Answers
Numerous structural elements of the nucleus, such as the nuclear envelope and DNA, regulate the size and shape of the nucleus.
One of the most noticeable features of a eukaryotic cell is its spherical nucleus, which normally makes up 10% of the cell's volume (refer the picture attached below).The nucleus of mammalian cells has an average diameter of about 6 micrometres.Lamins, intermediate filament proteins, are the proteins that make up the nuclear lamina. By supporting the nuclear envelope, they guarantee that the nucleus' general shape and structure are preserved.It makes sense that DNA may have an impact on nuclear volume as the size of the nucleus may be directly correlated with the quantity of DNA it contains and the degree to which that DNA is compacted.Hence, numerous structural elements of the nucleus, such as the nuclear envelope and DNA, regulate the size and shape of the nucleus.
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Related Questions
The occurrence of a change in the properties of an object or system is called a _____
PLEASE ANSWER FAST
Answers
If the change in composition takes place then it is chemical change, and if the composition is not changes then it is physical change.
What is physical change?
Physical alterations are those that change the form but not the chemical composition of a thing. Physical changes can be used to separate mixtures into their constituent compounds, although they typically cannot separate compounds into chemical components or smaller molecules.
The composition must not be changed by physical adjustments; only the display must change.
Chemical alteration from the original components causes one or more compounds to totally change in composition.
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PLEASE HELP.100 points
Boyle's law states that the pressure of a gas tends to increase as the volume of the container holding the gas decreases.
Which explains why this is a law rather than a theory?
A.It is a statement of fact.
B.It explains how the pressure of gases changes.
C.It has been revised and replaced over time.
D.It has changed due to advances in technology.
Answers
Answer:
The answer is A it is a statement of fact
Explanation:
Law is something that is universal at all times every where thats why it can be referred to as universal law.
1.Kim wanted to determine how temperature affected the growth of E. coli, a common intestinal bacteria in humans. The normal body temperature for humans is 98.6oF. He took one culture of bacteria and grew them at 95oF, 98.6oF,100oF and 108oF.
what is the control and experimental group?
Answers
In the student's experiment;
the control group is bacteria grown at 98.6°Fthe experimental group is bacteria grown at 95°F, 100°F, and 108°F.What are control and experimental groups in an experiment?The control group in an experiment is the group which does not receive the treatment that the researcher wishes to determine its effect on a group in the experiment. The control group may receive he standard treatment.
The experimental group in an experiment is the group which receives the treatment that the researcher wishes to determine its effect on a group in the experiment.
In the experiment;
the control group is bacteria grown at 98.6°Fthe experimental group is bacteria grown at 95°F, 100°F, and 108°F.
In conclusion, an experiment has a control and experimental group.
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03 LC) kilogram (kg) is a measurement of which of the following quantity
Answers
Kilogram or Kg is a measurement of Mass.
What is Mass?A physical body's overall composition is measured by its mass. It also measures the body's inertia, or resistance to acceleration in the presence of a net force. The mass of a thing also affects how strongly it attracts other bodies through gravity.
In the SI, the kilogram serves as the basic mass unit (kg). Mass is not the same as weight in physics, despite the fact that weight is commonly determined to use a spring balance instead of a balancing scale and compared directly with known masses.
An object may weigh less than it does on Earth while retaining the same mass due to the reduced gravity on the Moon. This is true because weight is a force, whereas mass is a property.
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A diagram of a food web for an African grassland is shown. The greatest competition would most likely occur if which of the following organisms were to decrease?
Question 5 options:
Mice and pangolins
Grasshoppers and impalas
Mongoose and lions
Red oat grass and warthogs
Answers
The greatest competition would most likely occur if grasshoppers and impalas were decreased. Thus, the correct option is B.
What causes competition in a food web?
Competition occurs between different species when individuals of different species struggle to obtain the same resource in an ecosystem such as food or space. Adaptations are the physical and behavior modifications which can help an organism outcompete its competitors.
Impalas are the medium-sized antelopes that roam the savanna and light woodlands of eastern and southern Africa. They are similar to grasshoppers. A decrease in the organisms of grasshoppers and impalas may result into greatest competition in the food web.
Therefore, the correct option is B.
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The model shows the cycling of carbon.
Which part of the model shows carbon moving from the biosphere to atmosphere?
A. The sheep carrying out respiration.
B. Waste materials coming from the sheep.
C. (REFER TO PICTURE!!)
D. The sheep taking in nutrients.
Answers
The sheep carrying out respiration is the correct answer.
The exchange of carbon between the Earth's biosphere, pedosphere, geosphere, hydrosphere, and atmosphere occurs through the carbon cycle, a biogeochemical process. Both biological substances and many minerals, including limestone, mostly consist of carbon.The carbon serves as the model for how carbon moves across the environment and between the many spheres.The process of cellular respiration, carried out by the living world or the organisms, adds carbon dioxide to the atmosphere, which is present in the atmosphere as bound carbon.The sheep engaged in respiration is the right response since cellular respiration is how carbon dioxide gets from the biosphere to the atmosphere.The carbon cycle is one of three cycles—along with the nitrogen cycle and the water cycle—that play a crucial role in the ability of Earth to support life.Therefore, option A. is correct.
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True or False: Enzymes can be used over and over in a reaction. They are not used up.
Answers
True, Enzymes can be used over and over in a reaction. They are not used up.
Enzymes only catalyze the chemical reaction in forward or backward direction
Enzymes may be utilized again to speed up the same process since they don't become damaged or depleted during the reactions they catalyze. Enzymes are incredibly efficient because each one is very specialized for the chemical process it catalyzes.
A biological catalyst called an enzyme is usually always a protein. It accelerates a certain chemical process in the cell.
The Enzyme efficiency increase with increase in temperature, but at a certain point it start declining it's activity with increase in temperature which ultimately cause the denaturation of enzyme.
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Various amounts of table salt are added to water and its affect on density of water is
recorded.
what is the control and experimental group ?
Answers
The control is the source of the water.
What is control?The control of an experiment is the factor that must be held constant in order for the experiment to be reliable. If these factors are not held constant, then the experimental results are not reliable.
In this case, we are measuring the effect of addition of salt to the density of water. We have to ensure that the water is all taken from the same source so that we can be sure that the density is only affected by the addition of the salt and not other extraneous factors.
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Which statement best describes a difference between a scientist and an
engineer?
A. A scientist asks, "Why does this happen?" while an engineer asks,
"How can I make this work?"
OB. A scientist gets inspiration only from nature, while an engineer
gets inspiration only from human-made things.
OC. A scientist is focused on meeting the needs of people, while an
engineer is concerned with the pursuit of knowledge.
OD. A scientist follows a series of steps, while an engineer solves
problems without a process.
Answers
The statement that best describes a difference between a scientist and an engineer is a scientist would ask, "Why does this happen?" while an engineer would ask, "How can I make this work?"
Scientist indulge in research to know the process behind the things that are happening in either living or non-living matters. They focus mostly to the understand the mechanism so that they could provide a solution. On the other hand, Engineer indulges in making a product based on the recordings from research or it can be novel.
Scientist and engineer can get their inspiration from both nature and human-made things as it is not restrained. It’s not something that can be separated.
An Engineer is focused on meeting the needs of people, while a scientist is concerned with the pursuit of knowledge. But we can’t be certain as knowledge is required for the development. Both are inter-related.
A scientist and an engineer may follow a series of steps or solves problems without a process based on the requirement.
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Which statement about properties of Life is false
Answers
Question is incomplete;
The FALSE statement about properties of Life is:
All organisms have the ability to maintain a constant internal temperature.
The claim that all living things have the capacity to maintain a constant internal temperature is FALSE
Different stimuli, such as light, heat, mechanical contact, etc., can cause an organism to react.
Energy is needed by organisms to carry out their metabolic processes (e.g., growth, differentiation, reproduction, etc)
Animals with cold blood, or poikilotherms, are unable to maintain a consistent body temperature regardless of the outside temperature.
Fish, insects, worms, amphibians, and reptiles are examples of poikilothermic animals.
The ability of all creatures to keep a constant internal temperature is, therefore, a FALSE assertion
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what is osmosis and what are the function
Answers
Answer:
the transport of a solvent through a semipermeable membrane that separates two solutions of differing solute concentration.
Explanation:
hope this helps
Answer: when water moves from an area of LOW solute concentration (low osmolarity) to an area of HIGH solute concentration (high osmolarity) through a semipermeable membrane.
Explanation: In biology, osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.
research
5. Evaluate the impact of pasteaur's on both
Scientific thought and society. What was the affect
Of Pasteurs investigation on scientist ideas and
people's lives?
Answers
Answer: Pasteur discovered Pasteurization, meaning without his discovery, today, we would not have easy access to long lasting milk. His discoveries also help scientists with vaccines.
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
Describe the two functions of the coarse focus knob on the SI V-Scope.
Answers
The coarse focus knob on the SI V-Scope lowers and raises the microscope stage and uses power to focus.
The coarse focus knob on most microscopes is located around the bottom center part of the arm of the microscope as illustrated in the image below. The larger of the two knobs and one that is closest to the microscope's arm is the coarse adjustment knob.
Only the lowest power objective lens should be used with the coarse focus knob. You will only need to utilize the fine focus once it is in focus. With higher lenses, using the coarse focus could cause the lens to fall into the slide.
Focus (coarse), The coarse focus knob is used to roughly or almost focus the specimen. Focus (fine), After bringing the image into focus with the coarse focus knob, use the fine focus knob to make it more sharply focused.
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One of the main reasons that the American diet is unbalanced
Answers
One of the main reasons that the American diet is unbalanced is because of their high consumption of preserved or canned food and a diet that is rich in fats and calories.
A balanced diet must contain the following seven components: carbohydrates, protein, fat, fiber, vitamins, minerals, and water.Maintaining good health and feeling your best can both be facilitated by eating a healthy, balanced diet. To acquire and maintain a healthy body weight, this entails consuming the appropriate amounts of food and drink, as well as a wide variety of meals in the appropriate quantities.Foods that have been preserved and are not truly fresh are referred to as processed foods. Processes that involve the addition of preservatives include canning, smoking, salting, and curing.Because processed meals are frequently easier to find than fresh foods, many consumers choose them over fresh produce. Fresh goods might occasionally be more expensive than their processed equivalents.Hence, the American diet is unbalanced because of their consumption of processed food.
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Analyze and evaluate how natural selection produces change in populations as opposed to individuals
Answers
Answer:
For natural selection to work there must be variation in the population for it to act upon and so ‘choose’ the most fit genes for a particular situation. Populations tend to produce more offspring than the environment can support, and the inevitable consequence of this overproduction of offspring is a struggle for survival. Natural selection creates these selection pressures so the organisims best suited for the environment are more likley to survive and therefore pass on their genes to their offspring.
Natural selection can only happen in a population rather than an individual becasue it is the whole population's characteristics culmalitvley changing to better suit the environment. By passing down favourable traits to their offspring. It cannot happen in an individual because they cannot change their traits to better suit the environment, only pass on their traits to their offspring. A change due to natural selection can take generations
Meiosis generates gametes for sexual reproduction. The mixing of the blue * 1 point
and red chromosomes in the model below demonstrates a process known
as crossing over. Crossing over occurs during prophase 1 of meiosis.
Complete the statement based on the image of meiosis. "Crossing over is
the exchange of genetic material between homologous pairs of
chromosomes. This process.
the variation in the resulting
gametes because each contains.
material."
(11₂1)
4
5
Interphase
Homologous
Chromosomes
O increases, identical
O increases, different
O decreases, identical
decreases, different
Melosis I
Daughter
Nuclei
Daughter
Nuclei
(HH)
88-00
Meiosis II
versions of the original genetic
Answers
Answer:B. Increases, different
Explanation:
Why are hypothesis so important to controlled experiments?
Answers
Answer:
Hypotheses are so important to controlled experiments because they are testable explanations for a set of observations.
----------------------------
Hope this helps!
Have a great day and God bless! :)
A rabbit lives in a temperate forest. Which would be an adaptation for this
rabbit?
OA. Being easily visible to prey
B. Changing color when snow falls
OC. Being cut by a sharp stick
OD. Learning where ants hide
Answers
Answer: If a rabbit lives in a temperate forest an adaptation would be the ability to change color when snow falls.
Explanation:
If a rabbit lives in a temperate forest an adaptation would be the ability to change color when snow falls.
What is Habitat and Heredity?The Habitat change can change the affect the heredity of the population by increasing the isolation and decreasing the effective of the population size. The Given statement has been related to the environment and heredity connection.
As per the question the rabbits lived in a forest habitat have varied coat colors such as brown, white and black. When habitat changed from forest to snow, the coat color which best suited for rabbits is Color White.
Temperature has a factor that alters the characteristics of the animals in terms of the movements and others. Rabbits that live in the temperate forests usually live underground to minimize exposure to harsh sun. This changes the way they acquire food, mate and live in general.
Therefore, option B is correct.
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How did the scientific research that started the Green Revolution affect society?
Answers
There were many impacts of green revolution which was affected our society and these were there was increase in area of farming because the main aim of green revolution was to increase the productivity of the crop.
What is green revolution?A revolution was started worldwide and the main objective of the revolution was to grow crops as much as possible and this revolution was for large production of crop than on this basis its name was decided and the name of the revolution was green revolution.
In India a great geneticist M.S. Swaminathan has started green revolution and it was started near about 1960 and this has changed the scenario and due to this revolution production of crops increased.
Therefore, There were many impacts of green revolution which was affected our society and these were there was increase in area of farming because the main aim of green revolution was to increase the productivity of the crop.
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Cyanide (CN-) poisoning stops cellular respiration by inhibiting the actions of cytochrome c oxidase enzymes in the mitochondria. Specifically, cyanide blocks complex IV of the electron transport chain. What does that suggest about oxygen’s role as an electron acceptor?
Answers
A theory can...
A. become a law.
B. be developed from a well-tested hypothesis.
C. is an absolute about the universe.
Answers
Explanation:
what happens when all the organisms in a species die
Answers
Answer: Wood and leaves decays bringing the carbon into the ground.
Hope this helps
What is a model? Use the word phenomenon in your answer.
Answers
Answer:
down below
Explanation:
A model is a smaller representation of a phenomenon in our universe.
Hope this helps! :)
PICK UP LINE:
Please come up with a pick up line for a chloroplast :)
(other than: are you a chloroplast? Because you chlorophyll my heart)
Answers
A chloroplast, are you? Because of you, my brain is full of chlorophyll.
Photosynthesis, the process by which light energy is transformed into chemical energy and results in the generation of oxygen and energy-rich organic compounds, takes place in the chloroplast, a structure found inside the cells of plants and green algae. Close cousins of chloroplasts that are free-living are photosynthetic cyanobacteria; according to the endosymbiotic theory, these organisms are the ancestors of both chloroplasts and mitochondria, which are eukaryotic cells' energy-producing organelles.
The chloroplast genome is typically 120–200 kilobases long and circular (although linear variants have also been seen). A growing number of chloroplast genes have been transferred to the genome in the cell nucleus over the course of evolution, significantly shrinking the size of the contemporary chloroplast genome. As a result, nuclear DNA-encoded proteins are now required for the proper operation of chloroplasts.
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I will give you brainliest if you answer as fast as you can!
Which of the following statements is not true of lipids?
a. they are the primary source of energy for bodily functions.
b. they are digested and absorbed in the small intestines.
c. they are made of long chains of triglycerides and fatty acids.
d. they are the source of fat-soluble vitamins in the body.
Answers
An oocyte is an immature reproductive cell found in many sexually reproducing organisms. A crawfish oocyte has a radius of approximately 1\, \text{mm}1mm1, start text, m, m, end text, while a human oocyte is much smaller and has a radius of about 0.05\, \text{mm}0.05mm0, point, 05, start text, m, m, end text.
Surface area of a sphere: A = 4πr^2A=4πr
2
A, equals, 4, π, r, squared
Assuming both cell types are perfectly spherical, how many times larger is the surface area of a crawfish oocyte compared to the surface area of a human oocyte?
Answers
The Crawfish is 400 times larger than the human oocyte.
How to calculate the area?It should be noted that the radius is given as 1mm.
The surface area is also illustrated as 4πr². The surface area will then be:
= 4 × 3.14 × (1)²
= 4 × 3.14 × 1
= 12.56mm²
The radius of human = 0.05m
The surface area is also illustrated as 4πr². The surface area will then be:
= 4 × 3.14 × (0.05)²
= 4 × 3.14 × 0.0025
= 0.0314mm²
The ratio will be:
= Crawfish / Human
= 12.56 / 0.0314
= 400
In conclusion, the crawfish is 400 times larger than the human oocyte.
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2 diff ways antibiotics work against bacteria
Answers
Answer:
There are two main ways in which antibiotics target bacteria. They either prevent the reproduction of bacteria, or they kill the bacteria, for example by stopping the mechanism responsible for building their cell walls.
Answer:
Antibiotics can kill bacteria by:
1. Preventing the production of peptidoglycan that forms the cell wall. The cell will continue to grow without developing new cell wall, this causes the already existing cell wall to get weaker which will eventually cause the cell to rupture.
2. Stopping the production of proteins (protein synthesis) which prevents the production of new DNA
What is protected within the nucleus?
A. Polysaccharides
B. DNA
C. Prokaryotic cells
Answers
Answer:
I want to say C. Prokaryotic cells
Explanation:
I could be wrong
In a lab experiments where researchers are collecting data on hallucinations drugs they are most likely are stimulating overactivation of : 1. Serotonin 2. melatonin 3. dopamine or 4. epinephrine
Answers
In lab experiments where researchers are collecting data on hallucinations drugs, they are most likely stimulating the overactivation of melatonin.
What is melatonin?
Your body produces melatonin, a hormone that affects sleep. Melatonin is produced and released by the brain according to the time of day, rising in the dark and falling in the light. With age, melatonin production decreases.
In the form of an oral tablet or capsule, melatonin is also offered as a dietary supplement. The majority of melatonin supplements are created in a lab. Melatonin is frequently used by people to treat sleep disorders like jet lag and insomnia.
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Which statements accurately describe the polarity and electronegativity of water?
-The oxygen atom in a water molecule is strongly electronegative.
-Water molecules have slight charges and are attracted to each other by ionic bonds.
-Water molecules are polar and thus associate with each other through hydrogen bonds.
-Covalent bonds in a water molecule bind its oxygen atom to its two hydrogen atoms
-Water is polar, which means that it has an overall negative charge.
Answers
A slightly positive charge on hydrogen and a slightly negative charge on oxygen, contributing to the properties of water of attraction.
Which statements accurately describe the polarity and electronegativity of water?Polarity Of Water:
The one oxygen atom and the two hydrogen atoms which are present in a water molecule "H2O" form a polar covalent bond. There is no net charge on water molecule, the polarity of water molecule creates a partial positive charge on Hydrogen and partial negative charge on Oxygen which helps for contributing the attraction force.
Electronegativity Of Water:
A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
So we can conclude that a slightly positive charge on hydrogen and a slightly negative charge on oxygen, contributing to water's properties of attraction.
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