which organelle controls what goes in and out of the cell?
Answers
The cell membrane distinguishes between the internal and external components of the cell.
It protects a cell's integrity and regulates the flow of materials into and out of the cell. For the required exchange, all components inside a cell must have access to the cell membrane (the cell's boundary). A double layer of phospholipid molecules makes up the cell membrane. The cell membrane's proteins serve as structural reinforcement, material-passage channels, receptor sites, transport molecules, and identification marks. The control centre of the cell is the nucleus, which is made up of a nuclear membrane enclosing fluid nucleoplasm. Deoxyribonucleic acid (DNA), the cell's genetic material, is found in chromatin threads in the nucleus.
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Related Questions
which type of microtubule is responsible for the elongation of the cell in anaphase b?
Answers
10. DNA can best be compared to
O the bricks that make up a building.
O an instruction manual.
the people that live in a building.
O the different apartments and offices in a building.
Answers
Answer:
An instruction manual because DNA is what determines everything about you
DNA can best be compared to an instruction manual. Thus, the correct option for this question is B.
What is DNA?DNA stands for Deoxyribonucleic acid. It may be characterized as a type of molecule that is generally present inside cells and contains the genetic information which is ultimately responsible for the development and function of an organism.
The molecules of DNA allow this information to be passed from one generation to the next. According to the question, as DNA represents each and every piece of information about an organism, similarly an instruction manual describe all the processes and function of any object or thing.
Therefore, DNA can best be compared to an instruction manual. Thus, the correct option for this question is B.
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What happens if a species is unable to adapt to a changing environment?
A)Its population stays constant.
B)Its population fluctuates.
C)Its population increases.
D)Its population decreases.
Answers
Answer:
D its population decreases
Explanation:
since a species cannot adapt they most probobly loose population
Answer:
Its population decreases.
Explanation:
Select the correct answer. According to Newton’s law of universal gravitation, what is the effect of gravity on two objects as the distance between them increases? A. The force of gravity increases. B. The force increases by twice the previous amount. C. There is no effect on the force of gravity. D. The force of gravity decreases.
Answers
C
Explanation:
Newton's first law state that every object in the universe will remain in the state of rest or uniform motion in a straight line
Answer: D. The force of gravity decreases
Explanation:
Where do each of the elements (letters) in glucose comes from during the process of photosynthesis.
Answers
Answer: From carbon dioxide and water
Explanation:
Glucose is a type of carbohydrate which is produced as a product of the biochemical reaction that is photosynthesis. Carbon dioxide and water are the reactants used for the synthesis of glucose. The carbon dioxide is obtained from the atmosphere and water from the roots. Carbon, hydrogen, and oxygen are the elements that are present in the carbohydrate through reactants named carbon dioxide and water.
In eye donation which part of the donor’s eye is utilised:
Answers
Answer: Cornea
Explanation:
During eye donation, mostly the whole eye ball is donated. If that the most important part is the cornea(front transparent part of eye). Cornea is the part which is transplanted. The rest of the eyeball is rarely used. In some places, during eye donation only cornea is collected. NEED FOR EYE DONATION .
True or False
The constants are analogous to the contestants of a sporting event
Answers
Answer:
True
Explanation:
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Are Vitamins nutrients not made by living things?
Answers
Answer:
Yes,Vitamins nutritions are made by living things.
25 points if you answer this. Genetic drift and natural selection can both be mechanisms of evolution. However, they are very different mechanisms.
Explain how genetic drift is different from natural selection.
Answers
Help me with this please
Answers
Answer:
how do u wake up so early . cause i can't do that
Explanation:
Looking at the model above, if the hawks are increased, what will happen to the
grass? Please explain your reasoning
Answers
If the hawks are increased in this model, the grass will increase in the food chain.
What is food pyramid?
The model that we can see in the question can eb seen to represent a food pyramid with some organisms at the apex and some underneath.
This is referred to as the series of exchanges of food-based substance and energy from one creature to another.
The main consumers, those that eat the grass, will decline as hawk populations rise. Therefore, there will be more grass because of this.
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If temperature increases, then the dew point will increase/decrease.
Answers
Which phrase best describes the need for ion channels?
ions must be able to interact with the charged regions of the cell membrane
o ions need to be sheltered from interacting with the charged regions of the cell membrane
Oso nutrients may enter the cell
O so nutrients may exit the cell
Answers
Ion channels are specialized proteins in the plasma membrane that provide a passageway through which charged ions can cross the plasma membrane down their electrochemical gradient. The resulting ionic current, generated by the movement of charged ions through membrane channels, can be measured by patch-clamp methods.
Ion channels must be able to interact with the charged regions of the cell membrane so nutrients can enter the cell.
What are ion channels?
Ion channels are passages in the cell membrane that allow the passage of charged molecules such as
Sodium: Na+Potassium: K+Ions pass from one side to the other of the cell according to the electrochemical gradient. In other words, they go from a place with high concentration to one of low concentration. But to do this, they need to interact with the charged regions of the membrane, which are the ion channels.
Ions channels are one of the ways that nutrients enter the cell.
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Which of the dominant approaches to understanding addiction and drug abuse is also known as the disease model? the biological model the cultural model the humanist model the learning model
Answers
Biological model of the dominant approaches to understanding addiction and drug abuse is also known as the disease model. Its a biological system that mirrors a disease or shows same disease processes.
According to disease model theory of addiction " identification of drug seeking behavior as a compulsive rather than a conscious choice due to chemical changes in brain which happen with regular substances abuses.
There are three model of addiction - genetic theories , exposure theories ( includes biological and conditioning) and adaptation theories. This disease model describes an addiction as a disease with biological, neurological , genetic and environment sources of origin.
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describes the factor that drives the ecological footprint of a country
Answers
Responder:
Su huella ecológica depende de su cultura, la tecnología disponible para usted y las leyes y los límites relacionados con la regulación ambiental que establece su gobierno.
Explicación:
Su huella ecológica depende de su cultura, la tecnología disponible para usted y las leyes y los límites relacionados con la regulación ambiental que establece su gobierno. Su huella ecológica se ve afectada por la cantidad de tierra en la que vive, si conduce (cuánto conduce, cuál es el consumo de gasolina de su automóvil, cuáles son las leyes de emisiones en su país para los automóviles), qué alimentos come y dónde. de dónde vienen, de dónde viene su electricidad, y así sucesivamente. Por lo tanto, si vive en Suecia, donde hay un gran énfasis en la energía verde y una dependencia comparativamente baja de los combustibles fósiles, su huella se verá afectada por esto. Por el contrario, si vive en un país que aún se está desarrollando económicamente en términos de tecnología, donde la mayoría de las personas no tienen acceso a automóviles ni electricidad, su huella será menor que la de aquellos que tienen acceso regular a viajes aéreos, automóviles , electricidad, etc. Otro factor a considerar son las regulaciones gubernamentales. Si su gobierno establece que la contaminación de las fábricas y los automóviles debe cumplir con un cierto estándar, eso significará que cualquier automóvil que compre o la fábrica en la que trabaje o compre productos tendrá una huella menor que sin estos estándares gubernamentales. Esto reducirá su huella. Por último, la cultura en la que vive, cuánto valor se le da a ser verde y a la conservación, probablemente tendrá un impacto en usted. Si creces en un hogar donde el reciclaje y el compostaje son la norma y tu familia y amigos andan en bicicleta en todos los lugares posibles, esto es muy diferente de crecer en un lugar donde conducir es un símbolo de riqueza y prestigio. Yale tiene un sitio realmente excelente donde puede ver el desempeño ambiental de los países en función de sus prácticas agrícolas, recursos hídricos, clima y energía, y más.
Growing food in ways which minimize water and fertilizer use and protect biodiversity while enhancing farmers' livelihoods is an example of: Sustainable sourcing Global sourcing Sole sourcing Ethical sourcing
Answers
Growing food in ways which minimize water and fertilizer use and protect biodiversity while enhancing farmers' livelihoods is an example of sustainable sourcing.
Sustainable sourcing is the practice of procuring goods and services in a manner that preserves and improves the natural environment, social welfare, and economic well-being of current and future generations. The process of sustainable sourcing ensures that the procurement of products and services is completed in a way that minimizes any negative impact on the environment.
Additionally, sustainable sourcing also seeks to support social and economic development and protect the human rights of all parties involved. The use of sustainable sourcing practices is vital for addressing some of the most pressing environmental and social challenges facing the world today, including deforestation, greenhouse gas emissions, and water scarcity. It is also crucial for ensuring the availability of resources for future generations.
Therefore, sustainable sourcing is a critical component of many companies' corporate social responsibility (CSR) programs.
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The circulatory system involved blood transporting items throughout the body ? What are some of the items that blood need to transport
Answers
white blood cells and red blood cells.......... please awnser my question about the gift shop
______ is also common at both divergent and convergent plate
boundaries
Answers
Looking at it we need the words that you can have but if it the place it commonly occurs at, I think it would be mid-oceanic ranges.
Where did the scientists who contributed to our scientific knowledge live?
Answers
genetic conditions caused by an unexpected (or abnormal) number of chromosomes, like down syndrome or an unexpected combination of sex chromosomes (xxy, xxy, and xo) are known as
Answers
Genetic conditions caused by an unexpected (or abnormal) number of chromosomes, such as Down syndrome or an unexpected combination of sex chromosomes (XXY, XYY, and XO), are known as chromosomal abnormalities.
What is a chromosomal abnormality?
A chromosomal abnormality is a kind of genetic disease that results from an atypical number or structure of chromosomes in the body's cells. In most circumstances, individuals with chromosomal abnormalities have 46 chromosomes in each of their cells, with two chromosomes inherited from each parent. However, some people have an extra chromosome or are missing one of them. Some chromosomal abnormalities are heritable, while others occur spontaneously.A chromosomal abnormality might occur in an entire chromosome or a small section of it. It may also entail an entire set of chromosomes. Chromosomal abnormalities can cause a variety of diseases, syndromes, and other health issues, ranging from mild to severe. Down syndrome is one of the most well-known chromosomal abnormalities.
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Using the graphic provided, identify the products of photosynthesis.
t
A)
sunlight oxygen, water
ng
59
B)
sugar (glucose), oxygen
Is
sunlight, water, carbon dioxide
som
D)
sunlight, carbon dioxide, water
Answers
The products of photosynthesis are B) sugar (glucose), oxygen.
What is photosynthesis?Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.
The balanced chemical equation for photosynthesis is:
6 CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6 O₂
Which are the products of photosynthesis?
A) sunlight, oxygen, water. NO, since water is a reactant and sunlight is the energy used.B) sugar (glucose), oxygen. YES.C) sunlight, water, carbon dioxide. NO, these are on the reactants' side.D) sunlight, carbon dioxide, water. NO, these are on the reactants' side.The products of photosynthesis are B) sugar (glucose), oxygen.
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How do you interpret air masses on a weather map?
Answers
In general, air masses with warmer temperatures and higher humidity are depicted by red symbols, while air masses with colder temperatures and lower humidity are represented by blue symbols. There are four main air masses that are commonly labeled on weather maps, which include:
1) Arctic (A) - very cold and dry air that originates from the Arctic or polar regions.
2) Continental (c) - dry air that forms over landmasses.
3) Maritime (m) - moist air that forms over oceans or seas.
4) Tropical (T) - warm and humid air that forms near the equator.
Air masses can also be classified based on their source region, which is the area where they originate and acquire their temperature and moisture content. By analyzing the source region of an air mass, meteorologists can determine its likely weather patterns and track its movement across different regions.
Interpreting air masses on a weather map is essential to predicting local weather conditions and understanding how different atmospheric conditions interact with each other to impact weather patterns.
write a letter to your parents about your school
Answers
Dear Mom and Dad,
I hope this letter finds both of you in good health and high spirits. I wanted to take a moment to tell you about my school and the wonderful experiences I have been having here.
First and foremost, I want to express my gratitude to both of you for the opportunity to attend such a remarkable institution. The education I am receiving at this school is truly top-notch, and I feel fortunate to be a part of it.
The teachers here are passionate, knowledgeable, and dedicated to our growth and development. They go above and beyond to ensure that we receive a well-rounded education that prepares us for the future.
One of the aspects that I appreciate the most about my school is the diverse range of subjects and extracurricular activities available. I have been able to explore my interests in various fields, from science and mathematics to literature and the arts.
The school offers a multitude of clubs, sports teams, and cultural activities, allowing me to engage in activities that I am passionate about and develop new skills. It's been a joy to meet like-minded individuals who share my enthusiasm and curiosity.
Moreover, the school fosters a warm and inclusive community. The friendships I have made here are invaluable, and the support I receive from my peers and teachers is truly remarkable. The school encourages collaboration, teamwork, and respect for one another, creating a positive and nurturing environment that enhances our learning experience.
Lastly, the school places a strong emphasis on community service and social responsibility. We are encouraged to participate in various community outreach programs, charity events, and environmental initiatives.
In conclusion, I am truly grateful for the opportunities and experiences my school provides. I feel supported, challenged, and inspired every day.Thank you both for your unwavering support and belief in me. I am excited to continue this journey of learning and growth.
With all my love,
[Your Name]
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Q9. A person who is heterozygous for the cystic fibrosis allele moves to a small, isolated community where no one previously carried the allele. If the cystic fibrosis allele protects against tuberculosis the same way the sickle-cell allele protects against malaria, what should happen to the frequency of the cystic fibrosis allele in the community over time, and why? The cystic fibrosis allele should disappear from the population, because a single individual with the allele is not enough for it to proliferate. The cystic fibrosis allele should increase to a relatively high frequency, because heterozygotes with the allele will be more likely to survive than others. The cystic fibrosis allele should become fixed in the population, due to genetic drift. The cystic fibrosis allele should either disappear or increase in frequency, depending on chance as well as on tuberculosis prevalence and death rate. Use the following additional passage to answer the next question. Suppose you travel to the future, to a time when neither cystic fibrosis nor tuberculosis have caused any deaths for many generations. In all of these future populations, the cystic fibrosis allele still exists at a low frequency. Q10. You visit a huge city with millions of people. If you were to start sampling the cystic fibrosis allele from one generation to the next, what should happen to its frequency over the next few generations, and why? The allele frequency should change a lot from one generation to the next due to random genetic drift. The allele frequency should not change much from one generation to the next because the population is large. The allele frequency should steadily increase due to natural selection. The allele frequency should steadily decrease due to natural selection.
Answers
The cystic fibrosis allele should grow more prevalent because heterozygotes bearing the gene will live longer than other heterozygotes.
Cystic fibrosis is a genetic disorder caused by mutations in the CFTR gene, which affects the function of cells that produce mucus, sweat, and digestive juices.
Heterozygotes with one copy of the CFTR allele are generally healthy and don't show symptoms of the disease, but those with two copies of the allele will develop cystic fibrosis.
The passage states that the cystic fibrosis allele protects against tuberculosis, which means that heterozygotes with one copy of the allele will be more resistant to the disease and more likely to survive and reproduce than others. This will increase the frequency of the cystic fibrosis allele in the population over time.
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What substance is used to make up nerve fibre
Answers
Answer:Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.
Explanation:
The sun is a significant factor that helps to support life. Which of the following earht-sun relationship is not true.
A) The sun’s gravity keeps Earth from flying off into space
B) Earth is the 4th planet from the sun, which is a perfect distance to utilize the sun’s energy.
C) The Sun is key to dynamic processes on Earth, like weather, climate, and cycling of water.
D) If earth were any further from the Sun, more ice would form reflecting more heat and making the planet similar to Mars.
Answers
Answer:
D
Explanation:
I know FOR SURE that A, B, and C are correct, so D isn't
what structural features of alveoli make them an ideal place for gas exchange
Answers
The structural features of alveoli make them an ideal place for gas exchange due to their large surface area and thin walls.
Alveoli are tiny, balloon-like structures found in the lungs. They are surrounded by an extensive network of capillaries, where the exchange of gases takes place. The large number of alveoli in the lungs provides a significantly large surface area for gas exchange to occur. This increased surface area allows for a greater amount of oxygen to diffuse into the bloodstream and carbon dioxide to be removed efficiently. Furthermore, the walls of the alveoli are extremely thin, consisting of a single layer of epithelial cells. This thinness enables gases to diffuse quickly across the alveolar membrane. The close proximity of the alveolar walls to the capillaries allows for a short diffusion distance, ensuring a rapid exchange of gases. Overall, the combination of the large surface area and thin walls of alveoli maximizes the efficiency of gas exchange in the lungs, facilitating the uptake of oxygen and the removal of carbon dioxide from the bloodstream. This ensures an adequate oxygen supply for cellular respiration and the elimination of waste gases produced by metabolic processes.
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Which is biotic?
water
temperature
beeswax
rocks
Answers
Answer: The answer would be beeswax
Explanation:
This is because a biotic factor is something that is alive, was living, or came from something living.
Answer:
C.
Explanation:
Give a marine mammal example of a) sympatric,b) allopatric and c) peripatric speciation. Make sure that you define each of these terms in your answer.
Answers
The development of new species within the same geographic region is referred to as sympatric speciation. The orca, often known as the killer whale, is a prime example of sympatric speciation in marine mammals.
At least three distinct ecotypes of orcas have been found by scientists; each has different dietary patterns, social structures, and vocalizations. These ecotypes may indicate several stages of speciation due to their significant genetic and physical features.
Geographic isolation causes new species to emerge through a process known as allopatric speciation. The walrus is one species of marine animal that underwent allopatric. The Atlantic and Pacific walruses are two recognized subspecies of the walrus.
Peripatric speciation, which occurs when a small population separates from a larger population and experiences a rapid genetic shift, is the process through which new species are created. The Hawaiian monk seal, a marine mammal, is a prime example of peripatric speciation.
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Give several reasons why nutrition has become a national concern.
Answers
Answer: A healthy diet prevents malnutrition and protects from diseases like obesity, heart disease, diabetes, cancer and stroke. Today, many people's diets consist of more saturated fat, trans fats, sugars, and more sodium than fruits, vegetables and dietary fiber. Your body's health reflects what you put into it.