An obstruction between the interior of the cell and its external environment is the cell membrane. The tendency of a molecule to pass through a cell membrane relies on its charge, concentration, and size.
Certain of the polarized molecules are so small that it can pass through the cell membrane, for example, let us consider a polarized molecule like water, whose small size permits it to diffuse freely through the cell membrane.
Other molecules, like that of oxygen, which exhibits no polarity and is small enough to readily pass through the cell. The molecules of sugar that comprise five or more atoms of carbon, are too large to pass via the cell membrane and need to be mediated with the help of transmembrane proteins.
Which of the following is a non-contact force?
Magnetic force
Frictional force
Force applied by a boatman on the oars
Force applied by a table on a book placed on it
the diagram to the right illustrates an embryonic stage of two organisms. which of the following can be determined by observing the embryos shown in the diagram?
a) the organisms share a common ancestors
b) the organisms belong to the same genus
c) the organisms are native to the same geographic areas
d) the organisms will grow into anatomically similar adults
Observing the embryos shown in the diagram can determine that the organisms share a common ancestor. (Option A).
What can be observed from embryos shown in the diagram?The diagram of the embryonic stage of two organisms can help determine that the organisms share a common ancestor. This is because embryonic similarities between unrelated species are often preserved, while differences become more pronounced in adults.
For example, all vertebrate embryos have gill slits and tails at some point in their early development, which disappear in adults of terrestrial groups but are maintained in adult forms of aquatic groups such as fish and some amphibians.
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Once the body has begun shivering, what happens to make it stop shivering?
01:04 An atom of carbon (C) forms covalent bonds with two atoms of axygen (O) to form carbon electrons of these atoms rearranged to form the bonds? dioxide. How are the valence
My answer will be that the valence of the Carbon atom is (+4) and that of each Oxygen atom is (-2). The CO2 molecule is formed by covalent bonds, in other words: C (+4) + O2 (-4) = 0.
define the word experiment
a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact
Answer:
An experiment is a technique that is carried out in order to prove or disprove a theory. Experiments reveal cause-and-effect relationships by illustrating what happens when a specific element is changed.
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Suppose you have the following set of data:
3 cm, 7 cm, 7 cm, 7 cm, 9 cm, 11 cm, 12 cm
What is the mode of the data set?
A. 7 cm
B. 8 cm
C. 9 cm
D. 10 cm
Answer by YourHope:
Hi! :)
What is the mode of the data set?
The answer is A) 7 cm!
:)
Answer: A. 7 cm
Explanation: the MODE is the most occurring data or the most frequently occurring data.
Option A (7cm) occurs most in the set
The largest number of child deaths worldwide occurs in __________.
Hi There!
Question - The largest number of child deaths worldwide occurs in __________.
Answer - Sub-Saharan Africa
P.S. Next time when you post a question please make sure to include all the given information in the question.
Hope This Helps :)
Final answer:
The largest number of child deaths in low-income countries is caused by pneumonia, diarrhea, and malaria. These are often linked with environmental factors like indoor air pollution, poor water quality, and malnutrition, and are preventable with better healthcare and sanitation practices.
Explanation:
According to the World Health Organization, the most frequent causes of death for children under five in low-income countries include pneumonia, diarrhea, congenital anomalies, preterm birth complications, birth asphyxia/trauma, and malaria. A significant number of these deaths can be prevented with interventions like immunizations, proper nutrition, access to safe water and food, and quality healthcare. The largest number of child deaths occurs due to environmental factors such as indoor air pollution from unprocessed solid fuels used for cooking and heating, poor water quality, sanitation, and hygiene that lead to diarrheal diseases, and infectious diseases like malaria, which is particularly prevalent in the African region. Malnutrition considerably contributes to child mortality and is often linked with environmental conditions. Due to the scarce healthcare resources in low-income countries, there is an urgent need for improved medical access to reduce these preventable deaths.
In this equation for photosynthesis, what happens to the second reactant in the photosynthetic process? 6CO2 + 6H2O → C6H12O6 + 6O2
Carbon dioxide is broken down in the Calvin cycle.
Water is split to drive NADP to NADPH conversion in the Calvin cycle.
Glucose is formed right after the Calvin cycle.
Oxygen is released as a gas after water is split.
Answer: The correct answer is- Oxygen is released as a gas after water is split.
Photosynthesis is a process by which green plants and animals synthesize their own food using CO₂ ( carbon dioxide) and H₂O ( water) in the presence of sunlight. It is divided into two phases that is light dependent ( occurs in thylakoid membrane of chloroplast) and light independent phase ( occurs in stroma of chloroplast)
In the first phase, energy from sunlight gets converted to chemical energy that is ATP and NADPH and water is splitted into electrons, protons and molecular oxygen. This occurs at PS II ( photosystem II), which is a structure present in the thylakoid membrane of chloroplast. The electrons released then participate in the electron transport chain.
Molecular oxygen is released in the atmosphere.
Size, shape, color, hardness and texture are all ______________ _______________ of matter. They can be observed by using your sense of sight, smell, taste, hearing, and touch.
A) sense properties
B) atomic properties
C) physical properties
D) chemical properties
Answer:
Physical properties
Explanation:
Physical properties can be observed directly using our senses without changing the substance and include size, shape, color, hardness, and texture.
Explanation:The correct answer to this question is C) physical properties. Physical properties of matter can be observed directly using our senses without changing the identity of the substance. Size, shape, color, hardness, and texture are all fundamental physical properties of matter that can be directly observed and measured through our senses of sight, smell, taste, hearing, and touch.
These properties provide valuable information about the external characteristics and behavior of substances without altering their chemical composition, making them essential for material identification, categorization, and practical applications in various fields, such as science, engineering, and daily life.
For example, a red apple is round, smooth, and has a certain size; these are all physical properties that we can observe just by looking at and touching the apple.
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Which is not a drawback of using fossil fuels ?
A. They release radioactive waste
B. They cause air pollution
C. They release greenhouse gases
D. They are non renewable
Answer:
A) They release radioactive waste.
Explanation:
Fossil fuels are non renewable resources do not release radioactive wastes / materials, but they do release greenhouse gases, causing air pollution.
Final answer:
The statement not associated with the drawback of using fossil fuels is that they release radioactive waste. Fossil fuels cause air pollution and release greenhouse gases and are non-renewable, but do not create radioactive waste. Thus, option A is correct.
Explanation:
The question asks to identify which statement is not a drawback of using fossil fuels. The correct answer is A. They release radioactive waste. This is a drawback associated with nuclear power, not fossil fuels. However, fossil fuels are known to cause significant air pollution, emit greenhouse gases, and are non-renewable resources.
Fossil fuels, such as coal, oil, and natural gas, take millions of years to form and hence are classified as non-renewable. The combustion of these fuels releases large quantities of carbon dioxide (CO2), which is a greenhouse gas that contributes to global warming. Additionally, the burning of fossil fuels results in the release of pollutants into the air, contributing to air pollution.
This is any cell in a living organism that is not part of reproduction.
Example: skin cells, muscle tissue
The answer to your question are the Somatic cells. They are all of the cells that are not related to reproduction. Hope this helped!
Answer: Somatic cell
Explanation:
A somatic cell is any cell forming the body of an organism that is not a gamete, germ cells or undifferentiated stem cell. For example, skin cell, muscle cell, blood cell and others. Thereby, they are all cells that make up an organism and are not used to form a new organism during reproduction. New somatic cells are created through mitosis, when a cell divides to form two identical diploid cells. The major purpose of this type of cell division is for growth and to replace cells.
Germ cell give rise to the gametes, which are reproductive cells (egg or sperm). They are haploid cells because they carry only one copy of each chromosome. They create new gamete cells through meiosis. And undifferentiated stem cells can divide to produce other cells that continue as stem cells or cells that are destined to differentiate.
Which alternate energy source would be expected to be the least dependent upon the weather
Nuclear energy is the alternative energy source least dependent upon weather, providing consistent, reliable power independent of external conditions. Geothermal energy also has low weather dependence but nuclear typically has higher capacity and broader implementation.
Explanation:The alternative energy source expected to be the least dependent upon the weather would be nuclear energy. Unlike solar and wind energy, which are subject to the whims of weather patterns and daylight hours, nuclear power does not depend on external weather conditions. Nuclear reactors can produce electricity continuously and are considered baseload power sources due to their ability to consistently supply power without interruption. While natural disasters can pose risks to nuclear power plants, the actual operation of a nuclear plant and its energy output are not typically affected by day-to-day weather.
Geothermal energy is another alternative energy source with low dependence on weather. It harnesses heat from within the Earth, which is both abundant and constant, meaning geothermal power plants can operate all year round without significant impact from weather conditions.
Therefore, comparing the two, nuclear energy would generally be less affected by the weather compared to even geothermal energy, because while both are non-intermittent, nuclear plants are often built to a capacity that can far exceed the energy generation of geothermal plants and are more widespread as a global energy source.
in a food web, what type of organism receives energy from every other type?
decomposer
Hope i helped!
have a good day!!
Modern corals are restricted to growing in warm, clear, well-lit, shallow water. Over the last two million years, coral reefs have undergone periods of great growth as well as mass extinctions. All BUT one catastrophic event has contributed to the changes in reefs over the years. That is
A) meteor impacts.
B) global ice ages.
C) destruction of the rainforest.
D) the rise and fall of sea level.
The answer is C, destruction of the rainforest.
Answer:
Option (C)
Explanation:
The corals are directly affected due to the destruction of the rainforest.
Over the last few million years, the corals have grown as well as destroyed. They also resulted in the damages and occurrence of various changes in the corals.
When the forest areas were destroyed and lost, the soil particles are washed away into the rivers and streams, carrying all its essential minerals. These minerals are then transported to the seas and oceans. This presence of minerals in excessive amount causes negative effect on the growth of corals. In addition to this, when these large amount of eroded materials are added to the ocean, it forms a cloud, as a result of which the sunlight cannot penetrate into the zone where corals are abundantly present.
Thus, the destruction of rainforest caused various changes in the corals reefs.
Hence, the correct answer is option (C).
A genetic mutation involving a single base causes an error that affects the sequence of the next 500 amino acids in a protein. Which type of mutation could have produced this type of error in the protein?
A)Silent
B)Nonsensse
C)frame-shift
Answer:
C)frame-shift
Explanation:
Since the protein-encoding DNA is divided into codons of three bases each, insertions and deletions can alter a gene to the point that its message loses its meaning. These changes are called the reading frame offset.
For example, consider the phrase: "The fat cat sat". Each letter represents a codon. If we delete the first letter and try to analyze the sentence in the same way, it doesn't make sense. In frame-shift, a similar error occurs at the molecular level, causing the codons to be analyzed incorrectly. This usually produces useless proteins.
Which structure allow fungi to obtain nutrients they need for survival? Ascospores, basidia, hyphae or lichen
The correct answer is: hyphae
Hyphae are long filamentous structures of the fungi responsible for the growth. Hypha branched and grouped together are called mycellium. Besides the growth hypha are involved in nutrition. For example, parasitic fungi have specialized hyphae for nutrient absorption within a specific host. Another example, arbuscules- specialized form of hyphae found in the roots of some vascular plants which absorb nutrients and water from the soil.
Consider the chromosome. Which is indicated by the letter a?
My answer will be that the letter "A" in the chromosome refers to "adenine", which is considered as one of the five nitrogenous bases that are part of the nucleic acids (DNA and RNA), which was named in 1885 by Albrecht Kossel.
When a nonmetal bonds with a nonmetal the result is a
A nonmetal (or non-metal) is a biochemical component that frequently requires metallic characteristics. Materially, nonmetals tend to have moderately low melting and boiling points, and densities, are essentially inelastic if solid.
When a nonmetal bonds with a nonmetal the result is a covalent bond. A covalent bond is a chemical bond which includes the sharing of electron pairs among atoms. Water (H2O) and carbon dioxide (CO2) are examples of covalent bonds. In H2O, one oxygen atom joins with two hydrogen atoms.
However they are habitually poor conductors of heat and electricity chemically, they manage to have approximately powerful ionization energy, electron relationship, and electronegativity charges.
Things too small to be seen with other microscopes may be viewed with an
Things too small to be viewed by a light microscope can be viewed with an Electron Microscope
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Think about the sources you would use to get information about scientific ideas. Which sources would you avoid? Check all that apply.
a magazine
an encyclopedia
a scientific journal
an advertisement
a TV show
You would avoid the following:
-An Advertisement
-A TV Show
-A Magazine
Answer: An an advertisement , a TV show, a magazine
Explanation:
When a person wants to get information about scientific ideas then he should not use a TV show, a magazine or an advertisement. It does not contains scientific ideas as a content.
The main content is pseudoscience and drama. The other sources like encyclopedia and scientific journal can be used as a source to get information about scientific ideas.
the science is classifying organisms is called _______.
A) anthropology
B) taxonomy
C) botany
D) genetics
Taxonomy
Hope That Helps!
The answer is B which is taxonomy
Match each description with the correct phase of mitosis. 1. The genetic material is duplicated. interphase 2. Chromosomes move to opposite ends of the cell. telophase 3. Chromosomes become visible; the spindle apparatus forms. prophase 4. The cell plate forms; the nuclear envelope is formed. anaphase 5. The chromosomes line up in the middle of the cell. metaphase
The mitotic process involves several stages, including the Interphase, Prophase, Metaphase, Anaphase, and Telophase, with each stage characterized by different processes involving genetic material and chromosomes.
Explanation:The mitosis process involves several phases. Phase 1, Interphase, is when the genetic material is duplicated in the cell. Second phase is Prophase, where the chromosomes become visible and the spindle apparatus forms. During the third phase, known as Metaphase, the chromosomes line up in the middle of the cell.
Fourth phase is Anaphase is when chromosomes move to opposite ends of the cell. Lastly, in the Telophase phase, the cell plate forms and the nuclear envelope is reformed.
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Here are the matches:
The genetic material is duplicated. - InterphaseChromosomes move to opposite ends of the cell. - TelophaseChromosomes become visible; the spindle apparatus forms. - ProphaseThe cell plate forms; the nuclear envelope is formed. - AnaphaseThe chromosomes line up in the middle of the cell. - MetaphaseInterphase:
This is the phase before mitosis where the cell prepares for division. During interphase, the genetic material (DNA) is duplicated in the nucleus. This ensures that each daughter cell will receive a complete set of chromosomes.Telophase:
This is the final stage of mitosis. During telophase, the chromosomes have reached opposite poles of the cell. Nuclear envelopes begin to form around the separated sets of chromosomes, and the chromosomes start to decondense back into chromatin.Prophase:
This is the first stage of mitosis. During prophase, the chromatin condenses into visible chromosomes. The nuclear envelope breaks down, allowing the spindle apparatus to form. The spindle fibers, which are made of microtubules, start to extend from opposite ends of the cell towards the center.Anaphase:
This is the stage where the sister chromatids of each chromosome are separated and pulled towards opposite poles of the cell. The spindle fibers shorten, pulling the chromatids apart. This ensures that each daughter cell receives an identical set of chromosomes.Metaphase:
During metaphase, the chromosomes line up along the equatorial plane (the middle) of the cell. This alignment ensures that each daughter cell will receive an equal number of chromosomes during cell division. The spindle fibers attach to the centromeres of the chromosomes, providing the tension needed for proper alignment.true or false: cellular respiration maintains the high metobolic rate in animals
What type of seashore has the most diversity
The correct answer is: rocky seashore.
A rocky seashore is an area (an exposed or sheltered area) of the seacoasts where solid rock predominates, (it also have boulders and pebbles). Rocky seashores are rich environments, meaning that many plants and animals are adapted to live in such habitat. It is challenging place to live, because of the continual cycle of changing tides.
A rabbit eats a carrot for food. What happens to the molecules of the food?
A.
The molecules get converted to energy and other types of molecules.
B.
The molecules get converted to energy only.
C.
The molecules get completely eliminated by the rabbit as waste.
D.
The molecules get destroyed in the animal's body.
Answer:
A
Explanation:
The carrots can have various percentages of different nutrient components from vitamins, carbohydrates, and proteins. The molecules serve different purposes in the rabbit's body. Proteins are usually digested into simple amino acids that can be used to make up other proteins. The carbohydrates are broken down into glucose that can be broken down do provide energy for the cells' biochemical processes. Excess glucose is turned into fats. Vitamins are absorbed and used for a myriad of functions such as ossification of bones.
You have learned in class that changing the pH or temperature of the environment can denature an enzyme. When an enzyme is denatured, it's shape changes, preventing it from forming an enzyme-substrate complex and slowing the reaction or even causing it to stop. Your group is curious about what might denature catalase. What would be the most appropriate hypothesis to use if you wanted to test conditions that could denature catalase?
A) If the amount of liver is increased, then the reaction rate will increase.
B) If the hydrogen peroxide is warmed, then the rate of the reaction will increase.
C) If the liver is placed in an acidic solution, then the reaction rate will decrease.
D) If the concentration of hydrogen peroxide is decreased, then the reaction rate will decreas
Answer:
C) If the liver is placed in an acidic solution, then the reaction rate will decrease.
Explanation:
Placing the pH in an acidic solution will cause denaturing of the enzyme catalase. Catalase is an enzyme which is in our liver and it breaks hydrogen peroxide into water and oxygen so as to protect our body from harmful effects of hydrogen peroxide. Catalase works best at 7 pH value. If we will place the liver in acidic solution it will cause denaturation of catalase. Denaturation alters the shape of the active site of enzymes. Active sites are the sites in enzymes which are meant for substrate binding. They have a shape which fits a specific substrate. So, if the shape of the active site will change due to denaturation, the substrate will no longer be able to fit into the enzyme and therefore reaction will not take place.
How would a geologist use absolute dating to determine the age of sedimentary layers?
A.by dating the age of several radioactive elements in a sedimentary rock layer
B.by dating the age of intrusions and extrusions near a sedimentary rock layer
C.by comparing the relative ages of several sedimentary rock layers
D.by identifying fossils in nearby intrusion and extrusions and determining their age
Answer is B
Hope this helps!
By dating the age of intrusions and extrusions near a sedimentary rock layer.
What is Sedimentary layers?Sedimentary rocks are one of three main types of rocks, along with igneous and metamorphic. They are formed on or near the Earth’s surface from the compression of ocean sediments or other processes.
In contrast to metamorphic and igneous rocks, which are generated deep beneath the Earth, sedimentary rocks are formed on or around the surface of the planet.
The impacts of wind and rain, which gradually reduce huge boulders into smaller ones, are included in erosion and weathering. Boulders and even mountains become sediments, such as sand or mud, as a result of erosion and weathering.
Therefore, By dating the age of intrusions and extrusions near a sedimentary rock layer.
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the processes of diffusion and transport are both used to?
1) break down molecules to release energy
2) move molecules into or out of cells of the body
3) bring molecules into cells when they are more concentrated outside of the cell
4) move molecules against a concentration gradient, using ATP molecules
what is the genotype for a recessive trait found in the female chromosome
Genotype for a recessive trait found on the female chromosome is b.
A female with two copies of a recessive allele on her X chromosomes is homozygous for an X-linked recessive trait. She will pass on this trait to her male offspring. Female carriers with one recessive and one dominant allele can pass on the carrier status or the disease to their children.
The genotype for a recessive trait carried on the female X chromosome is represented by two alleles, one on each X chromosome. When it comes to X-linked recessive traits, females need to inherit two copies of the recessive allele to express the trait. If they inherit only one recessive allele and one dominant allele, they are considered carriers and do not usually show the trait.
In humans, ailments such as certain forms of color blindness, hemophilia, and muscular dystrophy are examples of X-linked recessive conditions. A female who is homozygous for a recessive X-linked trait (meaning she has two copies of the recessive allele, one on each X chromosome) will pass this trait on to all of her male offspring. This is because males have one X and one Y chromosome, and they will inherit the Y chromosome from their father and the X chromosome from their mother. If a woman is heterozygous for the trait (having one recessive and one dominant allele), she may not express the disease but can still pass on the carrier status to her daughters or the disease to her sons.
Dedinition of unicellular
consisting a single cell
presence of a single cell
Uni means "one", and cellular is in reference to a biological cell, so unicellular means a single cell, this can be referring to one cell in a organism or if an organism has only one cell, like most bacteria and viruses.