An example of a land feature formed by river erosion is
a.
alluvial fans
c.
soil
b.
deltas
d.
oxbow lakes


Please select the best answer from the choices provided

A
B
C
D

Answer:

1st. the chromosomes arrive at the cell poles

2nd.  the mitotic spindle disassembles

3rd. the vesicles that contain fragments of the original nuclear membrane assemble around the two sets of chromosomes

Explanation:

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During telophase, separated chromosomes arrive at opposite poles, decondense, and are encased in newly formed nuclear envelopes. Meanwhile, cytokinesis divides the cell's cytoplasm, resulting in the creation of two daughter cells.

During telophase, several critical events ensure the proper conclusion of cell division, whether it be mitosis or meiosis. One key event is the arrival of separated chromosomes at opposite poles of the cell. This repositioning is crucial for the equitable distribution of genetic material to daughter cells. As chromosomes reach these poles, they undergo decondensation, transitioning from tightly coiled chromosomes into a more relaxed chromatin state, making genetic material accessible for gene expression.

Simultaneously, the reconstruction of the nuclear envelope around these dispersed chromatids marks the re-establishment of distinct nuclear territories within the emerging daughter cells. This event is vital for the segregation and protection of the genetic material in preparation for the cell's return to the interphase state, where it resumes normal cellular functions.

In addition to these nuclear events, cytokinesis often commences during or shortly after telophase, culminating in the physical division of the cell's cytoplasm into two separate daughter cells. This process varies between organisms and cell types, with animal cells forming a cleavage furrow through the constriction of an actin ring, and plant cells forming a cell plate that will eventually develop into separate cell walls.

The element found in both DNA and protein is nitrogen.

Explanation:

Answer:

Nitrogen

Explanation:

A statement of purpose in an experiment should explicitly outline what is to be accomplished during the experiment and the methods of data analysis.

The statement of purpose for an experiment designed to test a hypothesis should clearly define the objectives of the laboratory procedure and the subsequent statistical analysis. An example could be 'Perform an experiment that evaluates the impact of microwave power level and heating time on the temperature of water'. However, it must also encompass the analysis component, such as 'Then, compare the experimental value of 50% power to 100% power using a t-test at both 8 and 10 min to determine if the power level significantly impacts water temperature'.

The overarching goal of experimental science is to rigorously test the hypothesis, usually with an intention to disprove it, thereby enhancing the hypothesis's validity if it withstands the testing. This scientific process involves careful experimental design, including considerations for randomization, replication, and control of extraneous variables, precise data measurement, and meticulous experimentation to successfully achieve the objectives and draw reliable conclusions.

Experiments attempt to produce other observations that support or refute a theory or hypothesis. Hence the correct option is b.

The purpose of performing experiments is to test theories or hypotheses by generating empirical evidence that either supports or refutes them. Through experiments, scientists systematically manipulate variables and observe the outcomes to understand the underlying mechanisms or relationships between phenomena.

Experimentation allows researchers to gather data in a controlled setting, enabling them to draw conclusions about the validity of their hypotheses. By comparing the observed results with the predictions made by the theory or hypothesis, scientists can evaluate the accuracy and applicability of existing scientific models. Therefore, experiments serve as a crucial methodological tool in the scientific process, facilitating the advancement of knowledge and understanding in various fields of study. Hence the correct option is b.

Complete question:

Which of the following statements best describes the purpose of performing experiments? OA. Experiments are designed to produce unexplainable results. B. Experiments attempt to produce other observations that support or refute a theory or hypothesis. OC. None of the answers are correct. O D. Experiments can be replaced by logical reasoning based on the known facts. OE. Experiments are designed to produce the results predicted by a theory or hypothesis.

The Axial portion refers to the central part of the body, encompassing the head, neck, and trunk. It houses vital organs like the brain, heart, and lungs. It's pivotal in studying human anatomy, particularly in biology or health sciences.

The Axial portion is a term used in anatomy and refers to the central part of the body, including the head, neck and trunk. It's essentially the main part of the body that houses critical organs such as the brain, heart, and lungs, among other components. It's often contrasted with the appendicular portion, which includes the appendages (limbs).

Understanding the axial portion of the body can be crucial for studying the human body, especially in terms of biology or health sciences. It allows you to easily locate specific organs and structures within the body, enhancing your understanding of bodily functions and processes.

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Answer:

The model of water from paper clips can be made as follows:

1) As a water molecule has a single atom of hydrogen, we can place the single green paper clip in the center. This green paper clip will depict a hydrogen atom.

2) As two oxygen atoms are present in a molecule of water we can place each of the two yellow paper clips at the sides of the green paper clip. These yellow paper clips will depict the oxygen atoms.

Answer:

The answer is B. Weather

Final answer:

Meteorologists primarily study b) Weather, focusing on atmospheric phenomena and weather patterns, unlike geologists or paleontologists who study rocks and fossils respectively.

Explanation:

Meteorologists mostly study B. Weather. Although climate and geological events like volcanic eruptions can impact weather patterns, the primary focus of meteorology is the atmosphere and its phenomena, including wind, rain, storms, and temperature variations. Rocks, on the other hand, are generally studied by geologists; volcanoes are a part of both geology and volcanology; and fossils are within the realm of paleontology.

Answer:

8. D

9. A

10. A

11. C

12. D

Explanation:

8. Natural selection works on variation that exists in the genes of organisms. Antelopes who have genetic variation that makes their legs more muscular are at an advantage because they can outrun predators. This increases the chance that they will reach reproductive age, and be able to pass this advantageous trait onto their offspring. Over time, this selection pressure makes the variant more common in a population.

9. Beneficial traits are those that give a selective advantage. This could be one that helps it outrun predators (like above), avoid illness and death, gives it a reproductive advantage (i.e. more attractive to mates), or makes it better able to digest certain foods, for example. The formation of cancer cells would be harmful for an organism, reducing its fitness and perhaps leading to death. The inability to reproduce would mean genetic info is not passed on to the next generation, and stopping the production of an essential protein would likely lead to death. However, resistance to a virus would help an organism avoid illness and death, improving fitness.

10. Genotypes are what organisms inherit from their parents, i.e. the genetic information that is passed on. However, the way in which different alleles interact and are expressed is the phenotype. If we take the above example, natural selection is acting on the phenotype of muscular legs. If an antelope had the muscular leg genotype but for some reason it was not being expressed (maybe another gene is interfering with it), then the antelope would not have a selective advantage, and natural selection could not be act on the trait.

11. A trait that better suits an organism to its environment will be selected for by natural selection. This is because that organism is more likely to survive due to the trait, giving it a selective advantage. Therefore, if a mutation arose making the giraffe more adapted to the environment, it would be positively selected for, and through evolution would become more common.

12. This is an example of selective breeding, which has been happening for generations. Farmers spot desirable traits, and cross horses with these traits in an attempt to enhance the trait or to ensure it is passed on to the next generation. This is not natural selection, because farmers are making it happen artificially. It is not cloning or recombinant DNA, which are terms scientists use for actually manipulating the DNA in the lab.

Charles Lyell's principle that the age of earth may be much older than once thought impressed upon Darwin.

Explanation:

Charles Lyell is one among the earlier thinkers whose studies influenced Darwin and he lived in the 1797-1875 period. while on his voyage in Beagle Darwin took the book of Charles Lyell, Principles of Geology with him.

In this book Lyell argues that the earth's surface was formed as a result of gradual geological processes indicating that the earth was much older than what many believed at that time.

Answer:

4,2,1,3,5

Explanation:

I believe this is right

Answer:

Explanation:

5,3,4,1,2

Answer:

A mature animal will  have been fully developed whereas an immature animal will not be fully developed. In a mature animal, all stages of development will have occurred whereas in an immature animal not all developmental stages would have occurred.

A mature animal will be better adapted to live in an environment as compared to an immature animal.

Mature animals have reached reproductive age, can survive independently, and have learned behaviors that aid their survival, while immature animals are still developing physically and behaviorally, and depend on parental care.

Difference Between Mature and Immature Animals

The terms mature and immature refer to distinct life stages in the development of animals. A mature animal has reached a stage where it can reproduce and has developed sufficient physical and behavioral characteristics to survive independently in the wild. On the other hand, an immature animal is still in the process of growth and development, and typically relies on parental care. Immature animals may not yet have the full capability to survive on their own and have not reached sexual maturity. For example, in mammals, this period of immaturity is longer as compared to other animals, involving learning social and physical environmental aspects.

Mature animals often have advantages over immature ones, including better survival skills learned through experience, which in the evolutionary context, means that they are more successful in propagating their genes. Furthermore, mating rituals and societal behaviors may favor the reproductive success of mature animals over their younger counterparts.

These differences can be crucial, particularly in species that nurture their offspring over a significant period, as investment in the development of an immature animal is substantial. Thus, the distinction between mature and immature animals is not only based on physical maturity but also includes learned behaviors and the ability to successfully interact with their environment.

Red-green color blindness is an X-linked trait.  

Explanation:

A red-green color blindness is a hereditary disease which occurs with inheritance of recessive X linked chromosomes, which depicts that the gene or allele causing this defect is presents on the X chromosome.

Since males can express the recessive gene with one copy of the X chromosomes, this defect is more common among men than women.

So even if a grandfather has this defect, this may get inherited by his grandson, while his mother might just be a carrier.

This is the reason why the baby boy inherited the red-green blindness from his father.

The allele combinations resulting in a person having dimples, a dominant trait, can be either DD (homozygous dominant) or Dd (heterozygous). The individual will not have dimples if they have two recessive alleles (dd).

In genetics, dominant traits are those that are expressed or visible when inherited. In your question, having dimples is a dominant trait and is represented by the letter D. The presence of at least one 'D' in the allele combinations will result in having dimples. Therefore, the correct answer is DD, Dd. This means individuals with homozygous dominant (two same dominant alleles like DD) or heterozygous (one dominant and one recessive allele like Dd) will have dimples. The only combination that does not produce dimples is when you have two recessive alleles (dd).

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Answer: 2.)One start codon and one stop codon are used for its synthesis.

3.)The piece of genetic code used for its production contains 11 codons.

Explanation: Codons are a piece of genetic materia made up of three nucleotides which codes for a specific amino acid. During protein synthesis, one start codon signals the initiation of protein synthesis while one stop codon signals the termination of protein synthesis. The start codon codes for methionine while the stop codon codes for no amino acid. A protein whose genetic sequence has 11 codons is synthesized using a piece of genetic code with 11 codons. There are generally 64 codons. One of which is the start codon while three of which are stop codons. The start codon is AUG while the stop codons are UAA, UAG and UGA.

Only statement 2 is correct; it states that one start codon and one stop codon are used for the protein's synthesis. The start codon codes for methionine, and the stop codons do not code for any amino acid.

To determine which statements are true for a protein whose genetic sequence has 11 codons, let's analyze each option:

Only the statement that one start codon and one stop codon are used for its synthesis is correct. The start codon AUG initiates protein synthesis, while a stop codon terminates it.

Answer:

Replicating an experiment _____.

A. increases validity

B. decreases validity

C. has no effect on validity

Answer:

1. Amber is made from tree resin.

2. All of the above

3. When a insect gets stuck in tree resin, the insect eventually becomes covered with the sticky resin. After millions of years, the resin hardens and becomes ember.

Answer:

Which is a physical property?

Physical property include reactivity

Explanation:

Reactivity entails the reaction when compounds mix with each other, such reaction might be noticed by change in color, loss of water, among others

Answer:

Deoxyribose sugar and phosphate groups

Explanation:

The Deoxyribose and phosphate groups are held together by hydrogen bonds. The Deoxyribose is also connected to the nucleic acids, making a complete nucleotide. Deoxyribose is only used in DNA, because DNA means Deoxyribonucleic Acid. RNA is made with a sugar called Ribose.

The two molecules that forms the backbone of DNA ladder are:

1. Deoxyribose

2. Phosphate groups

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"Directional selection" will most likely occur.

Answer: Option B

Explanation:

Directional selection or positive selection is an organic selection mechanism in population genetics, this scrutiny is an intense phenotype is preferred over certain phenotypes, allowing the intensity of the allele to migrate over moment towards that phenotype.

For an instance directional selection are fossil statistics showing that the scale of black bears in Europe diminished throughout ice ages interglacial phases however grew at each glacial period. A further example is the scale of the beak in a finch group.

Directional selection is the type of selection that will most likely occur when larger squirrels outcompete smaller ones for acorns, as it favors one extreme of a trait.

In the scenario where larger squirrels can carry larger acorns and they outcompete smaller squirrels when acorn supplies are limited, the type of selection that will most likely occur is directional selection. This is because directional selection occurs when natural selection favors one extreme of a trait, leading to a change in the phenotype frequency over time. In this case, the trait for larger size is advantageous due to the competitive advantage it provides in accessing food resources.

Answer:

action force. The push of the first object on the 2nd object. friction. A force that opposes the motion of an object.

Explanation:

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The annual high temperature in Cape Hatteras, North Carolina, is higher than the annual high temperature in Monterey, California, because a warm water surface current flows along the east coast of the United States, which is in Option a.

It has many implications, such as the fact that warm water plays a critical role in the ocean's circulation patterns, which have a significant impact on marine life, and that warm water leads to sea-level rise and has a significant impact on coastal communities.

Hence, the annual high temperature in Cape Hatteras, North Carolina, is higher than the annual high temperature in Monterey, California, because a warm water surface current flows along the east coast of the United States, which is in Option a.

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D.

Water passing into an animal cell causing it to swell is NOT an example of the maintenance of homeostasis in an organism.

To make this homeostatic, the cell has to regulate the water by eliminating excess water probably via vacuoles. This way, the cell would not swell.

Explanation:

Homeostasis means the maintenance of steady conditions in the body for the proper functioning of tissues. Homeostasis is governed by positive and negative feedback mechanisms that act in antagonisms in a steady balance to maintain the right parameters. An example is the way glucagon and insulin hormones work antagonistically to maintain the right blood sugar levels at all times even after satiation and in starvation.

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Answer: it B for sure

Explanation: you grow because your cells divide

Answer:

your cells divide produceing new cells you get new cells everyday sence you ever exsisted

Explanation:

The enzyme DNA polymerase play in transcription, related to the promoter and terminator sequences on DNA is It knows where to begin transcribing and where to stop.

The correct option is (B).

DNA polymerase is not directly involved in transcription. Instead, it is primarily involved in DNA replication, where it synthesizes a new strand of DNA using a template DNA strand. Transcription, on the other hand, is the process of synthesizing RNA from a DNA template.

During transcription, RNA polymerase is the enzyme responsible for synthesizing RNA from a DNA template. However, DNA polymerase indirectly influences transcription through its interaction with promoter and terminator sequences on DNA.

1. Promoter sequences: DNA polymerase does not directly recognize promoter sequences. Instead, RNA polymerase binds to the promoter region of DNA to initiate transcription. Promoter sequences provide the necessary signals and binding sites for RNA polymerase to recognize and bind to the DNA template, initiating the transcription process. Therefore, DNA polymerase's role in transcription related to promoter sequences is indirect.

2. Terminator sequences: Similarly, DNA polymerase does not directly recognize terminator sequences. Once RNA polymerase reaches the terminator sequence on the DNA template during transcription, it signals the termination of transcription, and the newly synthesized RNA molecule is released. Terminator sequences provide the signal for RNA polymerase to terminate transcription and release the RNA transcript. Again, DNA polymerase's role in transcription related to terminator sequences is indirect.

In summary, while DNA polymerase is not directly involved in transcription, its role indirectly influences transcription through the maintenance of the DNA template and its interaction with promoter and terminator sequences. DNA polymerase ensures the integrity and fidelity of the DNA template, which is essential for the accurate initiation and termination of transcription by RNA polymerase at promoter and terminator sequences, respectively. Therefore, option B is the most accurate description of DNA polymerase's role in transcription related to promoter and terminator sequences on DNA.

Answer:

B

Explanation:

The soap brands cultivated less bacteria culture than the warm water and hand sanitizer.

Hand sanitizer is more effective than soap in killing bacteria.

therefore correct option (D).

The valid conclusion to draw from this data is that hand sanitizer is more effective than soap in killing bacteria. The experiment compared the effectiveness of hand sanitizer and soap in killing bacteria by swabbing the hands of students after washing and applying it to a culture plate. The bacterial cultures were then counted and recorded. The results showed that hand sanitizer was more effective than soap in killing bacteria.

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Answer: two genes are equally dominant.

Explanation: codominance is a phenomenon in which two genes are able to express themselves phenotypically in an equal proportion in an organism. For instance, a gene for black fur (B) in cattle is dominant and the gene for white fur (W) is also dominant, a cattle that inherited the two genes will have black and white fur mixed together in equal proportion. This is known as codominance.

its d cuz it has to be like Rr or Ss or something like that for it to be co

because R or S is dominate over r or s so it cant be equal domnites or recessive above me is wrong he lies why do you think its called Co dominates oof cant spell

Explanation:

The independent variable in this experiment is the temperature, as it is the factor being changed to observe its effect on the rate at which bread turns moldy, which is the dependent variable.

In the described scenario, the independent variable is the factor that is changed or controlled to test the effects on the dependent variable, which is the rate at which bread turns moldy. The hypothesis provided states, "Bread turns moldy faster at higher temperatures," which predicts the outcome based on changes made to the independent variable. Therefore, the independent variable is temperature.

During the investigation, it is essential to keep other factors constant, such as the type of bread, the amount of moisture, and exposure to air, among others, so that they do not affect the outcome and interfere with the validity of the experiment.

Answer:

D

Explanation:

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

Answer: It is D carbon dioxide, or dry ice; sublimation.

Answer:

Solar energy is a form of smart energy that can be used to heat water for homes.

Explanation:

Solar radiation, as it's well known, is capable of providing light and heat to the planet. The characteristics of the energy provided by the sun make it possible the use as an accessible, clean and cheap energy source.  

Solar energy has properties that make it a form of smart energy:

Solar panels are devices that have been designed to capture energy from the sun and turn it into a source of energy for households. When talking about smart energy, solar energy represents a useful alternative for home use, including the action of heating water.

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Final answer:

Solar energy can be used to heat water for homes through various methods such as photovoltaic panels. It is a form of "smart" energy and renewable and sustainable source of energy.

Explanation:

Solar energy is a form of energy that can be used to heat water for homes. It can provide direct heat or make electricity via photovoltaic (PV) panels or in a utility-scale solar thermal installation.

Other forms of energy commonly encountered include electric energy, chemical energy, radiant energy, nuclear energy, and thermal energy.

Scientists and engineers have developed various ways to harness energy from the sun, such as using solar cells to directly convert sunlight into electricity.