What caused the scientific community to accept Rutherford's atomic model?
Scientists explained the complete experiment.
Thompson approved Rutherford's experiment.
Rutherford recreated Thompson's experiment.
Other scientists repeated the experiment.
Answer:
The correct answer will be option other scientists repeated the experiment.
Explanation:
Ernst Rutherford is also known as "Father of nuclear physics" known for his planetary model of atom called "Rutherford model of the atom". He proposed and demonstrated the model in 1911 explaining that atom carries a small charged nucleus in the center which is surrounded by the tiny electrons.
The Rutherford's atomic model was accepted by the scientific community at that time because of the probable reason that his results were based on experiments which were also supported by the experiments of other scientists who repeated the experiments to check the accuracy and feasibility of the model. His experiments were repeated by a famous scientist and his student James Chadwick who discovered neutrons.
Thus, option other scientists repeated the experiment is the correct answer.
Which one of these are not an example of intracellular communication
1. a muscle cell maintains homeostasis
2. a nerve cell stimulates a muscle cell to contact
3. a muscle sell is coordinated
4. a signal is translated to cause muscle contraction
what does the Krebs cycle produce?
The Krebs cycle produces CO2, NADH, FADH2, and ATP (or GTP) for each acetyl-CoA that enters the cycle. It turns twice for each glucose molecule that initiates glycolysis, resulting in doubled yields of these products.
Explanation:The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is a key component of cellular respiration. In this cycle, each pyruvate molecule from glycolysis is first converted into a two-carbon molecule known as acetyl-CoA. The acetyl-CoA then enters the Krebs cycle and is further processed, leading to the production of CO2, and high-energy molecules such as NADH, FADH2, and ATP or GTP (equivalent to ATP in some organisms). During one turn through the cycle, the main outputs are:
Two molecules of CO2 (carbon dioxide)Three molecules of NADHOne molecule of FADH2One molecule of ATP or GTP through substrate-level phosphorylationAs the Krebs cycle turns twice per glucose molecule entering glycolysis, the eventual yield is doubled. Overall, the cycle plays an essential role in cellular energy production by transferring electrons to the electron transport chain, where most ATP is generated.
Explain the relationship between the environment, variation, and selection.
Changing environmental factors can cause certain traits to be favored through natural selection . This can lead to changes in genetic variation .
Changing environmental factors can cause certain traits to be favored through natural selection. This can lead to changes in genetic variation. This group are composed of the environment includes suppliers, customers, competitors, employees. They are the Environment Specific.
What is genetic variation?Genetic variations could be defined as the changes in the DNA segments or the genes which arise in the organisms of the same species. The environment in which the species lives or that favors organisms with certain traits.Changing genetic variation can lead to selection of certain traits to be favored by the environment.
Just through the natural selection, the organisms which has been considered as the better adapted to live in an environment are just able to live and pass on their characteristics to their offsprings. Hence, these organisms would carrying the favorable trait has been favored by the environment.
Therefore, This can lead to changes in genetic variation. This group are composed of the environment includes suppliers, customers, competitors, employees. They are the Environment Specific.
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I only have two questions, thank you! One difference between a point mutation and a chromosomal mutation is that ____
A. A point mutation affects the DNA of more genes than a chromosomal mutation
B. A point mutation can involve a insertion or deletion, but cannot result in a frameshift.***
C. A chromosomal mutation can change the number of chromosomes in a cell.
D. A chromosomal mutation is more likely to be passed on to offspring or daughter cells.
A mutation that involves one or a few nucleotides is called ____.
A. A mutagen B. An inversion C. A point mutation*** D. A translocation Thanks so much for your help! Happy Holidays! :)
Answer:
1. The most appropriate answer would be an option C.
A point mutation refers to the mutation or change that occurs at only one or a few nucleotides of the DNA.
Usually, a single nucleotide is substituted with the wrong nucleotide due to which only a single codon is affected.
However, it can cause frame shift mutation if insertion or deletion of nucleotide takes place.
In contrast, in chromosomal mutation long segment of DNA is involved. It may involve one or more genes. It mainly includes insertion, deletion, translocation, and inversion.
In addition, chromosomal mutation can cause change in the number or sets of chromosomes such as poliploidy, aneoploidy et cetera
2. The correct answer would be C. A point mutation
A point mutation refers to the mutation or change that occurs at only one or a few nucleotides of the DNA.
How do i determine a phenotype??
What could happen to the environment if there were no environmental scientists to monitor it? a. decline in air, land and water pollution; no one to ensure proper disposal of toxic wastes; decreased destruction of habitats; increase in species extinction; b. great increase in air, land and water pollution; no one to ensure proper disposal of toxic wastes; increased destruction of habitats; increase in species extinction; c. problems with enforcing the preservation of certain ecosystems and wildlife; great increase in air, land, and water pollution; decreased destruction of habitats; increase in species extinction d. increased destruction of habitats, decrease in species extinction; problems with enforcing the preservation of certain ecosystems and wildlife; prevent the depletion of Earth's natural resources
What process powers the movement of tectonic plates?
Which level of classification includes the most species?
kingdom
domain
genus
class
Domain is the highest level of classification. Domain includes EVERY species.
Explanation:
According to the Woese system, launched in 1990, the tree of life consists of three domains three domains are the Archaea, the Bacteria, and the Eukarya. Prokaryotic organisms apply either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells apply to the domain Eukarya.
The level of classification that includes the most species would be the domain.
Level of classification
The different levels of classification of living organisms from the highest to the lowest are:
DomainKingdomPhylumClassOrderFamilyGenusSpeciesThe number of organisms in each level decreases from the highest to the lowest. Thus, the domain has the highest number of organisms while the species has the lowest number.
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Regardless of where people live, they depend on resources produced in __________.
wilderness areas
ocean areas
urban areas
rural areas
What happens when organic molecules decompose
Domestic cats can begin reproducing as young as 6 months of age. Each female cat can produce two litters per year, containing multiple cats that can also begin reproducing early. What prediction can you make about an ecosystem in which cat populations are not controlled?
A. A predator for the cats would rapidly appear to match the population growth.
B. Small game would initially suffer but then quickly develop survival skills.
C. Within a few years, the population of cats would increase slowly, level off, and stabilize.
D. Within a few years, there would be many starving cats. ...?
If cat populations in an ecosystem are not controlled, they will likely experience rapid growth leading to overpopulation, resource depletion, and widespread starvation as the environment's carrying capacity is surpassed. Therefore the correct option is A.
Explanation:In an ecosystem where domestic cat populations are not controlled, we can make a solid prediction that, within a few years, there would be many starving cats. Cats reproduce at a high rate with a female cat being able to produce multiple litters each year, starting as young as 6 months of age. In the absence of natural predators or human control measures, cat populations undergo a geometric progression, quickly leading to overpopulation. This rapid increase eventually surpasses the carrying capacity of the environment leading to depleted resources, including food. Starvation and increased competition for resources can lead to high mortality rates, poor health, and a natural decline in population growth.
In natural ecosystems, population size is regulated by food availability, predation, disease, and environmental conditions. Without a corresponding rise in the number of predators or a significant increase in mortality factors, such as diseases or accidents, the unchecked growth of cat populations would likely result in resource exhaustion. Overpopulation issues, including starvation and increased competition, are known to occur in various species when they exceed the environmental carrying capacity.
There is a concept in biology known as the logistic model of population growth, which suggests that after a period of exponential growth, a population will start to level off as it reaches the carrying capacity of its environment. However, before this point is reached, overpopulation can result in negative outcomes such as widespread hunger, which in turn may cause the population to crash.
Final answer:
An uncontrolled domestic cat population within an ecosystem would experience exponential growth, initially impacting prey species before facing resource limitations leading to many starving cats. This aligns with option D, predicting dire consequences due to overpopulation and lack of natural controls.
Explanation:
Regarding the ecosystem impact of uncontrolled cat populations, it is important to consider the reproductive traits of domestic cats and the ecological balance. Domestic cats can begin reproducing at a young age, often around six months, and can produce multiple litters per year, each containing several kittens. When such reproductive rates are combined with the fact that these offspring can themselves reproduce within months, cat populations can grow exceptionally fast, leading to a phenomenon known as a geometric progression.
Without controls such as predation, disease, or limitation of resources, the cat population in an ecosystem could explode exponentially. Initially, this could cause a significant decline in prey species (such as small game) that cats hunt. Over time, the cat population would likely face resource limitations, particularly food scarcity, resulting in many starving cats. This answer aligns with option D: Within a few years, there would be many starving cats due to overpopulation and the associated stress on the ecosystem's resources.
why do plants need both chloroplasts and mitochondria
Plants need both chloroplasts and mitochondria because chloroplasts are responsible for photosynthesis, while mitochondria are the site of cellular respiration. Chloroplasts convert sunlight into chemical energy, specifically glucose, whereas mitochondria break down glucose to release energy for the plant's activities.
Explanation:Plants need both chloroplasts and mitochondria because they play complementary roles in the plant's energy metabolism. Chloroplasts are responsible for photosynthesis, the process by which plants convert sunlight into energy-rich molecules like glucose. Mitochondria, on the other hand, are the site of cellular respiration, where glucose is broken down to release energy for the plant's activities.
Chloroplasts contain pigments like chlorophyll that capture sunlight and convert it into chemical energy. This energy is used to produce glucose through the process of photosynthesis. The glucose is then stored as starch or used immediately by the plant for growth and other metabolic activities.
However, glucose alone cannot provide all the energy needed by the plant. This is where mitochondria come in. Mitochondria are known as the powerhouse of the cell because they produce more energy in the form of ATP through cellular respiration. They break down glucose and other organic molecules to release energy that is used by the plant to perform various functions like reproduction, growth, and repair.
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Plants need both chloroplasts and mitochondria because they serve different functions in the cell: chloroplasts carry out photosynthesis to produce glucose, while mitochondria carry out cellular respiration to convert glucose into ATP. These two processes work together to provide plants with energy.
Explanation:Plants need both chloroplasts and mitochondria because they serve different functions in the cell. Chloroplasts are responsible for carrying out photosynthesis, a process that converts light energy into chemical energy in the form of glucose. On the other hand, mitochondria are responsible for cellular respiration, a process that converts glucose into ATP, the energy currency of cells. These two organelles work together to provide plants with the energy they need to grow and carry out essential metabolic processes.
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why is the smooth muscle cell shaped the way it is? ...?
How was the the Hershey chase blender experiment conducted?
Final answer:
The Hershey-Chase blender experiment led by Hershey and Chase involved radiolabeling T2 bacteriophage DNA with 2P and proteins with 5S. They demonstrated that DNA, not protein, is the genetic material as radioactive DNA was found inside bacterial cells and the genetic information was used to produce new viruses.
Explanation:
The Hershey-Chase blender experiment was a crucial study in molecular biology, conducted by Alfred Hershey and Martha Chase, to determine whether DNA or proteins were the genetic material responsible for heredity. Hershey and Chase used T2 bacteriophage, a virus that infects bacteria, for their experiments. They grew the viruses in cultures containing radioactive isotopes: 2P for DNA and 5S for proteins, since DNA contains phosphorus but no sulfur and vice versa for proteins. The viruses thereby incorporated these isotopes into their DNA or proteins, respectively.
Two separate sets of E. coli bacteria were then infected with the radiolabeled phages. After allowing the phages to attach to the bacteria, the mixtures were placed into a blender to separate the phage coats from the E. coli cells. The mixtures were then centrifuged, so the heavier bacteria formed a pellet, and the lighter phage particles and detached coats remained in the supernatant. In the set with 5S-labeled proteins, the radioactivity was found in the supernatant, indicating that the protein did not enter the bacteria. Conversely, in the set with 2P-labeled DNA, the radioactivity was detected in the pellet, indicating that the DNA entered the bacteria and therefore was the material responsible for directing the production of new phage particles. Thus, Hershey and Chase concluded that DNA is the molecule that carries genetic information.
Which phase is the busiest phase of the cell cycle
An unconformity is a ______ of rock.
Answer;
-Missing layer
An unconformity is a Missing layer of rock.
Explanation;
-Unconformity is a break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time. The missing unit of rock is called an unconformity, defined as a period of either non-deposition or erosion separating two stratigraphic units of rock with different ages.
-There are three types of unconformity which are; disconformity, Nonconformity, Angular unconformity. Disconformity is sequence of parallel rock is missing. It is hard to see but very common. Nonconformity is a sedimentary rock layers lie on top of an eroded surface of a non-layered igneous or metamorphic rock. Layers are on top of non-layered rock. Angular unconformity exists between horizontal rock layers and eroded tilted or folded rock layers. The tilted or folded layers were eroded before horizontal layers formed above them.
What might happen to the human heart during a trip to Mars?
A. stop working completely
B. become too weak to pump blood
C. expand and become too large to work properly
Answer:
B. becomes too weak to pump blood
Explanation: I just took the test.
Four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200N. Force 2 is pushing to the left at 500N. Force 3 is pushing to the right at 100N. Force 4 is pushing to the left at 50N. What's the net force acting on this object?
A.0N
B.650N
C.850N
D.250N
Answer:
250N
Explanation:
Force may be defined as a push or pull of an object. Force can change the shape, size and movement of any object.
Net force = Total force acting on left - Total force acting on right
Net force=Force 2 + Force 4 - Force 1 + Force 3
Net force=(500+50) - (200+100)
Net force= 250 N.
Thus, the correct answer is option (D).
A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes the bird?
herbivore, decomposer
producer, heterotroph
carnivore, consumer
autotroph, herbivore
The answer is indeed C "Carnivore, Consumer."
HELP ASAP
1.which of the following is always single stranded?
a dsRNA
B DNA
C mRNA
D DNA AND RNA
2 which of the following is a difference between DNA and RNA?
a RNA has thymine
b RNA contains lipids
c most types of RNA are double stranded
d they have different sugars
3 which of the following bases are found in RNA but not DNA?
a guanine
b cytosine
c adenine
d uracil
molecules "pumped" in or out from low to high concentration:
Answer:
Active Transport
Explanation:
During active transport, molecules move from an area of low concentration to an area of high concentration. This is the opposite of diffusion, and these molecules are said to flow against their concentration gradient. Active transport is called "active" because this type of transport requires energy to move molecules.
Balance the following chemical equation. CCl4 → C + Cl
Answer: The balanced reaction is CCl4 → C + 4Cl
A balanced chemical equation is the one, which contains equal number of atoms corresponding to each element participating in the reaction and having same charge for the reactants and the products.
In the given reaction CCl4 → C + Cl, the number of chloride atoms are imbalanced on both sides as it is four on the reactant side while it is one on the product side.
Thus, the balanced reaction for this is-
CCl4 → C + 4Cl
Organisms use different types of adaptations to aid in their survival.Which of the following is an adaptation that would not help a lion to catch its prey? a. group hunting b. hyoid bone adapted for roaring c. camouflage d. keen eyesight
Answer;
B. hyoid bone adapted for roaring
Explanation;
Many organisms are well adapted to their living and non living factors due to physiological, behavioral or structural adaptations which increases the organisms chances of survival and reproduction.
Behavioral adaptations are responses made by an organism that help it to reproduce or survive.Physiological adaptations are body processes that helps an organism to survive or reproduce Structural adaptations are features of an organism’s body that helps it to survive or reproduceIn our case, Lion has many adaptations that help it survive and help it catch its prey, these include, group hunting, camouflage and keen eye sight, however, presence of hyoid bone adapted for roaring does not help it in catching its prey.
Once proteins have been produced at the ribosomes what two organelles work together to aid in the secretion process
Answer:
Endoplasmatic reticulum and Golgi apparatus.
Explanation:
The endoplasmic reticulum is a cytoplasmic organelle present in animal and plant cells. This organelle is formed by bags and tubes and has the following functions: production of lipids, detoxification, storage of substances and production of proteins.
The golgi apparatus, on the other hand, is also a cytoplasmic molecule present in eukaryotic cells. Its functions are: storage of substances, transport of substances and the export of substances produced in the Endoplasmic Reticulum.
For this reason, we can say that after proteins are produced in the ribosomes, two organelles work together to help the endoplasmic reticulum and the golgi apparatus in the secretion process.
Which picture illustrates the anaphase stage of mitosis?
The picture that illustrates the anaphase stage of mitosis :
A) Image A
The picture that illustrates the anaphase stage of mitosis is image A.In anaphase stage of mitosis:Chromosomes divides into half and is carried by spindle fibres.Constriction start to appear.Spindle fibres disappear.When the cell is in the stage of mitosis, it means that the spindle fibers have separated and are beginning to move towards the poles of the cell.Therefore, the correct option is A.
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What property of water results from the high cohesion between water molecules?
Surface tension
Low density as a solid
Low vapor pressure
High heat capacity< not this
Answer: Surface tension
Explanation:
Surface tension is the net downward force acting on the surface of liquids due to the cohesive nature of liquids.
Water molecules are bonded by strong hydrogen bonding between the hydrogen atom and the electronegative oxygen atom. Thus water molecules present on the surface are strongly attracted by the molecules present below the surface and thus act as a stretched membrane.
The surface acquires a minimum surface are and thus acquire a spherical shape.
Heat capacity of water is high due to strong hydrogen bonding between water molecules.
Thus surface tension of water results from the high cohesion between water molecules.
use photosynthesis in a sentence
Photosynthesis is the process by which green plants make glucose using solar energy, carbon dioxide, and water. This process takes place in the chloroplasts and results in the production of glucose and oxygen.
Photosynthesis is a process by which green plants synthesize glucose (C6H12O6) from carbon dioxide (CO2) and water (H2O) using solar energy. It takes place in the chloroplasts of plant cells, which contain chlorophyll, a pigment that captures light energy. During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen, which are essential for their growth and energy needs.
Full question: Use photosynthesis in a sentence. Define it.
What happens when a sound wave moves from water to air?
In the air, the sound coming from water will slow down.
The sound travels by the vibration of the molecules and particles present in the medium. The water is dense medium and the molecules present in water are closely packed as compared to the air.
Due to close packing in the water molecules, the sound travels faster as compared to the air, as the molecules in the air are quite apart. So, the speed of sound coming from water to air would be slow down.
Imagine a population of rabbits with fur color that ranges from black to white. If this population were put in an area that has dark rocks that camouflage the black rabbits, as well as light stones that hide the white rabbits, what would most likely happen to the gray rabbits?
Gray rabbits would blend into either environment.
Gray rabbits would adapt to have black fur.
Gray rabbits would be eliminated by predators.
Gray rabbits would mutate to white fur.
The correct answer is option (C) Gray rabbits would be eliminated by predators.
Camouflage is an adaptation by organisms allowing them to blend with the environment. This helps them in surviving or escaping from their predators. It can be throught coloration or developing a particular pattern or mimicry.
The example given above is a type of camouflage through concealing coloration. Concealing coloration includes having a fixed camouflage and changing the camouflage depending on the environment. Grey rabbits cannot exhibit camouflage as the backgroud is dark rocks and light stones. As a result, these rabbits are clearly visible to the predators and get elimiated by them.
Gray rabbits in an environment with dark and light stones for camouflage would likely be at a disadvantage and potentially eliminated by predators over time. In a hypothetical situation where gray rabbits blend well, they might survive through diversifying selection.
If a population of rabbits with fur that ranges from black to white were put in an area with dark rocks and light stones, creating camouflage for the black and white rabbits respectively, the gray rabbits would likely be at a disadvantage. Since they do not blend in as well with either the dark rocks or the light stones, their intermediate color would provide less camouflage, making them more susceptible to being spotted by predators. This selective pressure could potentially lead to the gray rabbits being eliminated by predators over time.
However, in a hypothetical population where gray and Himalayan (gray and white) rabbits are better able to blend with a rocky environment than white rabbits, the presence of diversifying selection might favor the survival of these gray variants. In reality, the outcome would depend on the specific environmental conditions and the ability of the rabbits to hide or adapt.