The modern model of atom is unable to show the speed of atoms which make it less sure about its improved version.
Explanation:
The atomic model has under-went a drastic change in the past few decades. The first model was developed by Demoncritus in 450 B.C. which was accurate about the existence of atom as matter particles but he was inaccurate about the divisibility of matters.
Many other scientists have developed various models of atom over time, they are- John Dalton(1800), J.J. Thompson(1897), Ernest Rutherford( 1899), Neils Bohr. Neils Borh talked about the nucleus in his model and about the electrons orbiting the nucleus. However, this modern model lacked the observation of the speed of electrons.
Answer:
The modern model of atom is unable to show the speed of atoms which make it less sure about its improved version.
Explanation:
3. A student performed an experiment to demonstrate that a plant needs chlorophyll for
photosynthesis. He used plants that had green leaves with white areas. After exposing
the plants to sunlight, he tested each leaf for the presence of starch. Starch was found in
the area of the leaf that was green, and no starch was found in the area of the leaf that
was white. He concluded that chlorophyll is necessary for photosynthesis. Which
statement represents an assumption the student had to make in order to draw this
conclusion
a) Starch is synthesized from the glucose produced in the green areas of the leaf.
b) Starch is converted to chlorophyll in the green areas of the leaf.
The white areas of the leaf do not have cells.
d The green areas of the leaf are heterotrophic.
Answer:Starch is synthesized from the glucose produced in the green areas of the leaf.
Explanation:
PLEASE HELP!!!! 30 points for answering!!!!
1. How can researchers be sure they found PFC Gordon’s body?
2. Does Hyman’s team have the ability to do this same procedure with other unidentified soldiers and if so, what would they need to move forward?
Answer:
1. DNA verification.
2. Yes.
Explanation:
1. DNA is what makes any body who he is. These are the set of instructions given to any one by their father and mother. So the researchers processed the remains of those soldiers who were all buried, during the battle of Falaise Gap when Gordon's car was hit by German shell, and found that one of the body's remains were exactly match with Dordon's relation DNA.
2. Hyman's team have the ability to do this same procedure with other unidentified soldiers as long as any relatives in relation to those soldiers are available to verify the DNA samples from.
What adaptation of a bird skeletal system allows for it to be light enough to fly
A student conducts an experiment to see how music affects plant growth. The student obtains four identical plants. Each one is potted in the same type of soil and receives the
same amount of sunlight and water each day. Plant A listens to classical music for three hours each day. Plant B listens to rock music for three hours each day. Plant C listens to
country music for three hours each day. Plant D does not listen to any music at all.
2. Based on the experiment in the scenario, which visual aid would be most helpful in showing the change in the plants' heights over time?
A. A line graph
B.A timeline
C. A bar graph
D. A pie chart
A line graph would more helpful showing the growth of the four plants over time. In the Y axis the height could be shown versus the time in the X axis.
Where do the end products of the light reactions travel too?
Answer:
There are two end products of the light reaction of photosynthesis, ATP and NADPH. These molecules are produced during the cyclic and the non-cyclic photophosphorylation reactions. These are the products which are used in the dark reactions.
The ATP and NADPH produced in the light reactions of photosynthesis are transported to the stroma of the chloroplast, where they are used in the Calvin cycle.
The end products of the light reactions of photosynthesis, which are ATP and NADPH, travel to the stroma of the chloroplast. Here, they are utilized in the Calvin cycle to synthesize organic molecules like glucose from carbon dioxide. The light reactions occur within the thylakoid membranes, where photon energy is harnessed to split water molecules, producing electrons, protons, and oxygen. The electrons move through an electron transport chain, resulting in the generation of ATP and NADPH. During this process, hydrogen ions (H+) are pumped into the thylakoid lumen, creating a proton gradient that powers ATP synthase for ATP production.
4. Name two nineteenth century scientists-one who developed the laboratory burner
in common use today, and the other who studied the spectra of colored flames
produced by a variety of elements,
Answer:
common use today, and the other who studied the spectra of colored flames produced by a variety of elements. The two scientists are Robert Bunsen, whose name is associated with today's laboratory burner, and William Kirchhoff, who studied the flame spectra produced by a variety of elements. 4
Explanation:
Which statement best describes glucose?
Answer:
The answer is the third one; It is organic because it dissolves in water.
Explanation:
Glucose, a monosaccharide with the formula C6H12O6, is the chief source of energy for both plants and animals. In plants, it is produced by photosynthesis, while in the body, glucose is broken down via glycolysis to form ATP, the body's primary energy molecule. Excess glucose is stored as glycogen in the liver.
Explanation:The statement that best describes glucose is that it is a monosaccharide with the chemical formula C6H12O6 and is the body's most readily available source of energy. Glucose is pivotal for the energy requirements in both plants and animals. In plants, glucose is synthesized using carbon dioxide and water during the process of photosynthesis, and excess glucose is stored as starch.
In the human body, glucose enters the cells via the circulatory system. Here, through a series of reactions known as glycolysis, glucose is broken down, which helps in the formation of adenosine triphosphate (ATP), an essential molecule that provides the energy required for several cellular functions. Any excess glucose is stored in the liver as glycogen.
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What do plants do with the nitrogen they absorb through their roots?
Final answer:
Plants absorb nitrogen through their roots in the form of nitrates, produced by nitrogen-fixing bacteria that live in soil or plant roots. This nitrogen is used to synthesize vital organic compounds like amino acids. Decomposers and nitrifying bacteria also play key roles in the nitrogen cycle by recycling nitrogen back into the soil for plant use.
Explanation:
Plants absorb nitrogen in the form of compounds such as nitrates through their roots, which are essential for their growth. The nitrogen absorbed is a crucial part of the nitrogen cycle, where nitrogen-fixing bacteria convert atmospheric nitrogen into forms that plants can use. These bacteria either live in the soil or in symbiotic relationship with the roots of leguminous plants such as peas. The fixed nitrogen is then used by plants to create amino acids, proteins, and other important organic compounds that are vital for plant growth and development.
Moreover, decomposers play a vital role in the nitrogen cycle by breaking down organic matter, including dead organisms and waste, and releasing nitrogen back into the soil in the form of ammonium ions, which plants can also absorb. These ammonium ions may be further transformed into nitrates by nitrifying bacteria in the soil, completing the cycle and enabling plants to continue to assimilate the nitrogen they need.
1. Describe how nighttime carbon dioxide concentrations near the forest should compare with the midday
concentrations near the forest. Explain your answer using two biological processes.
Answer: carbondioxide concentration is high at night, and low during the midday.
Explanation:
This can be explained with the PHOSYNTHESIS and RESPIRATION (cellular respiration).
Photosynthesis is the process of manufacturing of food substances by plants, bacteria and some other organisms. These organisms use energy in sunlight to combine carbondioxide and water, in the presence of the green pigments (chlorophyll in leaves) and enzymes to form GLUCOSE and OXYGEN. Glucose is the main end product (digested food in plants.)The oxygen is for other organisms including man, and plants to breathe in.
SUNLIGHT
C02 + H2 0 ---------------- > C6 H 12 06 + Oxygen
Chlorophyll
Sunlight is needed to breakdown oxygen and protons in water molecules. This is the source of oxygen molecules in photosynthesis that we human and other animas take in. The hydrogen is needed for glucose production.
Therefore during the midday, the concentrations of CO2 at midday near the forest is always low because plants continuously use these for photosynthesis, by removing it from atmosphere.
However, at night time C02 concentration near the forest is always high. This is because at night, the rate photosynthesis drops because there is no sunlight. But plant undergo respiration by breaking down the glucose manufactured during (phosynthesis) by combining it with oxygen to produce carbondioxide, and water vapour. This increases C02 concentrations at night.
Glucose + Oxygen ------> Carbondioxide and Water
C6 H 12 06 + 602 ------> 6C02 + 6H 0
Which organism in this ecosystem would have the smallest population? why?
Answer:
The hawk, because the habitat would only be able to support a few at once. If there are more than a few, than they start dying off due to competition.
Explanation:
Did you get your answer 2 years ago? Please tell me what it was.
A cell from a tissue culture has 38 chromosomes. After mitosis and cytokinesis, one daughter cell has 39 chromosomes and other has 37. What might have occurred to cause the abnormal chromosome numbers?
An abnormal number of chromosomes is known as aneuploidy, which is a kind of chromosomal abnormality.
What are abnormal chromosome numbers?By either adding or losing chromosomes during mitosis, an aneuploidy results in daughter cells with a total number of chromosomes that is not an exact multiple of a haploid set.
Aneuploidies are typical of several chromosomal abnormalities and cancer cells. In addition, monosomy is a kind of aneuploidy in which daughter cells have just one copy of each chromosome rather than the two copies that diploid cells have.
For instance, the removal of the X chromosome results in Turner syndrome, a monosomy.
Therefore, one daughter cell having 39 chromosomes and the other having 37, is due to aneuploidy.
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what structure, in the human body, performs similar function as sieve tube?
Phloem tissue in the human body performs a similar function to the sieve tube. It consists of sieve-tube cells that are arranged in a long tube and transport organic substances.
Explanation:Phloem tissue is a plant vascular tissue responsible for transporting organic nutrients, primarily sugars produced during photosynthesis, from the leaves to other parts of the plant. It consists of specialized cells, including sieve tube elements and companion cells, and functions bidirectionally, facilitating the distribution of essential substances throughout the plant.
In the human body, the structure that performs a similar function to the sieve tube is the phloem tissue. The sieve-tube cells in the phloem tissue are arranged end to end to form a long sieve tube, which transports organic substances like sugars and amino acids. These substances flow through perforated sieve plates that connect the sieve-tube cells.
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With sympatric speciation a physical barrier arises and separates two populations ending gene flow between them.
Explanation;
False.
This describes allopatric speciation.
During the process of cell division, spontaneous changes within the genome can arise, called mutations. These are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes.
These mutations form variants which become stable within a population, leading to the formation of separate, genetically distinct populations called species. New species arise through several evolutionary mechanisms such as:
allopatric speciation- physical barriers to gene flow ; isolation of groups which evolve separately in their environments by accruing suitable traits, to become a new speciesperipatric speciation- similar to allopatric speciation, but one group is much smaller, making the unique traits more notable, or distinctparapatric speciation- subpopulations in a large geographic region evolve reproductive isolation by mating with those nearby, however they continue to undergo gene exchange along a common border regionand sympatric speciation- absence of physical barriers which hinder gene flow; reproductive isolation arise through many forms of the same genes called polymorphismsLearn more about mutations at brainly.com/question/4602376
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Genetic disorders can result when sister chromatids fail to separate properly
During which phase is this problem most likely to occur?
Answer:
Genetic disorder that can result when sister chromatids fail to separate properly is likely to occur in meta-phase (m-phase) because in mitosis during m-phase there is separation of DNA to two equal halves.
Explanation:
Genetic disorder is the problem that is caused by the abnormal activities in gene. This is also called mutation which may cause due to error during replication of DNA and also due to some environmental factors such as radiation exposure, smokes. So, during meta-phase, genes might not separate and genetic disorder might happen.What aspect of the cell theory did Redi’s experiment support? Explain.
PLEASE EXPLAIN AND USE DETAILS FROM THE PASSAGE...
Answer:
All cells come from pre-existing cells.
Explanation:
Cell theory was proposed by MJ Schleiden , T.Schwann and Rudolf Virchow.Cell theory states that, all organisms are made up of cells, Cell is the structural and functional unit of life and Cells arise from pre-existing cells.In ancient time there was a concept of spontaneous existence of life.People believed that life arose from inorganic substances.But when Fransesco Redi observed that maggot arose on meat.He hypothesised that the maggot must have risen from fly egg.To confirm this hypothesis he set up an experiment in which he kept meats in flasks; some open to air, some covered with gauge and some completely sealed.It was obvious that the sealed flask will not support life as it does not have air .The flask covered with gauge proved that the concept of evolution of life from inorganic substance was wrong because the flask had all the inorganic elements that support life like air water light etc but no maggots grew in it.The open flask , in which the maggots grew proved that maggots arose from the eggs that were laid by the fly.Only the open flask had provisions for the fly to enter it and lay eggs. These eggs were the first cell of the maggot.Thus, Redi's Experiment supported the fact that cells arise from preexisting cells.The formation of sperm cells and egg cells is necessary for which of the following processes?
Answer:
Meiosis.
Explanation:
Meiosis is used to make special cells - sperm cells and egg cells
The formation of sperm cells and egg cells is necessary for the process of meiosis.
What is meiosis?Meiosis is a type of reproduction in which a parent cell divide into four daughter cells that are genetically different from the parent cell. The daughter cells have half number of chromosome of the parent cell.
This process produce the gametes which are the sperm cell and egg cell.Meiosis or gametogenesis is the process that produce human egg and sperm cell. Meiosis or gametogenesis is the process that produce human egg and sperm cell.
Meiosis is a special type of nuclear division which segregates one copy of each homologous chromosome into each new "gamete". It reduces the number of set of chromosomes by half, from 46 to 23, so that when gametic recombination or fertilization occurs the ploidy of the parent will be reestablished. Spermatogonia are the cells in the testes that will undergo meiosis while Oogonia are the egg cells that will undergo meiosis.
Therefore, The formation of sperm cells and egg cells is necessary for the process of meiosis.
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Produce an equation that could be used to calculate the population growth of a certain population (e.g a country's
population growth).
Answer:
r = (b-d)/p
Explanation:
Net reproductive rate is (r)
Births is (b)
Deaths is (d)
Population is (p)
Which of the following is NOT necessary for multicellular life? A. Sexual reproduction B. Cell adhesion C. Signalling between cells D. Cell to cell corodination
Answer:
A. Sexual reproduction
Explanation:
A multicellular organism is made up of more than one cell. Humans, animals, and plants are all examples of multicellular organisms. Groups of cells form tissue, groups of tissue forms organs, groups of organs form systems.
Unicellular organisms receive material directly from their environment. Multicellular organisms have systems for moving materials throughout their body. Unicellular organisms can perform all of life’s functions within a single cell. Multicellular organisms have many cells that each perform a special function. Cells develop into their mature forms through the process of cell differentiation. Cells differ because different combinations of genes are expressed. Organs are groups of tissues that perform a specific or related function. Organ systems are groups of organs that carry out similar functions.
For example, stem cells are classified into three types: totipotent (or growing into any other cell type), pluripotent, or growing into any cell type but a totipotent cell), multipotent (or growing into cells of a closely related cell family).
What are the unique drivers of behavior that are a result of language and culture?
Answer:
Meme
Explanation:
The term "meme" is well known all over the world. It is usually used in the "world of the internet." It refers to the phenomenon of "virilizing" a piece of information, ie, any video, image, phrase, idea, music, and so on. It helps to spread any knowledge between multiple users from all over the world within a short time. Along with this, it helps to achieve a lot of popularity quickly. The idea of a meme can be summed up by a conductor of behavior that results from the language and culture of a particular place. It can multiply through the ideas and information that originate from individual to individual.
Language and culture intricately influence behavior through gendered communication expectations, cultural norms governing public discourse, and the shaping of thought and action. These factors affect group behaviors and consumer preferences, reflective of deep cultural diversity.
The unique drivers of behavior resulting from language and culture include the roles, attitudes, and personality traits associated with different ways of speaking within a cultural group. Language and gender play a crucial role, with various cultures imposing different expectations on how individuals should communicate based on their gender identities. Deviating from these prescribed roles can lead to social repercussions. Cultural norms and rules influence communication patterns, including which topics are considered appropriate to discuss in public and private spaces. In addition, language, as a complex and flexible tool, shapes our thought and actions, organizes our world, and preserves culture through dynamic speech communities and performative rituals.
These cultural and linguistic differences can influence how people behave in groups, how we interact with each other, and how consumer preferences form based on social norms and religious beliefs. This diversity reflects not just in international contexts but also within communities that share the same language, indicating the deep intertwining of language, culture, and individual experience. Understanding these factors is crucial for fostering effective communication and addressing the subtle nuances that arise from cultural diversity.
does fire have a defined boundary
Answer: Yes.
Explanation: Prescribed burning activity where fire is applied generally to most or all of an area within well defined boundaries for reduction of fuel hazard, as a resource management treatment, or both.
The statement "does fire have a defined boundary" is absolutely true.
What is a Fire?Fire may be defined as a circumstance, procedure, or instance of the burning of fuel or another material that is being ignited and significantly combined with oxygen, liberating light, heat, and flame.
Such types of fire activities generally possess definite boundaries in order to reduce the fuel that is significantly hazardous for the survival of the living organism.
Apart from this, a fire is initiated under full control as well as the management of an external team for regulating the extreme resource utilization, the level of destruction, absolute treatment of resources, and their treatment.
It may also be thought that the activity of fire is one of the most dangerous for the lives and properties of all sorts of living organisms.
Therefore, the statement "does fire have a defined boundary" is absolutely true.
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which organism is the primary consumer in this food chain? oak tree> squirrel> owl> eagle
A) eagle.
B) squirrel.
C)owl.
D) oak tree.
needin asap for apex!
Answer:
B. Squirrel
Explanation:
Oak tree -> squirrel ->owl ->eagle
squirrel is eating the producer which makes the squirrel the primary consumer
Osmosis, or the movement of water into and out of a cell, is directly related to the concentration gradient on both sides of the cell membrane and indirectly to the fact that
A) water has a high heat of vaporization.
B) water has hydrogen bonds that promote cohesion.
C) the adhesive properties of water promote its capillarity.
D) the polarity of water molecules make it the universal solvent
Explanation:
D) the polarity of water molecules make it the universal solvent
In osmosis, molecules of water move across a semi permeable membrane, from regions of high concentration to regions of low concentration until an equilibrium is reached. This always occurs along the concentration gradient within the system.
Given that water is a universal solvent, capable of dissolving most chemical substances, solutes diffuse into water-filled regions constantly, and the osmotic potential, along with the solute potential may constantly undergo change. Osmosis, restores osmotic balance through the movement of water molecules while restricting the movement of solutes.
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The table below shows the average distances of Venus and Earth from the sun.
What is the difference between the orbital periods of Venus and Earth?
a. 1.72 years
b. 1.62 years
c. 0.62 years
d. 0.28 years
Answer:
The answer is C. 0.62 years
Examine the images carefully and use them to answer PART A and PART B.
Escherichia coli, or E.coli, is a species of bacteria. Entamoeba histolytica, or E. histolytica, is a single-celled amoeba. What do E. coli and E. histolytica have in common? Select all that apply.
A. They depend on sources of energy or food.
B. They are unable to respond to changes in their environment.
C. They maintain homeostasis by cell specialization.
D. They reproduce.
Answer:
The correct answer will be option- A and D
Explanation:
E.coli is a bacteria which is pathogenic to humans and E. histolytica is an amoeba which is a parasite. Both are different species but both are single-celled organism which to survive share feature among them.
The common characters shared by these two species are: they depend on the source of energy for their survival which they usually get from the hosts. Both the species reproduce to produce progenies like them which help them maintain continuity of the species of Earth.
Thus, options- A and D are the correct answer.
Both Escherichia coli and Entamoeba histolytica are species of bacteria. They both depend on sources of energy or food and are also capable of reproducing. A and D are the right options.
Bacteria species, including E. coli and E. histolytical, are generally heterotrophic. In order words, they are not able to manufacture their own food but depend on external sources for their food or energy.
Both E. coli and E. histolytical are also capable of fulfilling the characteristics of living organisms, which include reproduction.
Bacteria are capable of reproducing in a variety of ways, including binary and multiple fission.
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How many cells make up the human body?!
Answer:
about 37.2 trillion cells in the average human body
Explanation:
Two genotype individuals Xx and xx cannot have genotype children:
I. xx
II Xx
III. XX
A) only I
B) only II
C) only III
D) I and II
E) II and III
Answer:
C.)
Explanation:
There is no way that they can have XX children because one parent has xx there is no other capital x
Answer:
C
Explanation:
1. What is the end product of replication?
Answer:
In replication, the end result is two daughter cells.
Explanation:
The end product of DNA replication is two identical daughter DNA molecules, each composed of one old and one new strand. The 'end-replication problem' causes a loss of DNA at the 5' end in linear chromosomes, which is partly addressed by telomeres.
The end product of replication is two identical daughter duplex DNA molecules. Each is comprised of one original (parental) and one new (daughter) DNA strand. This occurs due to DNA replication, which is essential for cell division and is facilitated by a host of enzymes and proteins. During this process, an RNA primer is required to initiate synthesis. Problems such as the end-replication problem affect the 5' ends of linear chromosomes, where RNA primers are removed, causing a gradual loss of DNA sequences with each cell division. Telomeres help mitigate this issue to an extent. The RNA primers used during replication are replaced with DNA nucleotides, but the primer at the 5' termini cannot be replaced, leading to progressively shorter DNA strands with successive replications.
Furthermore, in some organisms like bacteriophages, during replication, DNA can be produced in a concatameric form which is later cleaved to package a single genome inside the phage capsid. This unique replication method is important within the context of viral DNA replication.
An astronaut compares the time passing on a watch worn while on a mission orbiting Earth with an identical watch on Earth
The astronaut's watch shows that two hours have passed.
What would the watch on Earth show?
Less than two hours have passed because time passes more slowly in areas with stronger gravitational fields
O More than two hours have passed because time passes faster in areas with stronger gravitational fields
Less than two hours have passed because time passes more slowly in areas with weaker gravitational fields.
More than two hours have passed because time passes faster in areas with weaker gravitational fields.
Less than two hours have passed because time passes more slowly in areas with stronger gravitational fields.
Answer: Option A
Explanation:
Einstein discovered the concept called general relativity that is used to predict the space-time. Also, he found that the time and space were conjoined into a continuum as space-time. He proved that the space-time is wrapped and twisted due to the earth's rotation.
He also proved that time will not pass for everyone at the same rate. A fast-moving person can experience that time passing relatively slower than a person without motion. And this difference between the observation of time is called time dilation.
Also, when you are far away from the earth's surface the time goes faster than the time on the earth's surface. This phenomenon is known as gravitational time dilation.
While traveling to space, a huge amount of speed is required for a mass object to escape the strong gravitational force of the earth. Thus the strong gravity curves the space time and shows the time slower meanwhile the normal person in the earth has time running normally.
Answer:
A
Explanation:
EDGE 2021
making a financial transaction based on information not available to other investors is known as
Answer:b
Explanation:
Insider trading is the practice of engaging in a cash product based on information that is not usually accessible to investors.
Why did you use the word "transaction"?A transaction is described as the exchange of goods and services, the transfer of cash, or the agreement to trade goods & services in the future, based on the transaction definition.
What kinds of transactions are there?In a firm, there really are primarily four different sorts of financial transactions. Sales, acquisitions, receipts, & payments are the four different categories of financial transactions. Let us just take a moment learning about each of them: Sales are the exchanges in which a purchaser trading activity to a sellers in exchange for money and credit.
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