Answer:
Option A, current scientific knowledge
Explanation:
New scientific discoveries are based on the existing/current scientific knowledge. Knowledge/research/new discovery is inevitable and thus it is continuously tested and trialed thereby leading to emergence of new concepts and theories for same existing fact. All the existing scientific concepts and theories can be refined based on the new interventions but discarding an existing theory completely is non viable.
For example - Scientist found that atom was the smallest unit of matter. With further discoveries in the later layers, it was found that it is the electron, proton and neutron which is the smallest unit of matter, and now the current discoveries shows that there are particles even smaller than electron such as meson and thus meson should be considered as smallest unit of matter.
at what point in the water cycle can water damage a ecosystem
During the process of precipitation, water can cause damage to the ecosystem as in flooding and in acid rain.
What is the water cycle?The water cycle is a natural geological cycle of how water circulates between the atmosphere and the earth's surface.
Some steps in the water cycle are:
EvaporationCondensation and PrecipitationDuring the process of precipitation, water can cause damage to the ecosystem as in flooding and in acid rain.
Therefore, precipitation can cause damage to the ecosystem.
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A cell moves particles from a region of lesser concentration to a region of higher concentration by
true or false, as a cells size increases, its amount of DNA also increases
As the cells size increases, its amount of DNA does not increases. Thus, the given statement is false.
What change occur during cell growth?Cell growth can be defined as the increase in the total mass of a cell, which include both the cytoplasmic, nuclear and organelle volume increase. Cell growth occurs in the cell when the overall rate of cellular biosynthesis that is the production of biomolecules or anabolism is greater than the overall rate of cellular degradation in the destruction of biomolecules via the proteasome formation, lysosome or autophagy, or through catabolism.
During the interphase, cell grows in size and makes a copy of its DNA (Deoxyribonucleic acid). During the mitotic phase (M-phase), the cell separates its DNA or genetic content into two equal sets and divides its cytoplasm, which results into formation of two new cells.
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There are three types of fibers in the cytoskeleton. Which of these is NOT a cytoskeleton fiber? A) microtubules B) macrotubules C) microfilaments D) intermediate filaments
There are three primary types of fibers in the cytoskeleton and out of all the options, B. Macrotubules are not in the cytoskeleton.
The three types of fibers in the cytoskeleton are:
Microtubules - composed of protein tubulins and are useful in locomotion Microfilaments - composed of the protein actin and are used for cytokinesis Intermediate filaments - these help cells by providing tensile strengthAll these are in the cytoskeleton and serve various functions apart from the macrotubules. We can therefore conclude that the cytoskeleton does not contain any macrotubule fibers.
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Enzymes are proteins. What would happen to the enzymes of your body if your body temperature started to rise to an abnormally high degree?
A. Nothing, the enzymes would be fine because they are very stable molecules.
B. The enzymes' substrates would become changed in shape and no longer fit the active sites of the enzyme.
C. The enzymes would become denatured and their active sites would lose their shape causing them not to work.
D. The enzyme would become larger than the substrate but would still continue to work, just not as well.
If the body's temperature rises abnormally high, enzymes lose their specific shape becoming denatured. This causes the active sites of the enzymes to change shape and stop working properly. This can impact the body's functioning since enzymes play a crucial role in physiological processes.
Explanation:Enzymes are indeed proteins and they greatly depend on the temperature range of the human body, which is typically 37 degrees Celsius or 98.6 degrees Fahrenheit. When body temperature rises to an abnormally high degree, enzymes would not remain stable. The correct answer would therefore be option 'C'. The enzymes would become denatured, losing their specific three-dimensional structure or conformation. The shape of their active sites would change, making it impossible for substrates to bind effectively, causing the enzymes to stop functioning properly. This process is irreversible and thus, can have severe consequences on the body's physiological processes where enzymes play key roles.
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Plzz answer :Sodium chloride breaks down into sodium and chlorine. Why is this process classified as a chemical reaction?
A. A substance has been changed into a different substance.
B.Change can only occur in one direction.
C.There is greater mass of the sodium chloride than there is of the products.
D.The original molecular formula has been altered
The process of breaking Sodium chloride into sodium and chlorine is classified as a chemical reaction because a substance has been changed into a different substance. Thus, the correct option for this question is A.
What is a Chemical reaction?A chemical reaction may be defined as a type of process through which one or more substances that are known as the reactants significantly are converted to one or more different substances known as the products.
The mass of the reactants always remains equal to that of the mass of the product. This is because of the law of conservation of mass. So, option C is eliminated.
This reaction involves bidirectional propagation. This is because sodium and chlorine togetherly constitute the formation of sodium chloride, while sodium chloride dissociates into sodium and chlorine. So, option B is eliminated.
Therefore, the correct option for this question is A.
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1. Which characteristic allows carbon to form chains and rings with other carbon atoms?
A. Carbon is the fourth most abundant element in the universe
B. Carbon has several forms
C. Carbon can form four covalent bonds
D. Carbon is the structural parts of lipids, carbohydrates, proteins, and nucleic acids
Answer:
The answer is C. Carbon can form four covalent bonds
Carbon can form four covalent bonds is the characteristic that allows carbon to form chains and rings with other carbon atoms.
Carbon forms bonds with itself, which is known as carbon-carbon bonds, since carbon is tetravalent, which makes it have the possibility of forming bonds with other carbon atoms and other elements.
The tetrahedral structure of carbon means that in its outermost electronic shell it has four valence electrons that it can share, so it has the ability to form four covalent bonds with other carbon atoms or with other elements.
Precisely because of the great facility that carbon possesses to link together forming chains, there are so many different types of hydrocarbons.
Carbon forms bonds with many elements on the periodic table such as alkaline and alkaline earth elements (minus francium, barium, and radium).Carbon has the characteristic of being able to form long and fairly stable chains, this characteristic or property is called concatenation.Therefore, we can conclude that Carbon can form four covalent bonds is the characteristic that allows carbon to form chains and rings with other carbon atoms.
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Which plants are usually the first to grow during secondary succession
The answer might be weeds. I'm like 85% sure.
Which of the following is the primary technique for determining the absolute age of a rock?
A. Measuring radioactive decay of element isotopes
B. Comparing the rock to other geologic features
C. Measuring the dimensions of the rock
D. Comparing the rock to similar rocks and noting the differences
Answer;
Measuring the radioactive decay of element isotopes.
The primary technique for determining the absolute age of a rock is the measuring the radioactive decay of element isotopes.
Explanation;
The measuring of the radioactive decay of element isotopes to determine the age of rocks is called Radiometric Dating.
Radiometric dating is a method of determining the absolute age of an object such as rocks by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope.
Write a sentence using the word 'resistance'
Why does prolonged exposure to UV light from the sun or tanning beds increase the risk for getting skin cancer?
A.increased exposure to UV light decreases the risk of a mutation occurring
B.increased exposure to UV light increases the risk of a mutation occurring
C.increased exposure to UV light decreases the immune system function
D.increased exposure to UV light has no effect on the risk for getting skin cancer
Answer:
Option B, increased exposure to UV light increases the risk of a mutation occurring
Explanation:
Ultraviolet radiations (UV) coming from the sun are radioactive waves that affect the skin. They not only cause skin infection, irritation, but are are also potential source of cancer causing agent . Some times these radiations on prolonged exposure causes genetic mutations in the skin cells which continues though ages.
Ultraviolet rays are short wavelength radiations and the shorter is the wavelength of any radiation, the greater is the potential harm caused by it.
Hence, UV rays are harmful.
Option B is correct
Which substances are responsible for accelerating chemical reactions in cells? amino acids enzymes nucleic acids lipids
Which is an example of an inherited trait?
A knowing how to add
B building muscle tone
C becoming a piano player
D having a round face
What are some possible actions that people can take to reduce air pollution? Select all that apply.
living in the suburbs
living in urban areas
carpooling
using mass transit
traveling by boat
Answer:
living in the suburbs, carpooling, using mass transit
Explanation:
In which type of reproduction can cells divide through the process of mitosis?
chromosome duplication
sexual reproduction
gamete formation
asexual reproduction
Answer:
asexual reproduction
Answer:
asexual reproduction
Explanation:
The earthworm's_______ vessel acts as a pump to push blood throughout the body.
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labord's chameleon how do they get food
Labord's chameleons use their excellent color vision and the ability to focus their eyes to detect prey. They can change their skin color for camouflage and use their long, sticky tongues to quickly capture insects and small invertebrates.
Explanation:Labord's chameleons are adapted to secure food through a combination of their physical and sensory abilities. With color vision and the ability to focus their eyes by changing the shape of the lens, which is better developed in lizards compared to snakes, they can detect prey effectively. Not only can their eyes move independently to maximize their field of vision, but chameleons also have the unique ability to change their skin color for camouflage, making it easier to sneak up on their prey unnoticed.
Once prey is spotted, chameleons utilize their long, sticky tongues, which can shoot out rapidly to capture insects and other small invertebrates. Their tongues act like a sudden trap, extending and retracting quickly enough to catch even the most alert prey. The way they capture food is not only efficient but also relies on their acute senses and stealthy approach facilitated by their color-changing ability and body shape to prevent detection not only by their prey but also by predators.
why do warmer and wetter biomes have higher net primary productivity
A strong acid has a pH approaching:
0
8
5
14
A strong acid has a pH approaching 0.
The lower the number on the pH scale, the more acidic. The higher the number on the scale, the more basic. If the substance has a pH of 7, it is neutral.
Explain in your own words why a roller coaster has gravitational energy.
how are ATP and glucose similar
ATP and glucose are similar as they both store energy that can be used by cells. ATP provides immediate energy for cellular work whereas glucose is broken down to produce ATP during cellular respiration. Both play a crucial role in powering cellular activities.
Explanation:ATP (Adenosine triphosphate) and glucose are both essential for life because they provide energy for cells. They are similar because they both store energy that can be used by cells. ATP is considered the main energy currency of the cell, it is produced from glucose during cellular respiration and it provides immediate energy for cellular work. On the other hand, glucose is a simple sugar that is broken down during the process of glycolysis to produce ATP.
Essentially, the energy stored in glucose is transferred to ATP during the process of cellular respiration. Therefore, both ATP and glucose play a critical role in powering cellular activities.
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The spinal cord is enclosed and protected by the vertebral column and layers of membranes called
Final answer:
The spinal cord is protected by the vertebral column and layers of membranes called meninges, which include the dura mater, arachnoid mater, and pia mater, along with cerebrospinal fluid providing shock absorption.
Explanation:
The Protective Layers of the Spinal Cord
The spinal cord is a vital component of the central nervous system (CNS) and is safeguarded by the vertebral column and layers of membranes known as the meninges. The meninges comprise three distinct layers: the dura mater, which is a thick, durable outer layer; the arachnoid mater, a web-like middle layer; and the pia mater, a delicate inner layer that closely envelops the spinal cord. Between the arachnoid and pia maters, a space exists that is filled with cerebrospinal fluid (CSF), offering additional shock absorption and protection.
These layers serve crucial functions, such as providing a barrier against physical impacts, facilitating the circulation of CSF, and forming a blood-spinal cord barrier that regulates the transfer of substances. Moreover, procedures like lumbar punctures leverage the fact that the spinal cord does not extend through the lower regions of the vertebral column, permitting safe access to CSF for diagnostic purposes.
Collectively, the vertebral column and meninges ensure the CNS's overall protection, allowing for healthy neural function and safeguarding against injury.
explain the importance of resources and suitable habitats to an organism
Resources (food, water, sunlight, space, and mineral nutrients) drive an organism's survival and adaptation within an ecosystem via metabolic processes and physical structures. A suitable habitat, defined by factors like climate, elevation and geography, determines which organisms can thrive. Hence, both resources and habitats significantly influence an organism's nutritional and reproductive strategies.
Explanation:Resources such as food, water, sunlight, space, and mineral nutrients are vital to organisms as they provide the energy for metabolic processes and the matter to make up an organism's physical structures. This competition for resources, a characteristic of natural selection, occurs both within a single species and between different species.
Moreover, a suitable habitat is equally essential for an organism's survival. Factors such as a habitat's climate, elevation and geology can significantly influence which organisms can thrive in that particular area. For instance, in aquatic biomes, the movement of water impacts the availability of nutrients and food resources.
Essentially, the availability of resources and a suitable habitat directly influence an organism's nutritional and reproductive strategies, thereby affecting its survival and adaptation mechanisms in an ecosystem.
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which one of these is not an example of intercellular communication?
Ribosomes make protein. i promise you this is the answer. PLZ MARK ME BRAINLIEST
Which of the following does NOT describe the macronucleus of a paramecium?
A. The macronucleus forms from the fusion of micronuclei.
B. The macronucleus has multiple copies of the genes that are used in day-to-day activities.
C. The macronucleus does not disintegrate during conjugation.
D. The macronucleus is not exchanged during conjugation.
Answer:
1. what are protists
eukaryotes that are not other kingdoms
2. how protists= eukaryotes
common ancestor.
3. nonmotile protist
moved by current
4.Scientists once classified protists
many protists don't have any characteristics similar
5. macronucleus of paramecium
does not disintegrate
Explanation:
Warm humid air creates what kind of pressure system?
which change would make the statement below true 3.9 =39 hundredths
A student sets up a controlled experiment to test the effect of a fertilizer on plant growth. They use 2 tomato plants, one is given 1 cup of water every day, 1 cup of fertilizer every week and daily sun and constant temperature. The second plant is given ½ cup of water every day, no fertilizer and sun every other day and constant temperature. Using your knowledge of the Scientific method why is this not a good experimental design? 1.The second plant should also be given some fertilizer.
2.The second plant had different controls and so it cannot be compared for just the effect of fertilizer 3.The second plant should have a change in temperature 4. The second plant should not have that much water every day.
Diabetics can now obtain insulin that has been manufactured by what biological advancement?
1.HGP
2.hybridization
3.gene splicing
4.cloning
The Krebs cycle and electron transport take place in which part of the cell?
1.cytoplasm
2.mitochondria
3.nucleus
4.vacuoles
Fertilizers are the chemical products used to kill the pests and the insects harming the crops. This was not a good experimental design as the second plant had different control. Thus, 1. option 2, 2. option 3 and 4, and 3. option 2 are correct
What is experimental design?Experimental design is a setup that is prepared to conduct and perform the experiment to know the observations and the results. If there are different controls for the experiment then the comparison is not possible. Hence, option 2 is correct.
Insulin production now is possible in E Coli bacteria with the help of gene splicing and cloning. The genes for insulin are spliced and the bacteria are cloned to make multiple copies to get the protein. Thus, options 3 and 4 are correct.
The Kreb cycle and the ETC are the cycles that occur in the mitochondria of the cell and are involved in the production of the energy molecules, ATP that are vital for the cell functioning. Hence, option 2 is correct.
Therefore, insulin can be produced in bacteria by gene splicing and cloning.
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explain why the process of mitosis is important to Eukaryotic organisms
The process of mitosis is important to Eukaryotic organisms because it controls cell division, growth, cellular repairment, wound healing, etc.
What is Mitosis?Mitosis may be defined as a type of cell division through which two genetically identical daughter cells are formed through the parental cells. These daughter cells are mostly diploid in nature.
According to the context of this question, a form of asexual reproduction in eukaryotic organisms is also mediated by mitosis. If the function of mitosis is eliminated or out of control, it will lead to the abnormal growth of the cells and causes cancer.
When an individual is suffering from injury, the damaged cells or tissued are replaced by the mechanism of mitosis. So, the significance of mitosis in a eukaryotic cell is of great importance.
Therefore, the process of mitosis is important to Eukaryotic organisms because it controls cell division, growth, cellular repairment, wound healing, etc.
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Los niños ________ (conocer) a sus abuelos en Colombia el año pasado.
Los niños conocieron a sus abuelos en Colombia el año pasado.
La palabra "conocieron" es la forma conjugada del verbo "conocer" en la tercera persona del plural del pretérito perfecto simple en español. Este verbo indica una acción completada en el pasado, específicamente en el año anterior al momento presente.
"Conocer" se utiliza para expresar el acto de conocer o encontrarse con alguien por primera vez, o para referirse al conocimiento o familiaridad con un lugar. En este contexto, implica que los niños tuvieron la oportunidad de conocer o encontrarse con sus abuelos en Colombia durante el año pasado.
La conjugación del verbo en esta oración se ajusta a la persona (los niños) y al tiempo pasado (pretérito perfecto simple), proporcionando información precisa sobre la acción y cuándo ocurrió.