Exchange are surfaces that are adapted to maximise the efficiency of and solute (a substance dissolved in a liquid) exchange across them
Answers
Exchange surfaces are those surfaces that are adapted to maximize the efficiency of solute exchange across them. These surfaces have many features that are designed to increase the rate of exchange.
For example, the surface area of exchange surfaces is often increased to allow for greater exchange of solutes. In addition, the surface may be made of materials that allow for faster diffusion of solutes.
Furthermore, the structure of the surface may be adapted to create channels or pores that allow for faster transport of solutes. Finally, the surface may be modified to contain specialized proteins, such as ion pumps, that allow for more efficient exchange of solutes.
Exchange surfaces are important as they allow for faster and more efficient exchange of solutes, and thus can have a significant impact on the overall rate of exchange.
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Related Questions
which portion of a gene has the greatest effect on the timing and amount of protein produced in a cell?
Answers
Option b is the right response to the provided question. The time and amount of protein generated in a cell are most greatly influenced by the promoters of a gene. DNA sequences known as promoters indicate the starting place of RNA polymerase's transcription of a gene.
Typically, promoter sequences are located at the transcription initiation site's 5' end or right upstream of it. The DNA transcription unit's promoter and regulatory sequences collaborate to create RNA, which is then translated into proteins. The series of nitrogenous bases that control transcription and translation are also referred to as regulatory genes, and they can also control how RNA or proteins are formed.
Therefore, we can conclude that a gene's promoters have the largest influence on the time and volume of protein production in a cell.
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Your question is incomplete. Please find the complete question below.
Which portion of a gene has the greatest effect on the timing and amount of protein produced in a cell?
a) Exons
b) Promoters
c) Codons
d) Poly-A tail
e) 5' MG cap
f) They are all the same.
Sea levels rose most rapidly between 15,000 and 8,000 years ago. Use the graph to calculate the rate of sea level rise during this time, both in meters per century and mm per year.
Answers
The sea level change 15000 years ago can be seen from the graph to be 110 meters. The water level in the sea during 8000 years ago was found to be 10 meters. So the rise in the sea level was found to be 100 meters.
There are two primary factors that are responsible for a rise in the sea level. The melting of ice sheets and glaciers results in an increase in the water level in the sea.
The warming of seawater causes an expansion in the sea's water volume. A decline in the amount of water level on the land like in the lakes, rivers, and other reservoirs also contributes to a rise in the sea level.
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The backbone of the internet is formed by:____.
a. network access points (naps).
b. metropolitan area exchanges (maes).
c. internet exchange points (ixps)
Answers
Option C is correct .
The backbone of internet is formed by internet exchange points (IXPs) are IP networking which allowing , allowing participant internet service provider to exchange data destined for their respective networks.
Internet exchange point is physical location through which internet infrastructure competencies such as internet service providers and CDNs are connect with each other.The primary alternative of IXPs is private peering , ISPs directly connect their networks to each others.
Its allow network to interconnect directly , the exchange , rather than going through one or more third party networks.Advantages of direct interconnection are cost, latency and bandwidths consists of more the one networks switches by which each of the participating ISPs connect.
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Cork is a material that is often used to make bottle stoppers and bulletin boards. This material is made from cork oak trees.
In 1665, a scientist named Robert Hooke examined a thin slice of cork under a microscope. The slice was made up of many small compartments, which Hooke called cells.
What part of cell theory does Hooke's discovery best support?
A.
Energy flow, or metabolism, occurs within cells.
B.
All new cells come from pre-existing cells.
C.
Cells are the basic building blocks of all living organisms.
D.
Cells contain genetic material that is passed to daughter cells.
Answers
Answer:
C. Cells are the basic building blocks of all living organisms.
identify 2 materials that are transported by the blood.
Answers
Explanation/Answer :Blood moves continuously through the body, delivering oxygen and other materials to cells and removing carbon dioxide and other wastes from cells.
Please help and explain why to in one sentence each
Answers
Answer:
EPA is the primary regulating authority, like most other federal statutes the CAA is primarily implemented by states, local and tribal authorities which have been delegated implementing and regulatory authority by EPA.
How many lights were used...
Answers
Answer:b
Explanation:
a mutated gene that transforms a normal cell into a tumor cell is called a
Answers
A mutated gene that transforms a normal cell into a tumor cell is called an oncogene. Oncogenes are derived from normal genes, called proto-oncogenes, which play essential roles in cell growth, division, and differentiation.
However, when mutations or other genetic alterations occur, proto-oncogenes can become oncogenes, leading to uncontrolled cell growth and potentially the development of cancer.
The process of normal cells transforming into tumor cells is called carcinogenesis. Mutations can be caused by various factors, such as exposure to carcinogens, radiation, viruses, or inherited genetic defects. These mutations may lead to the activation of oncogenes or the inactivation of tumor suppressor genes, which normally function to prevent excessive cell growth and maintain genomic stability.
The activation of oncogenes can result in continuous cell proliferation, evasion of cell death, increased angiogenesis (formation of new blood vessels), and metastasis (the spread of cancer cells to other parts of the body). Furthermore, oncogenes can contribute to the development of a tumor microenvironment that supports the growth and survival of cancer cells.
Cancer therapies often target oncogenes and the signaling pathways they control to stop the growth and spread of tumor cells. By understanding the role of oncogenes in carcinogenesis, researchers continue to develop new treatments and strategies to combat cancer and improve patient outcomes.
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What term describes members of the same species living at the same place ah the same time?
(1 Point)
Carrying Capacity
Population
Limiting Factor
Growth Rate
Answers
Answer:
Population- This is why we refer to the amount of people in an area as the area's population
5-Coat colour in cattle is controlled by two codominant alleles. The genotype CRCR results in cattle with a red coloured coat. The genotype CWCW results in cattle with a white coloured coat. The genotype CRCW results in a roan coat; these cattle have a mixture of red hairs and white hairs in their coat. A mating occurs between a red cow and a roan bull. What is the expected ratio of coat colour in the offspring? (1mark)A) 50% red, 50% whiteB) 100% redC) 50% red, 50% roanD) 100% roan
Answers
In codominance we have the following fact:
If an offspring phenotype is heterozygous, the offspring will exhibit both traits from the parents.
Let us denote by RR the genotype that results in cattle with a red-colored coat and by WW the genotype that results in cattle with a white-colored coat. Then, RW results in a roan coat. Now, if we cross a red cow and a roan bull, we have the following Punnett square:
This means that
1. 50% of the offspring presents the genotype RR (cattle with a red-colored coat)
2. 50% of the offspring presents the genotype RW (roan coat)
for a ratio of 2:2.
We can conclude that the correct answer is:
Answer:C) 50% red, 50% roan
If the mass of an object is 46kg and volume is 7m³, what is the density of the object? Give your answer to 2 decimal places. P = kg/m³ New Line 1
Answers
The density of the object is 6.57 kg/m³.
To calculate the density of an object, we divide its mass by its volume. In this case, the mass of the object is given as 46 kg, and the volume is given as 7 m³. By dividing the mass (46 kg) by the volume (7 m³), we can determine the density.
Density (P) = Mass (m) / Volume (V)
Substituting the given values into the formula, we get:
P = 46 kg / 7 m³
Performing the division, we find that the density of the object is approximately 6.57 kg/m³. It is important to round the answer to two decimal places, as specified in the question.
Density is a measure of how much mass is contained within a given volume. In this case, the object has a mass of 46 kg and occupies a volume of 7 m³, resulting in a density of 6.57 kg/m³. The units of density are typically expressed as mass per unit volume (kg/m³).
By calculating the density, we can understand how tightly packed the mass is within the object and compare it to the densities of other substances or objects.
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What is the role of RuBP? How is RuBP regenerated?
Answers
Answer: RUBP Regeneration refers to the cyclical process where the photosynthetic enzyme Rubisco fixes carbon dioxide into the sugars that fuel plant growth and productivity. Only one-sixth of the PGA carbon is converted to sugar—the rest of the carbon is used to recycle RuBP as the cycle continues.
Explanation:
_____ are mutated genes that are always active.
Answers
The mutated genes that are always active are called oncogenes. Oncogenes are genes that have the potential to cause cancer when mutated.
Proto-oncogenes, or normal genes, may become oncogenes as a result of mutations or increased expression. Cancer-causing mutations in oncogenes are often dominant, meaning that only one mutated allele is needed to cause the disease.Oncogenes, as previously stated, are mutated genes that are always active. They promote cell growth and division by signaling to other genes in the body.
When oncogenes become overactive, they promote rapid cell growth and division, resulting in the formation of tumors, which can be malignant or benign. The excessive activity of these genes can lead to uncontrolled cell growth and division, resulting in cancer. Oncogenes are frequently inherited or acquired later in life as a result of environmental factors. In conclusion, oncogenes are mutated genes that promote cell growth and division and are always active, leading to the development of cancer when they become overactive.
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Which three statement’s describes the energy relationships among the species
Answers
Answer:
C,D,E are the answers!
Explanation:
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Answer:
C,D and E
Explanation:
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In the early days of germ theory, contagious diseases were thought to be caused only by fungi or bacteria. In the 1890s, Dmitri Ivanovski filtered extracts from diseased tobacco plants and discovered that the disease could be transmitted to new plants through the filtrate. He hypothesized that something smaller than bacteria or fungi was responsible for the transmission of the disease. Which best explains how Ivanovski's work led to a change in the germ theory? He tried to promote his hypothesis as a law. He used a new experimental method to test his hypothesis. He used a more powerful bacterial strain than other scientists had. He obtained results that confirmed what other scientists were thinking.
Answers
Answer:
He used a new experimental method to test his hypothesis.
Explanation:
Dmitri Ivanovski, a Russian microbiologist who was born in the year 1864 and died in 1920. He was the scientist who initiated the discovery of viruses as a pathogenic microorganism. He worked to discover the cause of mosaic disease in tobacco plant and he hypothesized that that something smaller than bacteria or fungi, as early believed, was responsible for the transmission of the disease.
In order to test his hypothesis, he passed a solution containing the causative agent of the disease, which he prepared from the infected plant leaves, through a filter known as Chamberland filter. He was able to discover that the filtrate still contained microbial pathogens that can infect more tobacco plants, confirming his hypothesis that something smaller than fungi or bacteria is responsible for the tobacco mosaic infection.
Hence, to test out his hypothesis, Ivanovski in the 1890's used a new experimental method i.e. CHAMBERLAND FILTER method.
which of the following methods is not used by cells to regulate the amount of a protein in the cell? group of answer choices genes can be transcribed into mrna with different efficiencies. many ribosomes can bind to a single mrna molecule. proteins can be tagged with ubiquitin, marking them for degradation. nuclear pore complexes can regulate the speed at which newly synthesized proteins are exported from the nucleus into the cytoplasm.
Answers
2. Many ribosomes can bind to a single mRNA molecule. Genes can be transcribed into mRNA with different efficiencies, but this is not a method used to regulate the amount of a protein in the cell.
This process is called "polyribosome" or "polysome" formation and it actually increases the rate of protein synthesis rather than regulating the amount of a protein in the cell. The other three methods mentioned are indeed involved in regulating protein levels within cells.Instead, transcription efficiency is used to regulate the amount of mRNA produced from a gene, which in turn affects the amount of protein produced. The other three options are all methods used to regulate the amount of protein in the cell. Ribosomes can bind to a single mRNA molecule, allowing many proteins to be produced from a single mRNA molecule. Proteins can be tagged with ubiquitin, marking them for degradation and reducing the amount of protein present in the cell.
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Which of the following joints are primarily
synovial?
O elbow joints
O joints in the spine
O shoulder joints
O joints in nerves
Answers
Answer:
C. shoulder joint
Explanation:
PLEASE HELP ASAP!! 30 POINTS!!!
You are looking at your breakfast plate. You were talking a lot and your food is now cold. Under your bacon, there is a white solid substance. This substance is most likely a _______________.
A) lipid
B) carbohydrate
C) nucleic acid
D) protein
Answers
Answer:
It's fat, so the answer is A
fats or lipids are provided by oils, fatty fish, nuts and red meat.
what inferences can be drawn about competition between the carnivore morphs of these two species
Answers
Based on the graph, the following conclusions may be drawn:
As produced with mixed species, the average snout-vent length of the S. mulitplicata carnivore morphs species reduces from 6mm to 4.2mm those compared to when grown with pure species.When these two species (S. bombifrons and S. multiplicata) are cultivated together, phenotypic divergence of the species is encouraged due to character displacement. As a consequence, when cultivated with mixed species, the average snout-vent length of S. bombifrons tadpole carnivorous morphs species increases from 7.8mm to 9.8mm as compared to when produced alone.
This variation in growth characteristics can be related to the phenomena of polyphenism, which occurs as a result of their divergent eating habits.
Competition is an interaction between organisms or species in which both demand a scarce resource (such as food, water, or territory). Competition diminishes the fitness of both animals involved since the presence of one reduces the quantity of resource accessible to the other. Interference, exploitation, and seeming competition are the three basic processes of competition.
Competition inside and between individuals of a species is an essential biological interaction in the study of community ecology. Competition is one of numerous biotic and abiotic elements that combine to influence community structure, species diversity, and population dynamics (shifts in a population over time).
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Five hundred cockroaches of one species were sprayed with a new insecticide. Twenty-four hours later nearly all the cockroaches were dead. A few, however, survived. This outcome illustrates which one of darwin’s key ideas about natural selection and variation?.
Answers
Answer:
This shows that over time, some insects can become "pesticide-resistant" meaning that pesticides don't affect them anymore. And this only happens every few generations. Therefore, each generation is being naturally selected and accumulating variations that make them resist the chemicals. This shows that each cockroach's genes are changing to give them variation from the rest of the population.
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flowering plants have showy flowers, and they produce nectar to attract insect. insects eat the nectar and transport pollen between plants, thus pollinating the plants. what type of relationship is this?
Answers
Answer:
if i understood the question correctly, the relationship between them is called a symbiotic relationship.
Explanation:
For example, a bee, bees have a symbiotic relationship with flowers, which means that while the flower that the bee chose to pollinate are benefiting from being pollinated bees are also receiving benefits in return.
The relationship between flowering plants and insects, in which the plants produce showy flowers and nectar to attract insects that eat the nectar and transport pollen between plants for pollination, is called mutualism. The plants provide nectar as a food source for the insects, while the insects unknowingly assist in pollination, helping the plants reproduce
Mutualism is a type of symbiotic relationship between two different species, in which both species benefit from the interaction. In mutualism, both species provide a resource or service to each other that they would not be able to obtain otherwise, leading to increased fitness and survival for both. Mutualism is an important ecological phenomenon that plays a crucial role in many different ecosystems, promoting biodiversity and helping to maintain ecosystem stability.
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Which best describes fetal development?
The heart beats and is heard during the first trimester.
The heart beats and is heard during the second trimester.
The heart beats during the first trimester, but is heard in the second trimester.
The heart beats during the second trimester, and is heard in the third trimester.
Answers
Answer:
A
Explanation:
Next time give option so people could understand
The best description of fetal development is the heartbeats, which are heard during the first trimester. The correct option is A.
What is fetal development?It is the process by which an embryo develops and evolves into a fetus. Fetal development during pregnancy is a particularly delicate stage that is influenced by both maternal and environmental influences. The process by which a human fetus develops during pregnancy is known as prenatal development.
Most people find the beginning of a new life to be an exciting period, and this essay will examine the creation process. The things that could impair the prenatal growth of that new life, such as environmental factors, will also be covered.
Therefore, the correct option is A. The heart beats and is heard during the first trimester.
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4 pts
The United States banned chlorofluorocarbons in aerosol cans. These actions became a
global movement and let to an international agreement on the ban. Which environmental
concern were governments directly addressing by eliminating the use of
chlorofluorocarbons in aerosol cans?
Tim
Atte
40
Dependency of fossil fuels.
Melting of icecaps.
Salinity levels in the ocean.
Levels of stratospheric ozone.
Previous
Next >
Answers
Answer:
Impact as greenhouse gases
CFCs were phased out via the Montreal Protocol due to their part in ozone depletion. However, the atmospheric impacts of CFCs are not limited to their role as ozone-depleting chemicals.
Explanation:
What is the probability of getting the same numbers on 3 dice when they are thrown simultaneously?
Answers
Answer:
So, assuming the dice are 'fair' (that each of the six numbers has a probability of 1/6 of showing up on each of the dice), there is a probability of 1/36 that all three dice will show the same number.
Explanation:
Select the type of Cell Transport shown in the picture.
Choose
Answers
Answer:
Osmosis
Explanation:
Osmosis: The movement of water from an area of high concentration to a low concentration through a partially permeable membrane.
Tyra has type 2 diabetes. How does type 2 diabetes differ from type 1 diabetes? Multiple Choice In type 2 diabetes, the pancreatic beta cells are damaged. In type 2 diabetes, individuals are more likely to be at a healthy weight. In type 2 diabetes, the cells resist the action of insulin. In type 2 diabetes, the liver is unable to produce glucose via gluconeogenesis.
Answers
Type 2 diabetes differs from type 1 diabetes in several ways. Firstly, in type 2 diabetes, the cells resist the action of insulin, whereas, in type 1 diabetes, the pancreatic beta cells are destroyed, leading to a lack of insulin production.
This means that people with type 2 diabetes may produce insulin, but their body is unable to use it effectively to regulate blood sugar levels.
Secondly, individuals with type 2 diabetes are more likely to be overweight or obese, whereas type 1 diabetes is not linked to weight issues. This is because excess body fat can contribute to insulin resistance and the development of type 2 diabetes.
Finally, the liver is still able to produce glucose via gluconeogenesis in type 2 diabetes, whereas in type 1 diabetes, there is no insulin to regulate this process, leading to high blood sugar levels.
It is important to note that while these differences exist between type 1 and type 2 diabetes, both conditions require careful management and monitoring to prevent serious complications. People with type 2 diabetes may need to make lifestyle changes, take medication, and monitor their blood sugar levels regularly to manage their condition effectively.
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A student is working on a lab exercise learning the techniques used in extracting DNA from blood. What forensic science discipline is the student practicing?
Answers
Forensic pathology is the discipline of forensic science which is used by the student who is working in the laboratory exercise learning the techniques used in DNA extraction.
What is DNA extraction?DNA extraction is the procedure of removal of the genetic material (DNA) from the cell or the evidence which are found at the crime scene to find the criminal.
Forensic Biology is the branch of science which involves the application of concepts and procedures in the biological sciences, typically in a medico-legal context. Forensic biologists analyze the samples, as well as the physiological fluids that are relevant to a legal investigation present on the crime scene. Forensic molecular biology (DNA) is the branch of forensic pathology which is used in the extraction and analysis of DNA found at the site of crime.
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The area around the Sahara Desert is slowly changing into a dry region, similar to the desert. Which trait is most likely to be selected in the population of plants growing in this region?
Answers
Answer:
Researchers have found that mitochondria and chloroplasts in eukaryotic cells have their own dna. this dna is different from the dna in a eukaryotic cell's nucleus. chloroplasts and mitochondria use their own dna and ribosomes to make some organelle-specific proteinswhat statement is best supported by this information? a. mitochondria and chloroplasts could exist outside of modern cells.b. modern cells could exist without mitochondria and chloroplasts.c. early eukaryotic cells engulfed prokaryotic cells, which later became mitochondria and chloroplasts.d. early prokaryotic cells engulfed eukaryotic cells, which later became mitochondria and chloroplasts.
Explanation:
Not having enough resources to satisfy all one's needs and wants
economics
O scarcity
O resource
O fixed cost
Answers
Answer:
Scarcity
Explanation:
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Answer:
Scarcity
Explanation:
Scarcity means the state of being in short supply or having a shortage of something.
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1. Eukaryotes are considered a combination between archaea and bacteria. A) Explain the theory behind the mixed origin of eukaryotes. B) The protistan Paulinella is has a photosynthetic plastid called a chromatophore. Chromatophores have a peptidoglycan membrane and their DNA is more closely related to cyanobacteria than to chloroplasts. Use this information to hypothesize the origin of the chromatophore.
Answers
A) Theory proposes that eukaryotic cells originated through symbiosis of different types of prokaryotic cells. B)Chromatophore in Paulinella may have originated from similar endosymbiotic event.
What is the theory behind the mixed origin of eukaryotes?A) Theory behind the mixed origin of eukaryotes, known as endosymbiotic theory, proposes that eukaryotic cells originated through symbiosis of different types of prokaryotic cells. It suggests that mitochondria, which are the organelles responsible for cellular respiration, were originally free-living aerobic bacteria that were engulfed by host archaeal cell, giving rise to the first eukaryotic cell.
B) Based on the information provided, it can be hypothesized that the chromatophore in Paulinella may have originated from a similar endosymbiotic event as chloroplasts in eukaryotes. The presence of a peptidoglycan membrane and close genetic relationship to cyanobacteria suggest that chromatophore was likely derived from ancestral cyanobacterium that was engulfed by the ancestor of Paulinella.
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