Primary brain cancers occur when normal cells' DNA changes (mutations). The DNA of a cell includes the instructions that inform the cell what to do. The mutations instruct the cells to grow and divide quickly and to live even when healthy cells would die.
What is a benign brain tumor?A benign (non-cancerous) brain tumor is a collection of cells that grows slowly in the brain. Non-cancerous brain tumors often remain in one location and do not spread. It usually does not return if the entire tumor can be safely removed during surgery.
They have the potential to injure and compress portions of the brain, resulting in serious malfunction. Benign brain tumors in a critical part of the brain can be fatal. A benign tumor can become cancerous very rarely.
Note that an overview was given as the complete information wasn't found.
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Which of these describe a galaxy
Answer:
Explanation:
Option please
Two types of nucleic acids are DNA and RNA. What are the functions of these two nucleic acids?
A-RNA makes nucleotides, and DNA puts the nucleotides together to make nucleic acids.
B-DNA creates amino acids, and RNA puts the amino acids together to make a protein.
C-DNA contains the code for proteins, and RNA helps make the proteins from amino acids.
D-RNA contains the code for proteins, and DNA helps make the proteins from amino acids.
Two types of nucleic acids are DNA and RNA. The functions of these two nucleic acids are DNA creates amino acids, and RNA puts the amino acids together to make a protein.
DNA is answerable for carrying and transmitting hereditary materials or genetic instructions from parents to offspring. In addition to ensuring that all living things pass on their genetic information, DNA is essential for the synthesis of proteins. on the other hand messenger RNA (mRNA) carries the protein draft from a cell's DNA to its ribosomes, which are the apparatus that drive protein synthesis. Transfer RNA (tRNA) then carries the relevant amino acids into the ribosome for inclusion in the new protein.
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there are two types of cells, prokaryotic and eukaryotic. although the types of cell share some similarities, compartmentalization is not a shared characteristic. it has been theorized that chloroplast evolved from prokaryotic cells living symbiotically within a larger cell. describe the endosymbiotic theory. explain how chloroplasts are similar to prokaryotic cells. provide observations and evidence that supports the theory.
Answer:
Chloroplasts and mitochondria are said to be prokaryotic as they have their own genes on a small, circular chromosome but no nucleus. This chromosome has little non-coding DNA, similar to those of bacteria. Chloroplasts and mitochondria also make some of their own proteins from their gene.
hence endosymbiotic theory states that some eukaryotic cell organelles like mitochondria and chloroplast evolved from free living prokaryotes.the prokaryotes or single celled organism fuse to form eukaryotes as stated by Margulis.
Explanation:
According to the endosymbiotic theory, some eukaryotic cell organelles, such mitochondria and plastids, descended from prokaryotes that were free to move around.
What are the characteristics of endosymbiotic theory?The endosymbiotic hypothesis postulates that some organelles of eukaryotic cells were once prokaryotic bacteria.
Chloroplasts and mitochondria are identical in size to prokaryotic cells and divide by binary fission. The DNA in mitochondria and chloroplasts is circular rather than linear.
The information available supports Margulis' hypothesis that the mitochondrial endosymbiosis marked the beginning of the evolution of the eukaryotic cell.
Therefore, endosymbiotic theory states that some eukaryotic cell organelles like mitochondria and chloroplast evolved from free living prokaryotes.
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Design a Model
Part A Think of another common object around your house or school that you could use to model a cell. Describe the object. Based on its characteristics, does the object best model an animal cell, a plant cell, or a bacteria cell?
Part B Describe two advantages and two limitations of the model you selected.
The cell is the smallest unit of an organism. Recall that the cell is composed is a self sustaining unit. This implies that the cell has many components that is able to provide for the needs of the cell. The cell is thus depicted as quite a self sufficient unit in itself.
Having said this, the object that is around my school that could be used to model a cell is the motor vehicle. The motor vehicle looks more like the plant cell because of the presence of the body and the windscreen that provides support for the car and protects it from external pressure. The energy for the car to function is provided by the engine of the car were combustion occurs. This is similar to what happens in the mitochondria of the plant cell.
This model can be used to show the various parts of the cell and it also shows the cell as a compete unit. However it falls short in the sense that a car is a nonliving thing and is incapable of cooperating with other units.
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How does a cell in a cow use food to move and function?
Answer: Matter movement
Explanation: Large organic molecules or polymers, carbohydrates, fats/lipids, proteins enter into the cow and move through.
What part in the cell cycle results in identical daughter cells
How are messages carried throughout the human body from the brain to the nervous system?
Answer: The nervous system uses tiny cells called neurons to send messages back and forth from the brain, through the spinal cord, to all the nerves throughout the body. Billions of neurons work together to create a communication network. Different neurons have different jobs.
Explanation:
Neurons are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.
the are the regions of the auditory pathway of the human brain in which information from both ears is first integrated. group of answer choices
The superior olivary nuclei are the regions of the auditory pathway of the human brain in which information from both ears is first integrated.
The superior olivary nuclei can be described as a region that helps in multiple ways for hearing of sound. One of the main functions of the superior olivary nuclei is to locate from where a certain sound is being produced in the ear.
The superior olivary nuclei are also involved in the integration of sound information from both ears. Sound lateralization is an important function the superior olivary nuclei.
The superior olivary nuclei are present not only in humans but also in other mammals, reptiles and amphibians.
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aegyptopithecus has been found in two sizes, both in skull and canine size, and in canine shape. what might this suggest about their social structure?
This, in the opinion of many paleoanthropologists, supports Aegyptopithecus' status as a primate, ape, and human ancestor.
What characteristics of Proconsul indicate that it is an early ape?The absence of a tail is the main characteristic that distinguishes Proconsul from living apes; other traits that can be considered "ape-like" include its improved grasping abilities, stabilized elbow joint, and facial structure. Like modern-day gibbons and other nonhuman apes, Proconsul could not effortlessly hang from tree branches.
The shape of the nostrils distinguishes catarrhines and platyrrhines. Platyphines have broad, flat nostrils that face sideways, whereas catarrhines have narrow nostrils that face downward. The physical characteristics of primates help to distinguish them from other species.
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which is not a function of the lymphatic and immune systems? question 90 options: a) transport fats absorbed by the small intestines. b) primary defense against the invasion of pathogens. c) assist in the blood clotting process. d) collect excess tissue fluid and return it to the circulatory system.
c) Assist in the blood clotting process is not a function of the lymphatic and immune systems.
Blood clotting is a process that is done by the coagulation system of the body. Neither the lymphatic nor the immune system has any role is the blood clotting process.
The major role of the immune system is to provide a defense to the body agast any foreign particle that invades the body and has the potential to cause an infection in the organism.
The major function of the lymphatic system is to remove all the excess fluids in the body so that the fluid levels can be maintained in the body of an organism.
Hence, all of the above options are either the function of the immune of the lymphatic system except option c.
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Could an insoluble precipitate of an ionic compound pose a danger to theenvironment? Explain your reasoning.
The insoluble precipitate of ionic compound can pose great threat to the environment.
Insoluble precipitate is a solid substance formed during a chemical reaction. The precipitate of ionic compounds can cause danger to the environment as it is not degraded and hence can cause reactions that form toxic products.
The effects of insoluble precipitate on the environment are various. It can make soil less rich in nutrients that will then affect the quality and yields of plants. If the precipitate is present on the surface of plants, which is then ingested by humans, it can cause diseases in humans as well. It can cause eutrophication of waterbodies, therefore affecting the lives of aquatic species.
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Chromatin from two tissues, skin and liver, was extracted and analyzed near the gene twist. The liver chromatin was found to be more dnase sensitive than the chromatin from skin cells. What might explain this difference?.
The twist is silenced in skin and not liver which is the reason why liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.
What is Gene twist?This is referred to as a transcription factor which provides the instructions in the making of a protein in cells and ensures early development is achieved.
it attaches to certain parts of the DNA and the activity of some genes are controlled. It is silenced in cells such as that of the skin which is why liver chromatin was found to be more dnase sensitive than the chromatin from skin cells.
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The Green Revolution was
characterized by
A. fewer fertilizers
B. lower yields
C. increased yields
D. very small amounts of chemical pesticides
The Green Revolution was characterized by C increased yields by providing large improvements in the food production sector.
How should the Green Revolution be described?Large improvements in food production in developing nations were a hallmark of the “green revolution,” which was brought on by increasing use of herbicides, fertilizers, and different crop varieties.
What does the Green Revolution increase?The introduction of new, high-yielding cultivars into developing countries, which started in the middle of the 20th century with Borlaug’s work, had a significant role in the Green Revolution’s increased the production of different kind of food grains (particularly wheat and rice).
What effects has the Green Revolution had on the fertilizer sector?The green revolution boosted the availability and use of fertilizers, weedicides, and insecticides to increase farm output and minimize crop loss or damage.
With the development of commercial farming, it also assisted in promoting agriculture throughout the nation.
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The population of Africa is increasing faster than any other continent. In addition, Africa is experiencing a "youth bulge." What is the MOST likely outcome if these trends continue?
A. There will be a larger workforce in Africa, improving their economies.
B. The economies in Africa will be challenged to support a growing population.
C. Countries in Africa will require greater healthcare resources.
D. Africa will become the leading producer of food and other resources.
Answer:
B. the economies in Africa will be challenged to support a growing population.
Explanation:
Just because Africa is increasing faster than any continent, doesn't mean its improving or going to improve. More children means more healthcare for families which is more expensive. And most of Africa's population are in Stage 1. (Below Poverty, less than $1.10 a day). Most Africans don't make it past 64 years.
A line of mutated yeast cells, called wee mutants, has no mitochondria. Their name comes from the fact that these cells are very small compared to other yeast cells. Which energy-harvesting processes can wee mutants perform?.
Answer:
glycolysis and fermentation
Explanation:
Hope this helps.
The map shows the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa.
The best explains the relationship between HbS allele frequency and malaria endemicity in Africa is when an area is malaria free, the HbS allele frequency is between 0 and 2.02. The correct option is a.
What is sickled hemoglobin?Sickled hemoglobin is a genetic disease that changes the shape of hemoglobin cells from a circle to a sickle shape, which reduces their function and it causes hemoglobin disease in the person.
Malaria is caused by the anopheles mosquito. It causes fever and shivering of the body.
Therefore, the correct option is a. When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
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The question is incomplete. Your most probably complete question is given below:
Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?
When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.
When an area is malaria free, the HbS allele frequency is between 12.64 and 18.18.
When an area is holoendemic, the HbS allele frequency is between 0 and 0.51.
b) The diagram below shows part of the inner surface of this organ.
i) Name the structures labelled X on the diagram.
Explanation:
where is that diagram labeled x
If a cell has a large number of chloroplasts present, what is the most likely function of that cell?
respiration
transpiration
fermentation
Ophotosynthesis
If a cell has a large number of chloroplasts present, the most likely function of that cell is photosynthesis. The correct option is D.
What are chloroplast?"Chloroplast is an organelle that contains the photosynthetic pigment chlorophyll, which captures sunlight and converts it into useful energy, allowing oxygen to be released from water."
They are in charge of photosynthesis, which is the process of converting light energy into sugar and other organic molecules that plants and algae use as food.
They also produce amino acids and lipids, which are required for the production of chloroplast membranes.
Thus, the correct option is D.
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how does the cytoplasm of an egg cell adapted to its function
Can someone answer this question with proper explanation please?
Answer: 0%
Explanation:
All children have half of their chromosomes, from mom, and half from dad. Because mom is homozygous, each of her children will have at least one dominant trait, which will completely cover the recessive trait form their dad. However the children will still be carriers of this syndrome
What did you include in your response?
The series of events that occurred in the endosymbiotic theory are as follows:
Both organelles were free-living prokaryotes ingested by primitive eukaryotic cells.Mitochondria and chloroplasts perform aerobic respiration; the host cell provides organic compounds for ATP production.Eukaryotic cells contain mitochondria and chloroplasts, but these organelles function similar to bacterium, which are prokaryotes.What is the endosymbiotic theory?The endosymbiotic theory is theory that describes how eukaryotic cells arose from simple prokaryotic cells,
In the endosymbiotic theory, simple prokaryotic cells which developed abilities such as using oxygen as electron acceptor as well asthe ability to use carbon to produce food associted in a symbiotic relationship.
One prokaryotoc cell engulfed another prokaryotic cell with which it exists in a symbotic relationship with.
The engulfed cells became the organelles in eukaryotes such as mitochondria and chloroplast.
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Cual es la funcion principal de la meiosis?
Answer:
La meiosis es el proceso en el que las células se dividen por la mitad para reproducirse y crear células hermanas. Cada una de las células hermanas obtiene una parte de los cromosomas de la célula madre para reproducirse en el futuro.
The word hyper means "more." What does "natremia" refer to?
the free energy released by the blank reactions of blank is stored in blank. the energy released by its hydrolysis to blank and pi drives the blank reactions of blank, which synthesize the complex molecules. also, during hydrolysis in mechanical and transport work, blank is transformed into blank. in these transfers and transformations, some energy is lost as heat. all the reactions of a cell require enzymes, which ensure efficient cell function by binding substrates and blank activation energy, thus speeding up metabolic reactions.
The following paragraph about catabolic reaction can be completed below:
The free energy released by the exergonic reactions of exergonic is stored in exergonic. The energy released by its hydrolysis to exergonic and pi drives the exergonic reactions of exergonic, which synthesize the complex molecules.
Also, during hydrolysis in mechanical and transport work, catabolic pathways is transformed into catabolic pathways.
In these transfers and transformations, some energy is lost as heat.
All the reactions of a cell require enzymes, which ensure efficient cell function by binding substrates and catabolic pathways activation energy, thus speeding up metabolic reactions.
What is meant by catabolic reactions?Catabolic reactions refers to a type of metabolism which involves the breaking down of bigger molecules into smaller molecules.
So therefore, an exergonic reaction can simply be defined as those metabolic activities which occurs in the body by releasing or giving off energy.
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a chemical compound has been developed that disrupts the biological messages responsible for the later stages of embryonic development during the reproduction cycles of certain sea creatures. upon introduction into an area of the ocean, the compound spreads outwards and downwards, reaching an active depth of up to 20 feet. the inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since
The inventors of the compound are aiming primarily at offering it as a method for controlling the numbers of jellyfish although this will clearly be unsuccessful since shortly after fertilization jellyfish, and larvae become plant-like polyps, which rooted to the sea floor, facilitating budding, and the final release of offspring.
The informal popular names for the medusa-phase of several gelatinous members of the subphylum Medusozoa, a significant division of the phylum Cnidaria, are jellyfish and sea jellies. Many varieties of jellyfish are largely safe for people to consume. Others have the capacity to produce extreme discomfort and systemic response.
When jellyfish are stuck to coastal reefs, they are in the stalked (polyp) phase. When they are in the jellyfish (medusa) phase, they are floating among the plankton. The medusa is in the reproductive stage; its eggs undergo internal fertilization and grow into larval planulae that may swim freely.
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What factors describe aquatic ecosystems?
Answer: Light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth.
Explanation: For aquatic ecosystems, these factors include light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth. Light level is an important factor in aquatic ecosystems.
Describe how a jaw breaker can be used to explain the Life cycle of a Star
Answer: Stars have diffrent layers
Could someone help me with this, please?
The carbon cycle depicts the movement of carbon on Earth in its elemental and combined states. Carbon exists as carbonates in minerals and as carbon dioxide gas in the atmosphere in its combined state as diamond and graphite.
What are the steps in the carbon cycle?Plants absorb carbon from the atmosphere in order to perform photosynthesis.Humans consume the oxygen released by plants and emit carbon dioxide through respiration.Animals consume these plants, and carbon is bioaccumulated in their bodies.When these animals and plants die, carbon is released back into the atmosphere as they decompose.Some of the carbon that is not re-emitted into the atmosphere is converted into fossil fuels.These fossil fuels are then used for man-made activities that release additional carbon into the atmosphere.To learn more about carbon cycle refer to :
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Which of the following is not part of the cell theory?
A. All cells come from other cells.
B. All cells are eukaryotic.
C. All living things are made of one or more cells.
D. Cells are the basic unit of living things.
Answer:
B. All cells of eukaryotic.
Explanation:
Eukaryotic means: An organism with more than 1 cell.
A cell is cannot have multiple cells within it, and if you read the cell theory it doesn´t mention B.
treated sewage is free of what contaminants
a. medical
b. nutrient
c. biological
d. all