¿Qué estructuras y organelas son exclusivas de las células eucariotas vegetales?, ¿cuáles son las funciones de cada una?
Answers
Answer:
Las estructuras y organelas que son exclusivas de las células eucariotas vegetales son: la pared celular, los cloroplastos, las vacuolas y los plastidios. Cada una de estas estructuras tiene distintas funciones.
Explanation:
Las células eucariotas vegetales tienen otro tipo de estructuras y organelas ya que tienen otro tipo de procesos, entre los cuales se encuentra la fotosíntesis.
Funciones:
Pared Celular: protege la membrana plasmática y toda la estructura celular. Tiene plasmodesmos a través de los cuales ingresan sustancias.
Vacuolas: almacenan sales, agua y productos residuales
Plastidios: le dan distintas características a las plantas. Algunos almacenan sustancias, otros definen su color.
Cloroplastos: son un tipo de plastidios y tienen un pigmento llamado clorofila.
Related Questions
Helpppp PLS FAST I will mark as brainlist!
How can air plants help us cobalt real life problems ?
Answers
what part of the food chain is a snowshoe hare? (select all that apply)
1. secondary consumer
2. producer
3. primary consumer
4. pray
Answers
Hope this helped :)
Answer:
The answer will be primary consumer because it is the first animal to eat the producer
Explanation:
It couldn’t be secondary consumer because that would eat the primary consumer
Pray is not a part of the food chain language (I never learned about it in food chain)
Producer wel you know makes its own food
:)
Look at the protein below. Label the diagram on the right and show which part of the protein had hydrophobic amino acid residues and what part of the protein has hydrophilic amino acid residues. Explain how you know.
Answers
The tertiary structure of proteins provides them with a more stable shape. The hydrophilic amino acids remain on the surface of the folded protein, while the hydrophobic ones stay in the center of the molecule, isolated from water.
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Proteins are amino acid polymers linearly arranged and connected by peptidic bonds. These molecules characterize by their different structures.
Amino acids are organic molecules composed of
a central carbon, one hydrogen atom, one carboxyl group, one amine group, and one R group.The composition of the R group is what makes them different from each other.
Twenty amino acids compose the different proteins. Some of them are non-polar.
When amino acids are non-polar, their R-groups are not stable in contact with water, meaning that non-polar amino acids are hydrophobic. Their lateral chains have almost entirely C-C and C-H bonds. These amino acids are alanine, valine, leucine, isoleucine, methionine, tyrosine, phenylalanine, tryptophan.
The hydrophilic amino acids can associate with water. Among them, we can find arginine, glycine, glutamine, asparagine, histidine, aspartic acid, glutamic acid.
When proteins are synthesized, they acquire a three-dimensional structure that makes them more stable.
Lineal polypeptides get folded and, by different types of bonds, they acquire a shape that makes them more stable.
The tertiary structure makes them capable of accomplishing their biological roles.
In an aqueous environment, the folded molecule exhibits its hydrophilic R-groups on the surface in contact with water while its hydrophobic groups remain in the structure interior.
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according to steinbock, how does a patient’s right to refuse treatment serve as an objection to tooley and rachels?
Answers
Steinbock argues that a patient's right to refuse treatment undermines Tooley and Rachels' argument because it shows that individuals strongly prefer avoiding being killed, even if it means foregoing treatment.
If individuals value their own lives so highly that they are willing to forgo treatment to preserve them, then it suggests that there is something uniquely valuable about their lives that is lost when they are killed.
This objection challenges Tooley and Rachels' claim that the value of human life is solely derived from the experiences that it affords.
Whether or not this objection is good depends on one's view of the value of human life. If one agrees with Steinbock that there is something inherently valuable about human life that cannot be reduced to its experiences, then the right to refuse treatment serves as a strong objection to Tooley and Rachels' argument.
However, if one believes that the value of human life is solely derived from the experiences that it affords, then the right to refuse treatment may not be as compelling of an objection.
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Steinbock argues that a patient's right to refuse treatment undermines Tooley and Rachels' argument because it shows that individuals strongly prefer avoiding being killed, even if it means foregoing treatment.
If individuals value their own lives so highly that they are willing to forgo treatment to preserve them, then it suggests that there is something uniquely valuable about their lives that is lost when they are killed.
This objection challenges Tooley and Rachels' claim that the value of human life is solely derived from the experiences that it affords.
Whether or not this objection is good depends on one's view of the value of human life. If one agrees with Steinbock that there is something inherently valuable about human life that cannot be reduced to its experiences, then the right to refuse treatment serves as a strong objection to Tooley and Rachels' argument.
However, if one believes that the value of human life is solely derived from the experiences that it affords, then the right to refuse treatment may not be as compelling of an objection.
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these rnas are called noncoding rnas. read carefully to discern a crucial role played by these ncrnas. what is this role
Answers
The transcriptional and post-transcriptional levels of gene expression are both regulated by non-coding RNAs (ncRNAs). There is proof that some non-coding RNAs (ncRNAs) participate in epigenetic processes.
The term "non-coding RNA" refers to which RNA?Abstract. Although RNA that does not encode a protein is often referred to as a non-coding RNA (ncRNA), this does not imply that such RNAs lack information or function.
Which three main categories of non-coding RNA exist?The three main categories of short non-coding RNAs (small ncRNAs) are microRNAs (miRNA), small interfering RNAs (siRNAs), and piwi-interacting RNAs (piRNAs).
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Explain the similarities and differences between substitutions, insertions, and deletions
Answers
Answer:
Substitutions, insertions, and deletions are types of genetic mutations that can occur in DNA or RNA sequences.
A substitution, also known as a point mutation, is a change in a single nucleotide base pair in the DNA or RNA sequence. There are three types of substitutions: silent, missense, and nonsense mutations. A silent mutation is a substitution that does not result in a change in the amino acid sequence of the protein that is produced. A missense mutation is a substitution that does result in a change in the amino acid sequence, potentially affecting the function of the protein. A nonsense mutation is a substitution that creates a premature stop codon, resulting in a truncated protein.
An insertion mutation occurs when one or more nucleotide base pairs are added to the DNA or RNA sequence, causing a shift in the reading frame. This can result in a frameshift mutation, which changes the way the entire sequence is read and can affect the protein produced.
A deletion mutation occurs when one or more nucleotide base pairs are removed from the DNA or RNA sequence, also causing a frameshift mutation. Like an insertion, a deletion can affect the protein produced, depending on where in the sequence it occurs.
In summary, substitutions, insertions, and deletions are all types of genetic mutations that can occur in DNA or RNA sequences. Substitutions involve a change in a single nucleotide base pair, while insertions and deletions involve the addition or removal of one or more base pairs, respectively. Insertions and deletions can result in a frameshift mutation, which changes the reading frame of the sequence and can have significant effects on the protein produced.
Explanation:
Identify the main gas that diffuses from the alveolus to the capillary.
Answers
Answer:
oxygen
Explanation:
Astrocytes carrying the superoxide dismutase 1 (SOD1G93A) mutation induce wild-type motor neuron degeneration in vivo.
Answers
As "nurse" cells for neurons in the brain parenchyma, astrocytes are resident glial cells produced from neuroectoderm.
How astrocytes become pathological?
Recent research has identified astrocytes as major disease-propagating agents in mutant human superoxide dismutase 1 (mSOD1)-mediated amyotrophic lateral sclerosis (ALS). However, due to the widespread expression of mSOD1 throughout the CNS of the investigated rodent models, in vivo examination of a specific astrocytic effect in amyotrophic lateral sclerosis has proven challenging. In order to understand how mutant astrocytes affect WT MNs and other cell types (microglia and astrocytes) in an in vivo environment, we transplanted SOD1(G93A) glial-restricted precursor cells into the cervical spinal cord of WT rats. SOD1(G93A) glial-restricted progenitor cells that were transplanted survived and successfully differentiated into astrocytes.Learn more about the Astrocytes with the help of the given link:
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Segments of ________ transferred from parent to offspring are called genes.
Answers
Answer:
DNA
Explanation:
the parent's DNA are in the genes so when they get transferred, their offspring receives them.
Answer:
DNA
Explanation:
BTS
how do human activities negatively affect biodiversity choose the three that apply
A. Introducing invasive species
B. Growing trees in deforested regions
C. Enacting captive breeding programs
D. Removing natural resources
E. Adding carbon dioxide to the atmosphere
Answers
Answer:
A
D
E
I did this on edge
that guy with a purple shirt and tie looks a little young to be teaching lol
Explanation:
What is the fundamental source of energy in the food you eat?
A.sun
B.sugar
C.photosynthesis
D.plants
Answers
Answer:
sun is the source of energy
It is sun.
Explanation:
As here we are talking about the fundamental source of energy in the food that we eat. As we all know that photosynthesis process or any thing is impossible without sun .So, sun is the fundamental source of energy in the food we eat..
During which process do cells change chemical energy into something usable?.
Answers
The process that cells change chemical energy into something usable is cellular respiration. The remaining steps occur in the mitochondria.
Cellular respiration is the process by which cells transform the energy stored in glucose into a form that can be used by the cell. Cellular respiration produces the energy molecule ATP (adenosine triphosphate), which powers the cell's metabolic activities. The chemical energy stored in glucose is converted into ATP by the process of cellular respiration, which takes place in the mitochondria of the cell.
During glycolysis, glucose is broken down into pyruvate. Pyruvate then enters the Krebs cycle, where it is converted into carbon dioxide and water. The electron transport chain then converts the energy produced in the Krebs cycle into ATP. Overall, cellular respiration is a critical process for cells as it provides the energy needed to power metabolic activities. Without cellular respiration, cells would not be able to function properly.
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The transfer of energy from one organism to the other is known as a ________________. a consumer b food web c energy pyrimid or d food chain
Answers
Answer:
I think it's C. and energy pyramid. but I'm not so sure...
Explanation:
The first commercial airline flight flew over what body of water?.
Answers
The first commercial airline flight flew over Tampa Bay, a large body of water in Florida.
The inaugural commercial airline flight took place on January 1, 1914, and flew over Tampa Bay in Florida. This historic event marked the beginning of the commercial aviation industry. The aircraft used was a Benoist XIV airboat, piloted by Tony Jannus. The flight carried a single passenger, the former mayor of St. Petersburg, Abram C. Pheil, who had won an auction for the privilege to be the first passenger. The journey began in St. Petersburg and ended in Tampa, covering a distance of approximately 23 miles in just 23 minutes. This breakthrough in transportation revolutionized travel and led to the growth and development of the modern-day aviation industry we know today.
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The exchange of genetic information takes place during this phase of cell division: a) metaphase b) prophase c) anaphase d) telophase
Answers
The exchange of genetic information takes place during the prophase phase of cell division.
The correct option is b) prophase
Prophase is the stage where the chromatin condenses into visible chromosomes, and the nuclear membrane breaks down. During this stage, the genetic material is replicated, and the chromosomes pair up, forming a structure called a tetrad. It is during this pairing that crossing-over can occur, where genetic information is exchanged between homologous chromosomes. This process creates genetic diversity and ensures that each offspring is unique. After prophase, the cell progresses through the metaphase, anaphase, and telophase stages, where the chromosomes align, separate, and move to opposite poles of the cell before ultimately dividing into two daughter cells. In summary, prophase is a crucial phase of cell division where genetic information is replicated and exchanged, leading to diversity in offspring.
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what causes the level of atmospheric co2 to rise and fall throughout the year a. temperature flunctuations b. movement of ocean air streams c. relative distance of earth to the sun d. plant growth and dormancy due to seasons
Answers
The primary cause of the fluctuation in atmospheric \(CO_2\) levels throughout the year is plant growth and dormancy due to seasonal changes (option d).
During the growing season, plants absorb \(CO_2\) from the atmosphere for photosynthesis, which reduces the concentration of atmospheric \(CO_2\). Conversely, during the dormant season, the rate of photosynthesis decreases, and plants release \(CO_2\) back into the atmosphere through respiration and decomposition.
Temperature fluctuations (option a) also influence the \(CO_2\) levels, as warmer temperatures can accelerate plant growth, enhance microbial decomposition of organic matter, and increase the solubility of \(CO_2\) in the ocean. However, this effect is secondary to the influence of plant growth and dormancy.
The movement of ocean air streams (option b) and the relative distance of Earth to the Sun (option c) can indirectly affect atmospheric \(CO_2\) levels. Ocean currents can transport and redistribute \(CO_2\) in the form of dissolved inorganic carbon, which can then be exchanged with the atmosphere. The distance of Earth to the Sun affects the intensity of solar radiation received, influencing the Earth's climate and, subsequently, the distribution of plant growth and \(CO_2\) absorption.
In summary, the primary driver of atmospheric \(CO_2\) fluctuations throughout the year is plant growth and dormancy due to seasonal changes, while temperature fluctuations, ocean air streams, and Earth's distance from the Sun play secondary roles in this process.
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The graphs above show a change in distribution of beak phenotypes X, Y, and Z over 10 generations. Notice that Beak X completely disappears from the population by Generation 5, but reappears by Generation 10. Could this occur in nature? How?
Answers
A, Yes, the alleles for Beak X could remain in the population as a recessive gene.
What is the rationale behind it?Recessive genes. The alleles for beak X could remain in the population as recessive genes. This means that birds with beak X would still be able to pass on the genes for beak X to their offspring, even if they themselves did not have beak X. If two birds with the recessive gene for beak X mated, their offspring would have a 25% chance of having beak X.
Mutation. The birds could mutate their beaks in response to a change in the environment. This could lead to the appearance of beak X, even if the gene for beak X was not present in the population before.
Random chance. Genetic mutation is so frequent that it is possible for beak X to reappear randomly by generation 10. This is especially likely if the environment is changing and there is a selective advantage for birds with beak X.
In conclusion, it is possible for beak X to reappear after 5 generations in nature. This could happen through the inheritance of recessive genes, mutation, or random chance.
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Complete question:
The graphs above show a change in distribution of beak phenotype X, Y, and Z over 10 generations. Notice that Beak X completely disappears from the population by Generation 5, but reappears by Generation 10. Could this occur in nature? How?
Yes, the alleles for Beak X could remain in the population as a recessive gene.
Yes, the birds could mutate their beaks in response to a change in the environment.
Yes, genetic mutation is so frequent that Beak X will likely reappear randomly by Generation 10.
No, once birds with Beak X are extinct, they cannot appear again.
During exercise, sensory receptors detect changes in oxygen and carbon dioxide levels in the blood. This information is then sent to the brain's medulla, which causes the heart to beat faster and increases the rate of breathing. Exercising also causes the nervous system to signal the pancreas and thyroid gland to release hormones which regulate metabolism. Which statement is best demonstrated by this scenario? A. Hormones act as signal molecules between all body systems. B. Exercise is important for the body to function properly. C. Nerves transmit and respond to every major system in the body. D. Increased heart rate and blood flow decrease oxygen supply.
Answers
A. Hormones act as signal molecules between all body systems
Peripheral Chemoreceptors (Carotid + Aortic Bodies) and Central Chemoreceptors in the Medulla Oblongata detect high Carbon Dioxide levels in the blood during exercise. The respiratory centre in the Medulla Oblongata + PONS stimulate the intercostal muscles and the diphragm to contract in order to increase the rate and depth of breathing as to decrease levels of Carbon dioxide in the blood.
The thyroid gland secretes thyroxine which speeds up metabolism (the rate at which cells use glucose)
Answer:
B. Nerves transmit and respond to every major system in the body.
Explanation:
The turning on of a gene to make rna and eventually protein is known as gene _________?.
Answers
Answer:
The process of turning on a gene to produce RNA and protein is called gene expression.
Explanation:
What vaccinations are given to cattle?
I need this ASAP....
Answers
Answer:
Clostridial diseases
IBR (Infectious Bovine Rhinotracheitis)
BVD (Bovine Viral Diarrhea)
PI-3 (Parainfluenza 3 virus)
BRSV (Bovine Respiratory Syncytial Virus)
Pasteurella
Leptospirosis
Brucella
Explanation:
how do organisms with many cell types develop from a single cell
Answers
Organisms develop from a single cell into many cell types, which are organized into tissues and organs. During development, cells use both inherited info and external signals from neighbors to “decide on” their behavior and identity.
Cell division, torso axis formation, tissue and organ development are all part of development, and cell differentiation refers to acquiring a final cell type identity.
What is cell division?The process by which a parent cell divides into two daughter cells is known as cell division.
Cell division is usually part of a larger cell cycle during which the cell grows and replicates its chromosomes before dividing.
Cell division occurs in two stages: mitosis and meiosis. When most people say "cell division," they're referring to mitosis, the process of creating new body cells.
Meiosis is the process by which egg and sperm cells are formed. Mitosis is a necessary process for life.
Multicellular organisms form in a variety of ways, including cell division and the aggregation of many single cells. Colonial organisms form when many identical individuals band together to form a colony.
Thus, this way, organisms with many cell types develop from a single cell.
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Based on this diagram, which two systems interact to maintain homeostasis?
The nervous and reproductive systems work together to stimulate the production of insulin.
The circulatory and endocrine systems work together to keep blood sugar levels constant.
The excretory and nervous systems work together to convert glycogen into glucose.
The immune and circulatory systems work together to circulate blood through the pancreas.
Answers
Based on this diagram, the circulatory and endocrine systems work together to keep blood sugar levels constant to maintain homeostasis.
Homeostasis refers to the ability of an organism or cell to regulate and maintain its internal environment within tolerable limits. It is essential for the healthy functioning of an organism's systems and survival. The endocrine system is a system of glands that produces hormones that are secreted directly into the bloodstream to regulate body functions. It is responsible for regulating various bodily functions, including growth and development, metabolism, and mood. Hormones from the endocrine system are transported through the bloodstream to target organs and tissues, where they bind to specific receptors, triggering a response.
The circulatory system is responsible for transporting blood throughout the body. The heart pumps blood through a network of blood vessels that include arteries, veins, and capillaries. Blood carries nutrients, oxygen, and waste products between cells and tissues, and the circulatory system also helps to regulate body temperature and pH levels. The circulatory system is essential for homeostasis because it ensures that all cells and tissues receive the nutrients and oxygen they need to function properly.
The circulatory and endocrine systems work together to maintain homeostasis by regulating blood sugar levels. The endocrine system produces hormones such as insulin and glucagon, which regulate blood sugar levels by controlling the amount of glucose that is stored or released by cells. Insulin helps cells absorb glucose from the bloodstream when blood sugar levels are high, while glucagon helps release stored glucose from cells when blood sugar levels are low. The circulatory system helps to transport hormones throughout the body, ensuring that they reach their target cells and tissues. Together, these systems help to keep blood sugar levels constant, which is essential for maintaining homeostasis.
So, the correct answer is -The circulatory and endocrine systems work together to keep blood sugar levels constant.
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Select the correct location on the image.
Karla list the steps of her scientific analysis in the form of a flow chart. Which step should Karla go back to as a result of her conclusions?
Answers
answer is already correctly displayed in the photo
Answer:
1
Explanation:
The gastrocnemius originates on the ______________ and inserts on the calcaneus.
Answers
The correct answer is Medial and lateral epicondyles of the femur
What are Medial and lateral epicondyles of the femur?
The points of articulation and rotation on top of the tibial plateau are the medial and lateral distal condyles of the femur. Additionally, the femur possesses two epicondyles, one on its medial and one on its lateral surfaces. They are on a higher plane than the femoral condyles. Many muscles link to these bumps at these sites. The intercondylar fossa is located just beneath the slightly triangular and flat popliteal surface on the back of the femur near the knee. This tibial fossa, which is located across from the intercondylar eminences, allows for the passage of ligaments, nerves, and blood vessels.
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Suppose a country’s population is aging and the size of the workforce is declining. in the long run, output will ________ and the price level will ________.
Answers
In the long run, the output will reduce and the price level will increase because there is a low size of the workforce.
How are output and price levels affected?We know that production or output is dependent on the workforce. If a country has large workforce, then the production of the country is higher which make the economy better which results in the lower price of products while on the other hand, if a country has low workforce, then the output of the country is also lower that make the economy worse which results in the higher price of products and inflation.
So we can conclude that in the long run, the output will reduce and the price level will increase because there is a low size of the workforce.
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Organisms with __Heritable__ traits are able to reproduce and pass their traits on to their ___________________, who then reproduce.
Those without such favorable traits are more likely to________________ before reproducing.
Answers
Organisms with heritable traits are able to reproduce and pass their traits on to their offspring, who then reproduce. Those without such favorable traits are more likely to die or not survive as well before reproducing.
Natural selection, or survival of the fittest, is the process by which individuals with favorable characteristics survive and reproduce more often than those lacking such characteristics. Due to differences in reproductive success, this can lead to population growth over time as advantageous traits become more prevalent and unfavorable traits become less prevalent.
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Angela set out to determine how many genes control the length of people's
eyelashes. She compared the length of eyelashes from 100 different people.
To determine the length, she placed each eyelash next to an eyelash of
known length. She then estimated the difference in length.
What is a possible source of error in her experiment?
OA. She should have considered the number of eyelashes on each
eyelid in her data collection.
B. She did not collect data from enough people.
C. She may have had a difficult time making accurate measurements
by estimation.
D. She did not include a control group.
SUBMIT
Answers
She may have had a difficult time making accurate measurements by estimation. Therefore, option C is correct.
What are genes?Genes are segments of DNA that hold the instructions needed to create a single, usually protein-producing, molecule in your body. These proteins regulate how our body develops and functions; they are also in charge of determining many of our physical traits, like our eye color, blood type, and height.
There are different genes for different characters.
She may have had a difficult time making accurate measurements by estimation. Therefore, option C is correct.
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Gene flow between two populations __________ genetic variation between them.
Group of answer choices
requires
increases
has no effect on
decreases
Answers
Gene flow between two populations increases genetic variation between them. In the process of gene flow, alleles from one population move to another population, which causes genetic variation between the two populations.
When two populations are connected by gene flow, alleles move from one population to another. This will increase the genetic variation in the recipient population.
Gene flow helps to maintain genetic similarity and exchange genetic information between populations that are geographically isolated.
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In which two ways do these molecules fight pathogens in the body?
Answers
In the image, we can see antibodies with antigens attached.
The antibodies help us to fight pathogens by binding and recognizing pathogens (C and D), the binding can tag the pathogen to let know other cells of the immune system or it can directly deactivate the pathogen.
as temperature increases, enzyme activity ____________. however, if the temperature increases beyond a certain point, the rate of a reaction levels out and then rapidly declines because the enzyme becomes ____________
Answers
The statement "as temperature increases, enzyme activity increases" is true to an extent. This is because enzyme activity is highly dependent on temperature, with every enzyme having a specific optimum temperature range in which it works best.
However, if the temperature increases beyond a certain point, the rate of a reaction levels out and then rapidly declines because the enzyme becomes denatured. Enzyme activity is significantly affected by temperature changes. The rate of an enzyme-catalyzed reaction increases as the temperature rises until it reaches the optimum temperature, which varies for different enzymes. The optimum temperature range for enzymes is typically between 35°C and 40°C. At this temperature, enzyme activity is at its highest. However, if the temperature exceeds the optimum temperature range, the rate of reaction levels out and then rapidly declines because the enzyme becomes denatured.
In summary, This is due to the fact that enzymes are proteins that are highly sensitive to temperature changes. When an enzyme is denatured, it loses its shape and is no longer able to catalyze reactions effectively.
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