Answer the questions about the diagram above depicting early embryonic events.
1. What is happening at event A?
2. What is the cell resulting from event A?
3. What is happening at process B?
4. What embryonic structure is forming at B1?
5. What is the completed process happening at C?

Answer:

three or four

Explanation:

if you think about it parent with both blu eyed doesn't exactly mean that because of that all their children will have blue eyes...

three out of six of them will have it the remaining four will probably have light or dark brown

All children of two blue-eyed parents will have blue eyes because both parents only carry the recessive allele responsible for blue eyes, resulting in a genotype of bb for each child.

In humans, the gene for brown eyes takes precedence over the gene for blue eyes, which is recessive. If two blue-eyed parents have six children, everyone of them will have blue eyes. This is because blue-eyed parents only carry the recessive allele for eye color, denoted as 'b'.

Thus, both the mother and father have the genotype bb. Because each parent can only pass on one 'b' gene, all offspring will have the bb genotype, resulting in a phenotype with blue eyes. This is consistent with Mendelian genetics principles, which state that in order for a child to have brown eyes, one of their parents must possess and pass down a dominant 'B' allele.

Answer:

Answered below

Explanation:

A codon is a sequence of nucleotide triplets of messenger ribonucleic acids, or deoxyribonucleic acid. The start codon is defined as the first codon of a messenger ribonucleic acid transcript that is being translated by the ribosomes.

The ability to initiate the right AUG codon determines the correctness of translation. In eukaryotes, this is accomplished by scanning mechanism. In the scanning mechanism, the ribosomal subunit attached to the five prime end of the messenger ribonucleic acid and inspects base to base for an AUG using complementarity with the anticodon of methionyl indicator transfer RNA as the key to identifying AUG.

The start codon always code for a modified methionine in bacteria and codes for methionine in eukaryotes. Alternate start codons are found in bacteria and eukaryotes . They are different from standard AUG codon and are initiated by a separate transfer ribonucleic acid. They are rare in eukaryotes but common in bacteria.

Answer:

The method of identifying the correct codon for transcription is by means of the control STOP codons, which are those that face point mutations of the second, third or first position (the third position is the most imperceptible and usually goes unnoticed) they generate a STOP or stop of the process, causing a premature termination of the translation which causes an incomplete protein to be translated and, in most cases, not functional ... There are also start codons that are those that are in charge of start said process.

The start codon is not only a signal to start the translation, but it is translated effectively, so that, at least before their proteolytic processing, all eukaryotic proteins have a methionine at their amino terminus, which is the amino acid corresponding to the codon according to the genetic code. In prokaryotes, said methionine is modified as N-formylmethionine. This does not mean that all the components of the proteome possess said methionine at its end, since it is common for it to be enzymatically cleaved

Explanation:

Although AUG is the most widely used start codon in eukaryotes, there are other codons that are also valid as the start of translation. Such exceptions are much more common in prokaryotes, where GUG and UUG can be used as alternative translation start codons. For example, Escherichia coli, a bacterium in the Enterobacteriaceae family, uses ATG (AUG in RNA) in 83% of cases, GTG in 14% (GUG in the transcript) and TTG in 3% (UUG in RNA) and still someone else.

Gene flow is the transfer of genetic information between populations through breeding, leading to the exchange of genes and introduction of new genetic variation.

Genetic flow, or gene flow, is the transfer of genetic information from one population to another. This process occurs when populations of the same species breed with one another, leading to an exchange of genes across population boundaries. In essence, gene flow is the migration of alleles or genes due to the movement of individuals or gametes (e.g., pollen, seeds) between populations.

An example of gene flow is when plants from one population send their pollen via wind, insects, or birds to another population, leading to cross-pollination and the introduction of new genetic material. Similarly, when male lions leave their pride to join another, they bring new genetic variation to that group. Thus, gene flow can introduce new genetic variation into a population and is considered an important force in evolution.

Answer:

1) Ocean currents can carry warm water, which can raise the temperature of the air and land.

2) Ocean currents can carry cold water, which can cool the air and land.

The effects that ocean currents have on short-term climate change are as follows:

Thus, the correct options for this question are A and B.

Climate change may be characterized as the significant alterations in global temperature, precipitation, wind patterns, and other measures of climate that occur over several decades or longer. It generally involves the long-term shifting of temperature and weather patterns.

Ocean currents act like conveyer belts that particularly transport warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching the Earth's surface.

Therefore, the correct options for this question are A and B.

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Answer:

option d: Proteins that are fully translated in the cytosol do not end up in transport vesicles

Explanation:

in the human body it is very essential that the protein should be moved/directed to different area of the human body and wit this, a lot of proteins of different kinds are sent to various part of the body

proteins translation  in a eukaryotic cell starts  in the cytosol exempted in some few cases.mostly, when protein are  made, it passes a step by step process and at various stages reached, the protein is  usually checked for molecular tags.

The correct answers are: D. Proteins that are fully translated in the cytosol do not end up in transport vesicles, E. Proteins that are fully translated in the cytosol do not end up in the plasma membrane and F. Proteins that are fully translated in the cytosol do not end up in the Golgi apparatus

Analyzing each statement:

Answer:

A neutral.

Explanation:

Mutation: It is defined as any alteration that occurs in the nucleotides sequence of organisms. It can be beneficial, harmful, and neutral.

A neutral mutation: It is defined as the no harmful and no beneficial effect on the survival and reproduction of organisms. Some examples of neutral mutations are humans with webbed toes, frog having an extra leg, and white kermode bear.

Answer:

b

Explanation: It has the least weight/mass (less for gravity to pull on) and is going slow so

Final answer:

A tiny car going extremely slowly has the least momentum because momentum is the product of mass and velocity and both are low in this case.

Explanation:

The question relates to the concept of momentum in physics. Momentum is the product of an object's mass and its velocity. If two objects have the same momentum, the object with the smaller mass must have a higher velocity to compensate. In contrast, if two objects have the same kinetic energy, the one with the smaller mass will have a higher velocity, but not necessarily a higher momentum, since momentum also depends on mass.

Now, considering the options provided:

A larger car going extremely slowly will have more momentum than a tiny car going extremely slowly due to its larger mass.

A tiny car going extremely slowly will have the least momentum since both its mass and velocity are small.

A large car going super fast has a high level of momentum due to its large mass and high velocity.

A tiny car going super fast will have significantly less momentum than the large car at high speed, but more than the same tiny car going slowly.

Therefore, option b. A tiny car going extremely slowly has the least momentum.

Answer:

Cells, tissues, organ, organ systems, organism

Explanation:

All living organisms including Lisa as used in this question is made up of fundamental and basic unit called CELLS.

In multicellular organisms (more than one cell), these cells undergo multiplication by dividing repeatedly and the ones that perform similar functions forms the TISSUE. For example, in humans like Lisa, we have the blood tissue formed by blood cells performing similar functions e.g erythrocytes, leukocytes etc.

The tissues that work together to perform a certain function groups together to form an ORGAN. An organ performs a specific function in the body. Examples of organs in a living organism like Lisa is heart, Kidney, liver etc. These organs, whose, functions are in synchrony collectively forms the ORGAN SYSTEM, which helps maintain the internal environment of an organism. Organ systems include; circulatory system, digestive system etc. Each organ system is made up of certain organs.

The collaboration of many organ systems working together ultimately forms the full ORGANISM like Lisa who is a human.

Answer:

Explanation:

Narrow sense heritability - h​​​​2

​​​​​​selection differential - S

Selection differential is calculated from the difference between the population average and the parental population.

Breeder's equation:

Response to selection - R = h​​​​​​2S

Mean milk production of 10% cows for experiment = 8.9L/hr

Mean milk production of parental population = 5.1L/hr

Selection differential S= 8.9 - 5.1 = 3.8 L/hr

Response to selection = 0.587 × 3.8 = 2.23

A mutation that prevents the expression of aurka in a normal cell would likely disrupt proper mitosis, leading to issues like aneuploidy. This can trigger cell cycle arrest or apoptosis, but may also prevent cancer if other cell cycle checkpoints are functional.

To predict the effect of a mutation that prevents the expression of aurka on a normal cell, we need to consider the role of AURKA (Aurora kinase A) in cell division. AURKA is necessary for proper mitotic progression, including the alignment and separation of chromosomes during metaphase and anaphase. If AURKA expression is inhibited, it would likely lead to problems with mitosis.

AURKA acts as a key regulatory protein during cell division, ensuring that cells correctly duplicate and segregate their chromosomes. Without this regulation, it is possible that cells could undergo faulty cell division, leading to aneuploidy, where cells have an abnormal number of chromosomes. This can cause cell cycle arrest, apoptosis, or potentially lead to tumorigenesis if other checkpoints fail.

However, in a noncancerous cell, the inactivation of AURKA may activate DNA damage responses or cell cycle checkpoints that prevent the cell from dividing, and thereby reduce the risk of cancer development.

Answer:

Option A => Glucose can pass through specific proteins in the cell membrane.

Explanation:

Ok, we are are given the following information or data from the question above that is;

(1). "red blood cells in an isotonic solution."

(2). "Then they add radioactive glucose to the solution."

(3). "They observe that levels of radioactivity increase in the interior of the cell, indicating that the cell has taken up the radioactive glucose from the solution."

Key observation: glucose is able to pass through the cell membranes because of transporters which are known as transmembrane proteins. Glucose in particular is transported through a uniporterin the red blood cells

Answer:

Every gene has a code which is responsible for the formation of thousands of protein necessary for normal functioning of the cell.

Explanation:

In genes codes are present. In these codes have information about the formation of protein. Genes is just like a recipe book which contains information about making different types of protein which is necessary for the cell. So codes in the genes are work according to the instruction of the cell for making a specific protein. These codes contains characters which is sent by the genes to the ribosomes of the cell where protein are formed.

Answer:

Answer:

sunlight and heat: Abiotic

insects: Biotic

rotting log: Biotic

bacteria: Biotic

water: Abiotic

rocks: Abiotic

Explanation:

Explanation:

The categories of biotic or abiotic things are:

Sunlight and heat:

Insects: biotic factor

Rotting log: biotic factor

Bacteria: biotic factor

Water: abiotic factor

Rocks: abiotic factor

Biotic factors are those that are living, growing, and reproducing. These are plants, animals, fungi, etc.

Abiotic factors are those which are nonliving. Like a rock, or water.

Thus, the categories are:

Sunlight and heat: abiotic factor

Insects: biotic factor

Rotting log: biotic factor

Bacteria: biotic factor

Water: abiotic factor

Rocks: abiotic factor

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Answer: wegener’s theory of continental drift; hess proposed the idea that mid ocean ridges are where crust is created

Explanation:

Answer:

wegener’s theory of continental drift; hess proposed the idea that mid ocean ridges are where crust is created

Answer:

Answer:

Vectors-These are diseases transmission which involves the piercing of the skin-vectors penetration  e.g by mosquito. ticks.

Air borne which involves entry through the nasal passages, mouth, eyes to reach the body  the respiratory tracts and the blood.

Blood borne diseases are  transmitted from e.g piercing of the skin by  contaminated objects needles, broken glass. If there is an opening in the skin these transmission is also possible.

Sexual can be transmitted through open sores at the genitals.or  use of  contaminated needle by infected subject. Sores in the mouth during kissing may be another route

food borne or water borne needs to enter through natural opening of the mouth to reach the body fluids and the blood through the GIT.

Contact diseases does not necessarily need a direct opening for transmission . rather there should be a direct contact between the infected individual and the other. Sometimes a direct contact between the two is not need. e.g common cold, chicken pox , influenza , etc.  

Explanation:

The given question is incomplete. The complete question is:

Which statements describe transform boundaries? Select two options.

Rift valleys are formed.

Mountains are created.

Faults form in the lithosphere.

Plates move toward each other.

Plates slide in opposite directlồns.

Answer:

The correct options are that formation of faults takes place in the lithosphere and the sliding of the plates takes place in the opposite direction.

Explanation:

The transform boundaries signify towards the site where sliding of the plates takes place past each other, it is also called transform plate boundaries. In the process of the formation of the transform boundaries, neither the formation nor the destruction of the lithosphere takes place, however, in the process formation of thin rift valleys occurs.  

The majority of the formation of the transform boundaries are witnessed on the floor of the sea. These boundaries possess the tendency of giving rise to earthquakes of high intensity that imparts a deleterious influence on the ecosystem. California's San Andrea is an illustration of transform boundaries.  

Answer:

Rift valleys are formed, and mountains are created.

Explanation:

Answer: The density of the ice cream and buoyant.

Explanation:

The density of the ice cream plus buoyant will cause the carbonation in root bear will cause gravity to push down on the ice cream and buoyant pushes the ice cream upwards, the ice cream floats because the buoyant force is greater than the weight of the ice cream.

Answer: The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward. The ice cream floats because the buoyant force is greater than the weight of the ice cream.

Answer: B. ZBP1 (zip code binding protein)

Explanation:

ZBP1 is necessary for the prevention of premature translation, this protein is responsible for the transcription of beta-actin in the nucleus, since it is mutated, the effects will be observed because there will be no movement of fibroblasts to the infection site

the CPEB is false because it has the function of regulating the translation of mRNA, the SCR is not correct because its main role is the activation of protein kinases, thus also ruling out the general transcription factor which is It is responsible for the initiation of transcription in eukaryotes and poly A polymerase is also ruled out because its function is found in the production of poly A tail.

Answer:

The central principle of Darwin theory is based on the fact that,

He observed that  in a given population,organism usually produced more offspring  than than they can naturally capable of taken care of to replace the parents population.And this leads to increase in large population.

Despite this large population the natural population  remain stable over a long period of time.

Because in  this population organisms compete for needed resources for survival, thus certain organisms with special characteristics or traits were able to  for survive better, and therefore get the natural resources, and resist the selection pressure while others which can not, will be removed from the population. Hence there is competitions for the natural resources,

Therefore organisms  that survived were better adapted, because they must have inherited the  survival traits or genes from their parents. This surviving traits is caused by  variation.And is is responsible for their  better adaptation  and survival in the population.

A s this continues the population of the survived organisms will dominates,This is because these organism are  naturally selected by nature,  and able to resist  the  selection pressure.

They are known as the survival of the fittest, and their selection advantages due to variation (caused be mutation) is responsible for their dominating population and natural selection compare to the less selected ones.

Explanation:

Frozen pipes are a significant issue in cold countries due to the expansion of water upon freezing, which can lead to pipe breakage and interruption of water flow, along with other challenges arising from thermal expansion in various materials and systems.

Frozen pipes are a problem in very cold countries because of the expansion of water when it freezes. This expansion can cause pipes to break, leading to leaks and potentially significant damage when they thaw. Additionally, the ice inhibits water flow within the pipes, preventing the transport of water for use.

As water freezes, it expands by approximately 9%, and since water is incompressible, this puts tremendous pressure on the pipes from the inside. If the pipes are not built to withstand this pressure, they may burst. This phenomenon is not only limited to pipes but can also affect other systems where thermal expansion plays a role, such as the buckling of roadways or the snapping of power lines in varying temperatures.

Moreover, biological systems are also affected. For example, vessel cavitation can occur when ice forms in plant xylem, introducing air bubbles that disrupt water transport when the ice melts, affecting plant health. Similar principles apply to the damage seen in frozen foods and the expansion concerns in mechanical and structural engineering.

Answer:

B is your answer!

Explanation:

Answer:

I know it is B or C

Explanation:

Answer:

See the answer below

Explanation:

From the illustration, maroon-like mutant strain is represented by the allele m and it is X-linked. Homozygous females ([tex]X^mX^m[/tex]) and hemizygous males ([tex]X^mY[/tex]) have the maroon trait and are mutants.

A reciprocal cross is made against the wild type. The wild type would be homozygous for the alternate from of the gene in females and hemizygous for alternate form of the gene in males.

Crossing a wild type female with a mutant male (first half);

[tex]X^MX^M[/tex]   x   [tex]X^mY[/tex]

Progeny = [tex]X^MX^m, X^MX^m, X^MY, X^MY[/tex]

Genotypic ratio: 1 [tex]X^MXm[/tex] : 1 [tex]X^MY[/tex]

Phenotypic ratio: All wild type

Crossing a mutant female with a wild type male (second half);

[tex]X^mX^m[/tex]   x   [tex]X^MY[/tex]

Progeny = [tex]X^MX^m, X^MX^m, X^mY, X^mY[/tex]

Genotypic ratio: 1 [tex]X^MX^m[/tex] : 1 [tex]X^mY[/tex]

Phenotypic ration: 1 wild type : 1 mutant

Reciprocal crosses between maroon-like mutants and wild type flies will result in different patterns of inheritance for males and females, demonstrating that the maroon-like trait is X-linked.

To prove that the “maroon-like” trait is X-linked, you would set up reciprocal crosses with wild type specimens. In the first cross, if a maroon-eyed male (XmY) is mated with a wild type female (X+X+), all female offspring will have wild type eyes (XmX+) and all male offspring will have maroon eyes (XmY) due to the Xm from their father and the Y from their mother. In the reciprocal cross, if a maroon-eyed female (XmXm) is mated with a wild type male (X+Y), all female offspring will be carriers (XmX+) and all male offspring will have wild type eyes (X+Y) because they can only inherit the Xm from their mother and the Y from their father. Hence, the phenotypic frequencies will show 100% maroon-eyed males and wild type females in the first cross, and 100% wild type males and carrier females in the reciprocal cross.

Answer:

By inhibiting pyruvate kinase in the liver isoenzyme, the muscle will initiate the lactic acid fermentation process that will provide NAD to allow glycolysis

Final answer:

The effect of cAMP-dependent protein kinase A (PKA) inactivating the liver isozyme but not the muscle isozyme of pyruvate kinase is to conserve blood glucose levels during fasting by inhibiting liver glycolysis, while muscle glycolysis continues to function normally.

Explanation:

Pyruvate kinase is an enzyme crucial for the last step of glycolysis, facilitating the conversion of phosphoenolpyruvate (PEP) to pyruvate and producing ATP in the process. The isozyme found in the liver, known as L-PK, can be inactivated by PKA which is triggered by hormones like glucagon, signifying a state of fasting. This downregulation ensures that when energy or glucose is scarce, the liver conserves glucose and releases it into the bloodstream rather than using it for glycolysis internally. In contrast, muscle pyruvate kinase is not affected by PKA, allowing glycolysis to proceed in the muscles even during fasting.

While ATP serves as a negative allosteric regulator for both muscle and liver isozymes, reflecting a condition of high energy within the cell, the liver isozyme is regulated additionally through hormonal signals, coupling the body's metabolic state with the enzyme's activity. Dephosphorylation of the liver isozyme by phosphatase reactivates the enzyme, which is promoted by insulin after a carbohydrate-rich meal, signifying an ample glucose supply and energy abundance.

Answer:

The answer is B, DNA fingerprinting can be used to identify persons that were wrongly convicted of a crime.

D. DNA fingerprinting can be used to identify persons that were wrongly convicted of a crime.

DNA fingerprinting is a method of analyzing the unique genetic makeup of an individual. This technology is commonly used in forensic science, criminal investigations, and paternity testing. The DNA fingerprint is created by analyzing specific regions of a person's DNA, known as markers.

These markers are then compared with the DNA of other individuals to determine whether they match or not. DNA fingerprinting provides highly accurate results, as each person's DNA is unique, except in the case of identical twins.

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Answer:

1. genetic drift; 2. natural selection; 3. gene flow; 4. natural selection

Explanation:

1. A fish net captures twenty fish, all who happened to have large spots:

The mechanism of evolution that is playing out in this situation is most likely genetic drift. Genetic drift occurs  when a random change occurs, resulting in the selection of a number of individuals by chance, rather than based on their level of fitness. The fish with large spots allele were selected against by chance, not necessarily because the fish with the small spot alleles were better fitted.

2. Small spotted fish escape from predators better:

The situation here is natural selection. The small spotted fish possess a greater fitness as they become well adapted to escaping from predators better than the large spotted fish, which gives confers on them a greater fitness to be selected for against the large spotted fish.

3. 15 large spotted fish move into this population:

The movement or introduction of new individuals i nto a population is what is referred to as gene flow in evolution, which is another mechanism of evolution that changes the allele frequency of the original population.

4. Fish-eating birds catch large spotted fish more easily:

This is another example of natural selection. The small spotted fish possess a greater fitness which makes them not easily preyed upon by Fish-eating bird easily, compared to large spotted fish. Natural selection favors the fish with small spotted alleles against the large spotted fish, and as a result, more small spotted fish would survive and reproduce more offspring with the small spotted alleles compared to those with large spotted alleles.

Answer:

The type of cell division, meiosis, ensures. Meiosis also allows genetic variation through a process of DNA shuffling while the cells are dividing.

Explanation:

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To identify dividing cells under a microscope, look for physical characteristics such as visible chromosomes during mitosis and the appearance of an actin ring or cell plate during cytokinesis. Scientists may use fluorescent dyes and certain types of microscopes to better visualize these processes.

When observing a cell under a microscope, you can recognize cells that are dividing by certain physical characteristics that happen in the stages of cell division. The crucial stage you can observe under a microscope is mitosis. During mitosis, the cell's chromosomes become condensed and highly visible. For example, in the anaphase of mitosis, microscopic images or micrographs show the cell's chromosomes being pulled apart by mitotic spindles.

Another distinguishing feature can be noticed after mitosis, in cytokinesis. In cytokinesis, where the cell splits into two daughter cells, you can see in animal cells a structure called an actin ring which aids in the division, while in plant cell, the cell plate appears which later develops into a cell wall.

Scientists often use fluorescent dyes and light microscopes to highlight these structures, which can make identifying dividing cells easier. The type of microscope used can greatly impact the clarity of these images, with tools like differential interference contrast (DIC) microscopes offering enhanced contrast for better visibility of the cell structure.

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Answer: True         You're Welcome

Explanation: Because when I looked the question up on google it said stem cells can turn into nerve cells.

Answer:

27%

Explanation:

Answer:

Symbiotic relationship

Explanation:

The relationship between the manta ray and the sturgeon fish is a symbiotic relationship. It is also known as mutualism. It involves two organisms benefiting from each other. The two creatures gain something from each other.

The manta ray is cleansed of the dead skin cells and parasites by the sturgeon fish while Sturgeon fish gains a food source from the the manta ray.

Answer:

Yes, if the mother swan pushes a third  baby swan in front of her, work being done  on the third baby.

Explanation:

Work is defined as the displacement covers by the body in the direction of the applied force. Work will be done on the body if a person pulls or pushes the other body or object. So according to the definition of work, if the mother swan pushes the third baby and the baby covers some distance away from the mother swan so we can say that work being done on the third baby.

Final answer:

Yes, work is being done on the third baby swan if the mother swan pushes it and it moves in the direction of the force according to the work-energy principle and Newton's third law of motion.

Explanation:

If the mother swan pushes a third baby swan in front of her, work is being done on the third baby swan. In physics, work is defined as a force causing the movement—or displacement—of an object.

In the case of the mother swan, if she exerts a force on the third baby swan and the baby swan moves in the direction of the force, then according to the work-energy principle, work is being done on the baby swan.

Similar to how a swimmer doing the breaststroke pushes backward against the water and the water pushes the swimmer forward (as per Newton's third law of motion), the force exerted by the mother swan on the baby causes a displacement in the baby swan. So if the baby swan is moved forward by the push, then the mother is indeed doing work on it.