Answer: D
Explanation: They all do, but it is not a part of the Cell Theory
All cells must have a cell membrane statement is not a part of Cell Theory. So, the correct option is (D).
What is Cell?Cell is the smallest unit which can live on its own and makes up all living organisms and the tissues of the body. It has three main parts:
The cell membraneThe nucleusThe cytoplasmThe cell membrane surrounds the cell and also controls the substances which go into and out of the cell. They are the structural, functional, and biological units of all living beings.
Cells are of two types: They are
1. Eukaryotic cell
It contain a nucleus. It may be either single-celled or multicellular.
2. Prokaryotic cells
It do not have a nucleus, but a nucleoid region is still present. They are single-celled organisms.
There are two types of cells.
1. Animal cells
2. Plant cells
There are so many common things between them but they also have some differences like Animal cells contain centrosomes and lysosomes, while plant cells do not. Plant cells contain a cell wall, chloroplasts, plasmodesmata and plastids used for storage, and a large central vacuole, while animal cells do not.
Thus, all cells must have a cell membrane statement is not a part of Cell Theory. So, the correct option is (D).
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Identify which questions can be answered through science and which cannot. Should humans use biotechnology to bring extinct organisms from the fossil record back to life? Is it right or wrong to use genetic engineering to produce new food products? If a new gene is added to the genome of a tomato species, will that species be more resistant to insects? What are the most common social settings that tend to produce accomplished artists? Are Michelangelo's paintings more impressive than Rembrandt's? Do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world?
Let's number the questions to understand the question easily:
1. Should humans use biotechnology to bring extinct organisms from the fossil record back to life?
2. Is it right or wrong to use genetic engineering to produce new food products?
3. If a new gene is added to the genome of a tomato species, will that species be more resistant to insects?
4. What are the most common social settings that tend to produce accomplished artists?
5. Are Michelangelo's paintings more impressive than Rembrandt's?
6. Do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world?
Answer:
Science is defined as the study of the natural and social on the basis of evidence.
Questions are an important part of science that reveals several new findings of the natural world. Scientific questions are answered on the basis of true observations and investigation using several scientific tools and help people to believe the new finding.
The questions that can be answered through science are "1,2,3 and 6".
Questions that can not be answered through science are based on morals, values, and individual intelligence include question number "4 and 5".
Hence, question number "1,2,3, and 6" can be answered through science while question number "4 and 5" can not be answered through science.
What are the sides of the DNA molecule called
Answer:
Double helix, which is like a twisted ladder.
Explanation:
That's it!
what's intrinsic spin??( sr this suppose to be about physics)
Answer:
Explanation:
In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei. Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum.
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Relationship between activation energy and rate of reaction
The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.
Rhonda watched a video taken by a camera that was lifted into the upper atmosphere by a weather balloon. She saw the balloon pop when it reached a certain height. Afterward, Rhonda wondered what effect the the air pressure at high altitudes has on the volume of gas in balloons. What scientific practice is Rhonda preforming?
1. Asking a question
2. Proving explanations
3.communicating results
4.preforming an investigation
Answer:
Rhonda is asking a question.
Explanation:
She noticed that the balloon popped, so then she asked "What effect does high altitude air pressure have on the volume of gas in balloons?" This is her question.
Answer:
Its A or asking a question
Explanation:
can someone please help me label these parts of animal cell
12. The life-cycle theory of consumption can be summarized as
follows:
A) retired people need less so they can save more than working
people
B) people want instant gratification and seldom worry about
The life-cycle theory of consumption can be summarized as follows: people want instant gratification and seldom worry about the future. The correct option is (B).
This statement is incorrect. The life-cycle theory of consumption actually suggests the opposite. According to this theory, individuals adjust their consumption patterns over their lifetime to ensure a smooth and consistent level of consumption.
It recognizes that individuals have different income and expenditure patterns at different stages of their life.
The theory posits that individuals tend to save and accumulate wealth during their working years when their income is higher.
This allows them to maintain their consumption levels during retirement when their income typically decreases. Retired people are expected to draw from their accumulated savings to support their consumption needs.
In contrast, working individuals often have higher consumption needs due to various factors such as raising a family, paying off debts, and investing in education or housing.
They may have less disposable income available for saving during this phase of their life.
Therefore, the life-cycle theory of consumption suggests that retired people need to draw on their savings accumulated during their working years to support their consumption, and it emphasizes the importance of long-term financial planning and saving.
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most enzymes catalyze only one specific chemical reaction effectively. what feature of protein structure is most directly responsible for this specificity?
Enzymes are essential biological catalysts that play a crucial role in all biological processes. Most enzymes catalyze only one specific chemical reaction effectively.
The specificity of enzymes is due to their protein structure. The feature of the protein structure most directly responsible for this specificity is the active site.Active sites are small pockets or clefts in the enzyme protein that facilitate the chemical reaction of the enzyme.
This specificity of enzymes is what makes them vital for life processes. The ability of an enzyme to catalyze a particular reaction depends on the enzyme's unique active site, which is determined by the protein's primary structure.
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PLEASE IF ANSWER CORRECT WILL MARK BRAINLEST!!! Please due right now A car engine uses the combustion of fuel to move a system of gears that move its wheels. Not all of the fuel's energy is transferred to the wheels Which two options describe what happens to the rest of the energy?
A. Some energy is lost because it is transformed into chemical energy B. Some energy is lost because of the heat produced by the engine C. Some energy is lost because of friction in the car's moving parts
D. Some energy is lost because of the weight of the car
E. Some energy is lost because it is transformed into potential energy
TWO ANSWERS
Answer:
B & C
Explanation:
(2: DOK 2) Explain what happens to a snail when salt is poured on it and how this reaction
relates to tonicity for cells.
O a) The addition of salt causes water to leave the snail by active transport, just as a
blood cell shrinks due to active transport when placed in a high salt concentration.
b)
The addition of salt causes water to leave the snail by osmosis, just as a blood cell
would shrink by the diffusion of water out of the cell, if it were placed in a high salt
concentration solution.
c) The addition of salt causes water to enter the snail by diffusion. just as a blood cell
swells when it is placed in a high salt concentration solution,
d) The addition of salt causes water to enter the snail by diffusion, just as a blood cell
swells when it is placed in a high salt concentration solution.
What happens to a snail when salt is added is that the water in its body leaves through the process of osmosis in the same way that a blood cell would react to a solution with a high concentration of salt (option B).
What is osmosis?Osmosis is a scientific term to refer to the physical phenomenon that is related to the movement of a solvent through a semi-permeable membrane. Such behavior assumes a simple diffusion through the membrane, without expenditure of energy.
What happens to a snail when you pour water on it?When we put salt on a snail, the process of osmosis is activated, that is, the water (solvent) from its body passes through its skin. Additionally, the snail has a form of protection that is the slime that it produces when it feels the loss of liquids. However, the release of water causes it to become dehydrated.
In the case of humans, our skin protects us from osmosis occurring. However, when we have an open wound and we add salt, the osmosis process will activate and we will release a certain amount of water depending on the case. So, the correct answer would be option B, because what happens to a snail when we pour water on it is the process of osmosis.
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Trisomy of which pair of chromosomes has the greatest chance of survival?
A. XX
B. Pair 13
C. Pair 8
D. Pair 3
E. Pair 15
Trisomy is a genetic disorder in which an individual has three copies of a particular chromosome rather than the normal two copies. Trisomy of some chromosomes is incompatible with life, whereas trisomy of other chromosomes can result in different health issues.
The correct answer is B, Pair 13.
Trisomy 13, also known as Patau syndrome, is caused by the presence of an additional chromosome 13. It is a severe genetic disorder that affects various organs and systems and has a high mortality rate. Trisomy 13 has the lowest survival rate among all trisomies, with a high percentage of miscarriages or stillbirths.
XX is not considered a trisomy since females normally have two X chromosomes. Trisomy of the X chromosome leads to Klinefelter syndrome or Turner syndrome, depending on the affected sex.
Pair 8, 3, and 15 trisomies are quite rare and have different consequences depending on the individual and the degree of the trisomy.
Overall, it is important to understand that the survival rate of a trisomy depends on the individual and the chromosome affected.
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Which of the following is NOT a system of agriculture?
O Animal Science
O Power, Structural, and Mechanical Systems
O Computer Science and Space Engineering
O Social Systems
which of the following statements about gram-negative cell walls is false? group of answer choices they protect the cell in a hypotonic environment. they have an extra outer layer composed of lipoproteins, lipopolysaccharides, and phospholipids. they are toxic to humans. they are sensitive to penicillin. their gram reaction is due to the outer membrane.
The statement "They are sensitive to penicillin" is false because gram-negative cell walls do not inherently possess toxicity towards humans.
The toxicity associated with some Gram-negative bacteria is primarily due to specific virulence factors they produce, such as toxins or enzymes, rather than the composition of their cell walls. Gram-negative bacteria can indeed cause infections and diseases in humans, but this is not directly attributed to their cell walls.
It is important to note that while some Gram-negative bacteria can be pathogenic, many others are harmless or even beneficial to humans and play important roles in various ecological and physiological processes. Therefore, it is incorrect to state that Gram-negative cell walls are sensitive to penicillin.
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which of the following zones is the location of the most biological activity? view available hint(s)for part a which of the following zones is the location of the most biological activity? the capillary fringe the intermediate belt the unsaturated zone the zone of soil moisture the zone of saturation
The zone of soil moisture is the location of the most biological activity. The biological activity here is very important for the maintenance of soil fertility as it contains various living organisms, such as earthworms, fungi, bacteria, etc. The zone of soil moisture.
which is also referred to as the root zone or vadose zone, is located above the water table where water is available to plants and soil microbes. In this zone, water and nutrients are absorbed by plant roots and microorganisms that live in the soil. As a result, the zone of soil moisture has a lot of biological activity as compared to other zones.
The capillary fringe is the region above the water table that is saturated with water due to capillary action. The intermediate belt is an old term used to refer to the capillary fringe. The unsaturated zone is the area above the water table where soil and rocks are not saturated with water, while the zone of saturation is the area below the water table where soil and rocks are saturated with water.
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Which sequence lists the correct order of events in the area represented in the diagram?
You didn’t add the diagram
1. Original DNA: CATATACGCATCTGATTACGTGATTCT CTATA GTATATGCGTAGACTAATGCACTAAGAGATAT
Show the DNA after it has been separated by helicase.
Top Strand:
Bottom Strand:
Explanation:
gtatatgcgtagactaatgcactaagagatatcatatacgcatctgattacgtgattctctata
how would you design an experiment to test the effects of this trophic cascade? your design should include a control and a manipulated variable as well as how you would measure your results.
In order to design an experiment to test the effects of a trophic cascade, we need to first understand what a trophic cascade is.
A trophic cascade is a chain of events that starts at the top of the food chain and trickles down to the bottom. A simple trophic cascade would involve a predator that feeds on a herbivore, which in turn feeds on a plant.The design of an experiment to test the effects of a trophic cascade involves a control and a manipulated variable.
The manipulated variable refers to the variable that is changed in the experiment, while the control variable refers to the variable that is kept constant in the experiment. In designing an experiment to test the effects of a trophic cascade, we would select two groups of plants of the same species.
One group of plants would be exposed to predators while the other group of plants would be isolated from predators. In this experiment, the manipulated variable would be the presence or absence of predators.The control variable in this experiment would be the environment in which the plants are grown. Both groups of plants should be grown in the same environment under the same conditions.
Measuring the results of the experiment would involve measuring the growth rate of the plants in both groups. We would also measure the biomass of the plants in both groups. This would enable us to determine the effect of the trophic cascade on plant growth and biomass.
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A personal trainer thinks her clients get better workouts and are stronger if they listen to music while working out. Over the next week, she divides her 20 clients into two groups of 10. For the first group, she plays music and sees if they can lift a barbell weighing 50 lbs. For the second group, she repeats the test but does not play any music. All 10 members of the music group could lift the barbell, but only 7 members of the no music group could lift the barbell. She concludes that her hypothesis was correct and decides to always play music for her clients. What was the personal trainer's hypothesis?
Answer:
The personal trainer thinks that working out to music will make you stronger and get better workouts.
Explanation:
the term used to describe a disease-causing microorganism is group of answer choices virus. microbe. bacterium. infection. pathogen.
The term used to describe a disease-causing microorganism is a pathogen. Pathogens are microorganisms that cause infections, which include viruses, bacteria, fungi, and parasites, among others. These microorganisms can cause a range of illnesses.
from minor infections like the common cold to severe diseases like tuberculosis, AIDS, and COVID-19. Pathogens are highly adaptive and can mutate rapidly, making them challenging to control and treat.Viruses are infectious agents that are composed of a protein coat and genetic material, either DNA or RNA. They can only reproduce inside host cells, causing various diseases like HIV, influenza, and COVID-19. Bacteria are single-celled microorganisms that can be found in almost every environment, including soil, water, and the human body.
Some bacteria are beneficial, while others are harmful and can cause infections like strep throat, pneumonia, and meningitis. In contrast, a microbe is a general term used to describe any microscopic organism, including bacteria, fungi, protozoa, and viruses.In conclusion, a pathogen is the term used to describe a disease-causing microorganism, which can include viruses, bacteria, and other microorganisms.
These pathogens are highly adaptive and can cause a range of illnesses, from minor infections to severe diseases. It is essential to understand the nature of pathogens to prevent and control the spread of infectious diseases.
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Please help!!!
Match the gradients with their nomenclatures.
Which condition is necessary for enzymes and hormones to function properly in the human body?
1. These chemicals must have a specific shape.
2. These chemicals must be able to replicate.
3. Body temperature must be above 40°C.
4. Body pH must be above 10.
Answer:
2. These chemicals must be able to replicate
Explanation:
Chlorophyll absorbs __________ and ____________ but reflects ___________ light.
Answer:
Chlorophyll absorbs blue and red but reflects green light.
Explanation:
what are some cellular respiration reactants and products
Answer:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Explanation:
Identify clues you would look for to judge whether a claim is based on science or pseudoscience.
write pseudocode for implementing gaussian elimination with backward substitution. you do not need to worry about pivoting
Certainly! Here's a pseudocode implementation of Gaussian elimination with backward substitution:
function gaussianEliminationWithBackwardSubstitution(A, b):
n = length(b) # Number of unknowns/variables
for k from 1 to n-1:
for i from k+1 to n:
factor = A[i][k] / A[k][k]
for j from k+1 to n:
A[i][j] = A[i][j] - factor * A[k][j]
b[i] = b[i] - factor * b[k]
# Backward Substitution
x = [0] * n # Array to store the solution
x[n] = b[n] / A[n][n] # Compute the last variable
for i from n-1 down to 1:
sum = 0
for j from i+1 to n:
sum = sum + A[i][j] * x[j]
x[i] = (b[i] - sum) / A[i][i]
return x
In the above pseudocode, A represents the coefficient matrix, b represents the constant vector, and x represents the solution vector. The algorithm iteratively performs Gaussian elimination to convert the coefficient matrix into an upper triangular matrix and adjusts the constant vector accordingly. It then performs backward substitution to calculate the solution vector by substituting the values starting from the last equation and working upwards.
Note that this pseudocode assumes that the input system of equations has a unique solution and does not include pivoting for simplicity. In practice, pivoting is often incorporated to improve the numerical stability and handle situations where pivots are close to zero.
Please keep in mind that this is just a pseudocode representation and may require adaptation depending on the specific programming language or environment you are using.
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A major distinction between prokaryotes and eukaryotes is the presence of membrane-bound organelles in eukaryotes.
Describe the structure and function of two membrane-bound organelles other than the nucleus.
Answer:
is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.
Explanation:
The inner membrane is loaded with the proteins that make up the electron transport chain and help generate energy for the cell. The double membrane enclosures of mitochondria and chloroplasts are similar to certain modern-day prokaryotes and are thought to reflect these organelles' evolutionary origins.
Answer:
membrane-bound organelles
Explanation:
Which of the following human cells contain a gene that specifies eye color?
A. Cells in the eye
B. cells in the heart
C. Gametes
D. Cells in the eye and gametes
E. all of the above
Cells in the eye and gametes contain the genes that specify the eye color.
The gene that determines eye color is located in the cells of the eye, particularly in the iris, which controls the pigmentation of the eyes. This gene plays a crucial role in specifying the color of an individual's eyes.
Additionally, genetic information, including the eye color gene, is carried by the gametes, which are the sperm and egg cells responsible for reproduction. During fertilization, the genetic material from both parents combines, which contributes to the determination of eye color in the offspring.
Therefore, the cells within the eye and the gametes both contain the gene responsible for eye color.
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People are less likely to have certain bacterial infections now than they were 100 years ago. Which two practices have been developed more and more over time and have reduced cases of bacterial infection?People are less likely to have certain bacterial infections now than they were 100 years ago. Which two practices have been developed more and more over time and have reduced cases of bacterial infection?
Answer:
Explanation:
Through practice of personal hygiene, personal hygiene have been a point of emphasy over the years as one of the major ways to avoid various infection inclusing bacteria infection. Human are likely receptor of infection in an unhealthy and dirty environment and more reason for personal hygiene to reduce it.
The use of antibiotics to prevent various bacterial infection. Many antibactetial drugs have been develop over time to combact the infection from thriving leading to a reduction in the outbreak of the infection.
refrigeration and trash collection
Explanation: took test on edge
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review the experiments carried out by griffith and those performed by avery, mccarty, and macleod that we discussed in class. what conclusion could be drawn from griffith's experiment and was also supported by the results of avery, mccarty, and macleod's experiment? review the experiments carried out by griffith and those performed by avery, mccarty, and macleod that we discussed in class. what conclusion could be drawn from griffith's experiment and was also supported by the results of avery, mccarty, and macleod's experiment? proteins are not required for transformation. heat (boiling) does not destroy the molecule(s) required for transformation. dna is the molecule that contains the information required for transformation.
The experiments carried out by Griffith, Avery, McCarty and MacLeod are significant as they laid the foundation of the molecular biology revolution. Griffith was trying to develop a vaccine for pneumonia, and he noticed something unusual while conducting his experiment.
He found that the dead virulent strain bacteria could transform the live nonvirulent strain into virulent. This phenomenon is known as the transformation. He concluded that some molecule or substance from the dead cells of the virulent strain was taken up by the nonvirulent strain cells, transforming them into virulent. He called this substance the transforming principle.
He was not able to identify the transforming principle, but his results were supported by the experiments performed by Avery, McCarty and MacLeod.Avery, McCarty, and MacLeod used purified DNA from the dead cells of the virulent strain to transform the nonvirulent strain.
They observed that the DNA was the transforming principle and responsible for changing the genotype of the nonvirulent strain into virulent.
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Scientists have been concerned with climate changes and increase global warming. The presence of salt in the ocean's waters will alter the colligative properties of water. What physical property will change and how could this change contribute to sea level rising?
Answer:
Physical properties that contribute to the change in sea level rising are -
Eustatic sea-level changes Isostatic sea-level changes Tectonic sea-level changesExplanation: All these three physical properties contribute to sea level rising.
Eustatic sea-level changes - Global changes in sea levels are either related to changes in the volume of glacial ice on land or to changes in the shape of the sea floor caused by plate tectonic processes. Changes in the rate of mid-ocean spread, for example, will change the shape of the sea floor near the ridges, and this will affect the level of the sea. Due to glacial melting, there has been about 125 m of eustatic sea-level increase over the past 20,000 years. During the major melting process of the North American and Eurasian Ice Sheets, much of this occurred between 15,000 and 7,500 years ago.Isostatic sea-level changes - Local changes caused by crust subsidence or uplift are either due to changes in the amount of ice on the ground, or to mountain growth or erosion. At the end of the last glaciation, almost all of Canada and portions of the northern United States were covered in dense ice sheets. An isostatic rebound of the continental crust has occurred in several regions following the melting of this ice. This ranges in the central part of the Laurentide Ice Sheet (aroo) from several hundred metres of rebound.Tectonic sea-level changes - The subduction of the Juan de Fuca Plate underneath British Columbia is causing tectonic uplift (about 1 mm / year) along the western edge of Vancouver Island, but most of this uplift is likely to be reversed when the next major earthquake reaches the subduction zone.Hence, these three physical properties contribute to the change in sea level rising.
