewing notes only before the exam rather than every night. This error could have affected the ability to remember and understand the course material.
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Why does Earth have a lower amount of carbon in the atmosphere than planets such as Venus and Mars? Carbon is released into the air during plant decomposition The carbon escapes Earth's atmosphere faster than it is being absorbed Most of Earth's carbon can be found in the proteins and lipids of organisms Plants take in carbon dioxide from the atmosphere for photosynthesis.
Answers
Answer: Earth's vulcanism-driven atmosphere was likely dominated by carbon dioxides like Venus and Mars.
Explanation: Earth also has vast oceans of liquid water. Carbon dioxide dissolves easily in water, so our oceans absorbed much of the atmospheric CO2, leaving an atmosphere dominated by ammonia.
Question 1
Which of the following is a function of the cell membrane?
breaks down lipids, carbohydrates, and proteins from foods
O stores water, salt, proteins, ang carbohydrates
keeps the cell wall in place
O regulates which materials enter and leave the cell
Answers
Decomposers (like bacteria and fungi) are not included in this food web. Explain the role of decomposers in nature. Why are they so important?
I NEED HELP WITH THIS PLEASE!!!!
Answers
Answer:
please give me brainlist and follow
Explanation:
Thanks to decomposers, nutrients get added back to the soil or water, so the producers can use them to grow and reproduce. Most decomposers are microscopic organisms, including protozoa and bacteria. ... Instead, fungi get all their nutrients from dead materials that they break down with special enzymes.
when does forked line method fail
Answers
Answer:
The forked-line method is a technique used to infer the evolutionary relationships between different species, also known as phylogenetics. The method is based on the comparison of morphological or molecular characters among different species, and it is widely used in evolutionary biology.
The forked-line method can fail in cases where the characters used for comparison are not informative or where the characters used for comparison are convergent, meaning that different species have evolved the same character independently. Additionally, the method can fail in cases where the data is ambiguous, or where the evolutionary relationships are very complex, such as in cases of hybridization or horizontal gene transfer. Also, if there is not enough data or if the data is too noisy, the method can fail to infer the correct evolutionary relationships.
It's important to note that there are many other methods, such as maximum likelihood, Bayesian inference and maximum parsimony, to infer the evolutionary relationships, which can help to overcome some of the limitations of the forked-line method.
Forked-Line Method.The forked-line method is used when more than two genes are being considered, as the Punnett-square method becomes unwieldy.
The forked-line method can be used to analyze a trihybrid cross. However, the information provided in the question does not specify a situation when the forked-line method fails.For instance, examining a cross involving four genes would require a 16 × 16 grid containing 256 boxes. It would be extremely cumbersome to manually enter each genotype
The forked-line method is a method used in genetics to analyze trihybrid crosses. It provides the probabilities of various traits being expressed in the offspring generation. This method is used when the Punnett-square method becomes too cumbersome, for example, in a cross involving four genes which would require a 256 box grid. However, it is not mentioned in the provided search results as to when the forked-line method fails.
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What is the highest level of organization?
Answers
Answer: domain
The domain of a thing is the highest ranking of classification.
Answer: biosphere?
Explanation:
Checkpoints occur between the stages of the cell cycle. If a cell does not meet certain criteria at the end of a stage, it will not move to the next stage. Which of these occurs just before the g2 stage of the cell cycle.
Answers
Between each stage of the cell cycle, checkpoints happen. A cell won't advance to the next stage if, at the end of one stage, it doesn't meet a set of requirements. Just before the cell cycle enters the g2 phase, DNA replication occurs.
Control systems known as cell cycle checkpoints monitor the consistency, fidelity, and sequence of the major cell cycle events. Reaching the ideal cell size, maintaining the integrity of the chromosomes, and ensuring appropriate chromosome segregation during mitosis are a few of these.
The G2 checkpoint blocks entry into the mitotic phase if certain conditions are not satisfied. In a manner similar to that of the G1 checkpoint, protein reserves and cell size are assessed. To ensure that all of the chromosomes have been duplicated and that the DNA that has been replicated has not been damaged, the G2 checkpoint's main duty is to check for both of these conditions. If DNA abnormalities are detected by the checkpoint mechanisms, the cell cycle is halted, and it then makes an attempt to either complete DNA replication or repair the damaged DNA.
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Which of the following materials would allow the flow of electricity?
A.) cotton
B.) plastic
C.) aluminum
D.) rubber
Answers
Answer:
Aluminium
Explanation:
Aluminium is a conductor of electricity and heat
The following materials would allow the flow of electricity: the aluminum that is present in Option C, as the aluminum is a good conductor of electricity, while the rubber and plastic are not good conductors.
What is the conductor in electricity?Good conductors of electricity are metals such as gold, silver, aluminum, and so on, and electricity can easily pass through them, whereas non-metals are not good conductors of electricity, such as rubber, plastic, and cotton, which are not metals. The electricity can easily pass through a salt solution, and when a person touches the water while working with the electricity, they get shocked.
Hence, the following materials would allow the flow of electricity: the aluminum that is present in Option C, as the aluminum is a good conductor of electricity, while the rubber and plastic are not good conductors.
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2. What molecules are involved in carbon cycle?
Answers
Answer- The main elements involved in carbon cycle are carbon oxygen and Hydrogen and these make up tw reactants and products of both photosynthesis and cellular respiration reaction
Explanation- hope u like it
This diagram represents the cell cycle. When cells leave the cell cycle, they exit during G1 phase and then enter G0 phase, a resting period. Most normal cells can leave G0 phase and reenter the cell cycle at G1 phase before entering S phase. Cancer cells are different because they cannot enter G0 phase and are likely to do which of the following?
A Fail to complete S phase
B Continuous unregulated cell division
C Mutate during G phase
D Die after completing mitosis
Answers
In pea plants, the allele that produces purple flowers (P) is dominant to the allele that produces white flowers (p), and the allele that produces tall plants (T) is dominant to the allele that produces short plants (t). Two pea plants are crossed and produce 521 offspring, and the results of this cross are shown below:
Phenotype Number of offspring
Tall with purple flowers 291
Short with purple flowers 97
Tall with white flowers 101
Short with white flowers 32
Which cross would MOST LIKELY lead to this outcome?
Pptt × ppTt
pptt × PPTT
PpTt × PpTt
ppTT × PpTt
Answers
Answer: PpTt x PpTt
Explanation:
The cross PpTt × PpTt leads to the phenotype Number of offspring Tall with purple flowers 291 Short with purple flowers 97 Tall with white flowers 101 Short with white flowers 32, hence option C is correct.
What is a dihybrid cross?Two creatures that are identically hybrid for two characteristics are said to have mated to create a dihybrid cross. When an organism is heterozygous, it signifies that there are two distinct alleles present at a certain genetic location.
An attempt in producing two creatures that are identical hybrids for two qualities is a dihybrid cross.
The people with this sort of character are homozygous for that particular trait.
Therefore, to put it another way, a dihybrid cross is a union of two organisms that are heterozygous for two separate features, hence option C is correct.
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A lady beetle has black spots on its back similar to its parents. Where are the instructions stored to provide the information for the lady beetle spots?
Answers
Answer:monochromatic
Explanation:
An organism that is used to control the population size of another organism is called a(n)
HELP
Answers
Answer:
Protists
Explanation:
Protists are one-celled, or simple multi-celled organisms. Some of them are pathogenic and can be considered useful in population control.
She most likely suffers from hyposmia as Jennifer suffers from a decreased sense of smell because of repeated colds and allergies. Thus, option C is correct.
What is Anosmia?"Anosmia" refers to a condition in which a person loses his sense of smell. This could either be a "temporary loss of smell" or "permanent loss of smell." A temporary loss of smell may be caused by a cold while permanent loss of smell may be caused by aging or injury to the nerves.
"Parosmia" refers to a condition in which a person's sense of smell is distorted or changed. This means that a person may think something smells awful when in reality, it smells good.
This could either be a "temporary loss of smell" or "permanent loss of smell." A temporary loss of smell may be caused by a cold while permanent loss of smell may be caused by aging or injury to the nerves.
Therefore, She most likely suffers from hyposmia as Jennifer suffers from a decreased sense of smell because of repeated colds and allergies. Thus, option C is correct.
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5. Fossils in lower rock layers are always
O
more complete
O older
O younger
more plentiful
Answers
older
the deeper you dig into the earth, the farther back into history you are going.
Task:
write in tabular form
1. The method, observation and conclusion when carrying out tests for the following:
a. Reducing sugars
b. Lipids
c. Proteins
d. Starch
Thank you
Answers
Reducing Sugars : 1. Benedict's test2. Fehling's test3. Barfoed's test.. A brick-red precipitate indicates the presence of reducing sugar.The absence of a brick-red precipitate implies that there is no reducing sugar.The reddish-brown precipitate suggests the existence of monosaccharides.The existence of disaccharides is revealed by the green precipitate.
When conducting tests for reducing sugars, lipids, proteins, and starch, different methods, observations, and conclusions are employed. The methods used to carry out these tests differ depending on the substances being tested.The table below shows the methods, observations, and conclusions when carrying out tests for reducing sugars, lipids, proteins, and starch. Method Observation Conclusion
Lipids : 1. Emulsion test2. Solubility test .The formation of a milky white layer indicates the presence of lipids.The absence of a milky white layer implies the absence of lipids.The sample forms two separate layers during the test.The fat in the sample is the upper layer.
Proteins : 1. Biuret test2. Xanthoproteic test3. Millon's test The sample turns purple when Biuret's reagent is added to it.A yellow colour develops when Xanthoproteic acid is added to the sample.A brick-red precipitate shows that Millon's reagent was present.The existence of peptides or proteins is revealed by a purple or violet colour.
Starch : 1. Iodine testThe blue-black colour in the sample indicates the existence of starch.Absence of a blue-black colour shows the absence of starch.
Therefore, the above table indicates that the methods used, observations made, and conclusions drawn when carrying out tests for reducing sugars, lipids, proteins, and starch differ depending on the substances being tested.
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The term "hydrophobic" means water-fearing true or false
Answers
Answer:
true
Explanation:
hydro/hydra = water
phbic/phobia = scared
People came from monkeys explain why this is wrong
Its wrong but can u explain it
Answers
i...
ask your parents....
plz...
not infront of many peoole on brainly..
In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins?
Answers
Answer:
F
Explanation:
It is F because ribosomes can be found on rough endoplasmic reticulum.
Hope it helps.
gray wolf vs grizzly bear. Who will win?
Answers
Answer:
Grizzly bear, give me brainliest answer pls
Tommy is investigating a strain of bacteria. He observes that the bacteria is only found in environments with a ph range from 6 to 8. His lab partner prepares a growth medium for this bacteria with a ph of 5. Which explanation best predicts what will happen to the bacteria grown in this growth medium?.
Answers
Answer:
The bacteria will quickly die because the growth medium is too acidic for survival.
Explanation: it was only found in 6 to 8 pH range so it will not survive in pH of 5
(Systems in Action)
1 ) Work is energy in action, It is measured in
A ) Newton’s
B ) Joules
C ) Kilograms
D ) You can’t measure work
2 ) An ax is which type of machine?
A ) A first-Class lever
B ) A wedge
C ) A pulley
D ) An incline plane
3 ) True or False - There are two types of levers
A ) True
B ) False
4 ) 9.8N = ___kg
A ) 3kg
B ) 1kg
C ) 1.5kg
Answers
Answer:
1) D
2) B
3) True
4) B
Explanation:
the ecological footprint of the average u.s. citizen is significantly larger than the global average. what would happen if all humans on earth each had an ecological footprint that matched that of a typical american?
Answers
If all humans on earth each had an ecological footprint that matched that of a typical American, the global environment would be heavily impacted due to the overconsumption and waste of natural resources.
What is footprint?A footprint is a measure of the impact that an individual or organization has on the environment. It is a way to assess how much of the world’s resources are being used and how much waste is being produced. Footprint calculation involves measuring the amount of energy and materials used, the amount of pollution created, the amount of land and water used, and other factors. By understanding the environmental impacts of different activities, it is possible to identify areas of improvement and reduce the environmental footprint of an individual or organization.
The effects would likely include more air and water pollution, soil degradation, biodiversity loss, and an increase in greenhouse gas emissions. This could lead to more extreme weather, desertification, and an overall decline in the health of the planet. Ultimately, it would be unsustainable for all humans to have an ecological footprint as large as the average American.
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what is a syndrome? * 2 points a) a characteristic facial appearance b) a group of traits, all of which must be present if an aneuploidy is to be diagnosed c) a group of traits typically found in conjunction with a particular chromosomal alteration or gene mutation d) a characteristic trait usually given the discoverer's name
Answers
A syndrome is a group of traits typically found in conjunction with a particular chromosomal alteration or gene mutation.
Genetic mutations are when the DNA sequence of a gene is changed to produce a different outcome. That gene's DNA sequence has been irreversibly changed. Genetic variations are essential for human development, which is the process of change across many generations. One individual experiences a spontaneous genetic mutation.
Mutations can result through viral infection, errors in DNA replication during cell division, and exposure to mutagens. Germline mutations, which occur in eggs and sperm as opposed to somatic mutations, which occur in body cells, can be passed on to progeny.
A morphological or numerical change in one or more chromosomes, affecting the autosomes, sex chromosomes, or both, is what is known as a chromosomal abnormality, also known as a chromosomal aberration.
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(will give brainliest if correct)
Which resource is sometimes unpredictable in terms of energy production?
coal
wood
gasoline
natural gas
Answers
Answer:
Coal and/or wood
Have a nice day / night!
Which form of nitrogen in the soil is usable by organisms?
Answers
Answer:
Amonnia the s the userble form of nitrogen by organisms in the soil
Answer:
Nitrate and Ammonia
Explanation:
Nitrate used for plant growth
Ammonia used directly in proteins
Z
S
I
Growing
Polypeptide
Chain of Amino Acids
JA.
Peptide Bond
E.
F
BA
Amino acid
10
B.
Answers
The components involved in protein synthesis are A. Ribosome, B. mRNA, C. tRNA, D. translation, E. Anticodon, F. Codon
What are the components involved in the protein synthesis?Protein synthesis is the process by which cells build proteins. This process involves a number of components and steps, which are essential for the production of functional proteins. The key components involved in protein synthesis are:
DNA: DNA is the genetic material that contains the instructions for building proteins. The sequence of nucleotides in the DNA determines the sequence of amino acids in the protein.
mRNA: The RNA transcript that is produced during transcription is called messenger RNA (mRNA). This molecule carries the genetic information from the DNA to the ribosome, where it will be used to synthesize a protein.
Translation: The second step in protein synthesis is translation, which is the process of converting the mRNA sequence into a sequence of amino acids that will make up the protein. This process occurs on the ribosome, which is a complex molecular machine composed of proteins and RNA.
tRNA: Transfer RNA (tRNA) molecules play a crucial role in translation by carrying amino acids to the ribosome. Each tRNA molecule has a specific sequence of nucleotides that corresponds to a particular amino acid. The tRNA binds to the mRNA on the ribosome and transfers its amino acid to the growing protein chain.
Ribosome: The ribosome is the molecular machine that carries out the translation process. It is composed of two subunits, each of which contains proteins and RNA molecules. The ribosome reads the mRNA sequence and catalyzes the formation of peptide bonds between the amino acids carried by the tRNA molecules.
In summary, the process of protein synthesis involves transcription, translation, and post-translational modifications, which require the participation of various molecular components such as DNA, mRNA, tRNA, ribosomes, amino acids, codon, and anticodon.
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Imagine that today at 1:00 pm, a single Salmonella bacterial cell landed on potato salad sitting on your kitchen counter. Assuming optimal conditions for bacterial growth, how many bacterial cells will be present at 3:00 pm today?
Answers
64 bacterial cells will be present at 3:00 pm today. The kitchen provides an optimal environment for bacterial growth for Salmonella. So, Salmonella will reproduce by binary fission.
Salmonella germs thrive in the ideal conditions that the kitchen offers.
Therefore, Salmonella will divide in two through binary fission.
Salmonella needs just 20 minutes to replicate one bacterial cell into two identical ones at 1 o'clock.Salmonella produces 8 identical bacterial cells and three rounds of replication in one hour.By the end of the second hour, each of the eight bacterial cells has multiplied three times. As a result, there will be 64 bacterial cells total of Salmonella.To learn more about Salmonella Please click on the given link:
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9 An astronomer uses a telescope to observe a star. She observes that the color of
this star is similar to the color of the sun. Therefore, she infers that the star and
the sun have similar sizes and surface temperatures. Using this information,
what can the astronomer conclude about the star?
A The star is a white dwarf.
B The star is cooler than a blue star.
C The star is brighter than a red giant star.
D The star is more distant than most other stars in our galaxy.
40028
Answers
The star is a white dwarf. Therefore option (A) is correct.
What is a star?A star is a celestial object that produces light and heat through nuclear fusion reactions in its core. Stars are made up of hot, dense gas and have their own gravity, which helps them maintain their shape. They are classified based on their temperature, size, and luminosity.
Most stars are part of a galaxy and are found in clusters called star systems. The sun is a star and is the closest star to Earth. Stars play a crucial role in the evolution of the universe and are essential for the formation and survival of planets, including Earth.
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Name the hormones and describe the changes that occur during puberty (males and females)
Answers
The testicles are instructed by the hormones to produce sperm and the hormone testosterone. When hormones are present in females, the ovaries are instructed to produce the hormone estrogen, which also causes the eggs to develop and release. The adrenal glands, a pair of glands that are located on top of the kidneys, produce additional hormones associated with puberty.
Which hormones alter during puberty?
Throughout puberty, the hypothalamus pituitary unit starts to work like an adult's. The pituitary reacts by secreting higher levels of gonadotropins, FSH and LH, in a pulsatile manner in response to the hypothalamus's enhanced pulsatile release of gonadotropin-releasing hormone, or GnRH.
What hormones are present in women?
In order to be sexually active and fertile, three key reproductive hormones—estrogen, testosterone, and progesterone—are required. In addition to other things, they are in charge of sperm production, sex drive, menopause, menstruation, puberty, and pregnancy. In males and females, the testes and ovaries generate these hormones (in males).
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