Answer:
He was the firs who claimed that organism is composed of cells.
Explanation:
Together with Theodor Schwann and Rudolf Virchow, a German botanist Matthias Schleiden was a cofounder of cell theory. He studied plant structure under the microscope and there he discovered that the basic units of plant organism are cells. He was also involved in the findings about the cell nucleus and the cell division process.
Matthias Schleiden, a German botanist, contributed significantly to the development of the cell theory. He proposed, with Theodor Schwann, that all living things are composed of one or more cells, the cell is the basic unit of life, and new cells come from existing cells. His work aided in the acceptance of cell theory as a foundation for biological understanding.
Explanation:The German botanist Matthias Schleiden contributed significantly to the development of the cell theory. Along with the zoologist Theodor Schwann, he proposed in the late 1830s the unified cell theory. This theory posited that all living things are made up of one or more cells, the cell is the basic unit of life, and new cells come from existing cells.
Schleiden made extensive microscopic observations of plant tissues and described them as being composed of cells. His studies of plant cells were particularly impactful because plant cells, with their visible, thick cell walls, were easier to observe than animal cells. Contrary to the contemporary belief, Schleiden put forth that cells did not form through crystallization, but rather through cell division.
Despite the fact cells were first observed in the 1660s by Robert Hooke, Schleiden's work, alongside collectives efforts of scientists like Schwann, Remak, and Virchow, was instrumental in the scientific community's acceptance of the cell theory as a foundation for understanding the basic structure of life.
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Why is peer review an important part of the scientific process?
(A.)
It permits scientists to have their work translated into other languages.
(B.)
It ensures that the quality of scientific research is maintained.
(C.)
It helps the scientist decide how to conduct the scientific investigation.
(D.)
It increases scientists’ knowledge about other disciplines of science.
I think B is the answer
Answer: B. It ensures that the quality of scientific research is maintained.
Explanation:
Peer review is the process of evaluation of research by people having similar study background and knowledge. It will be appropriately accomplished by experienced individuals. It involves studying the entire research writting by person other than the one who has done research. Such a person provides opinion and rectifies the mistakes. This process improves the quality of the research outcome.
An ecologist studying communities would study which of the following?A. The development of males' mating dances in a particular species of spider.B. Changes in the size of a mouse population after hawks, a main predator of mice, are introduced into the area where the mice live.C. Changes in the abundance of a particular species of frog in a portion of a rainforest over time.D. The effects of soil erosion on plant species found on the side of a mountain
Answer:
B. Changes in the size of a mouse population after hawks, a main predator of mice, are introduced into the area where the mice live
Explanation:
A community is defined as a group of populations of two or more different species which inhabit the same area at a certain time.
Community ecology is the study of the interactions between species in communities through time on a certain place. It includes the study of the distribution, structure, demography, and interactions between populations.
The purpose of this biology lab was to measure the oxygen consumption during seed germination as evidence of the rate of cellular respiration. Both germinating and non-germinating peas at different temperatures were used. Glass beads placed in one respirometer served as the control.
Considering the chemical reaction for cellular respiration, what must be included in the respirometer containing the germinating seeds?
A) oxygen
B) boiled water
C) oxygen and water
D) warm water and light
Answer:
C) Oxygen and water
Explanation:
In cellular respiration chemical reactions, the reactants are glucose and oxygen.
In the provided reactants, there is no oxygen provided, hence, we need oxygen for the reaction to occur.
Since we are preparing to measure oxygen consumption during germination, water has to be there for germination to take place, hence our option includes water.
Answer:
C.Oxygen and water
Explanation:
Two astronomers are looking at different supernovae. Supernova Alpha is 8 thousand light
years away. Supernova Charlie is 142 million light years away. With just this information,
what can these two scientists agree on
Supernova Charlie happened before Supernova Alpha because it took more time for light to reach Earth
Two astronomers are agreed on Supernova Charlie happened before Supernova Alpha, while other options are incorrect on the basis of light-years that measures the distances between two supernovae.
What do you mean by Supernova?Supernova may be defined as a large explosion that takes place at the end of a star's life cycle.
Supernova Alpha is 8 thousand light-years away, while Supernova Charlie is 142 million light-years away. So, the Supernova Charlie takes time to fall its light into the earth's surface as compared to Supernova Alpha.
Therefore, Two astronomers agreed on Supernova Charlie which happened before Supernova Alpha.
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Describe Two types of drugs and the negative impact the abuse of of these drugs can have on a person health
club drugs: lsd cause rapid heart rate
hallucinogens: bath salts causes hallucinations and can be dangerous to self and others
Drug#1: Marijuana
Marijuana is a drug used for medicine or personal uses that is made from part of a plant called Cannabis. Short-term side effects may include a decrease in short-term memory, dry mouth, impaired motor skills, red eyes, and feelings of paranoia or anxiety. Long-term side effects may include addiction, decreased mental ability in those who started as teenagers, and behavioral problems in children whose mothers used cannabis during pregnancy. There is a strong relation between cannabis use and the risk of psychosis.
Drug #2: Crack Cocaine
Crack cocaine, also known simply as crack or rock, is a free base form of cocaine that can be smoked. Crack offers a short but intense high to smokers. The Manual of Adolescent Substance Abuse Treatment calls it the most addictive form of cocaine. Crack cocaine is commonly used as a recreational drug. Effects of crack cocaine include euphoria, supreme confidence, loss of appetite, insomnia, alertness, increased energy, a craving for more cocaine, and potential paranoia (ending after use). Crack is such a strong stimulant that it creates severe stresses on the heart, the vascular system, the lungs and the brain. Blood vessels constrict from the stimulation of the drug and over time, can harden. Then when further stimulation occurs, these damaged blood vessels can rupture, leading to a stroke. Damage to the heart can lead to a fatal heart attack or cardiac arrest.
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What is the difference between genotype and phenotype? A. A genotype represents which alleles are carried, a phenotype is the visible trait. B. A genotype expresses the phenotype. C. A phenotype represents which alleles are carried, a genotype is the visible trait. D. They are the same thing.
Answer:
the answer is a
Explanation:
_______ has a greater partial pressure in the pulmonary capillaries than in the alveoli
Answer:
CO2
Explanation:
Diffusion is a simple process of molecular movement, from their higher concentration to the area with their lower concentration. The process of CO2 movement from the pulmonary capillaries into the alveoli is part of the gas exchange (together with oxygen movenent in opposite direction) and it is actually simple diffusion. Alveoli have huge surface area, thin cell walls and a lot of blood vessels around them. All of these are adaptations that facilitate gas exchange. There is a gradient in partial pressure of the CO2: it is much higher in the pulmonary capillaries than in the alveoili so it moves down its gradient-from the blood to the alveoli (exhale).
The bioenergy garden at Georgia Southern University is used to show plants that can be used __________.
Answer:
as biofuels that will not add any extra carbon dioxide into the atmosphere
Crossing over during prophase I of meiosis occurs between alleles on sister chromatids View Available Hint(s) Crossing over during prophase I of meiosis occurs between alleles on sister chromatids True False Part B Which of the following statements about gamete formation during meiosis is false? View Available Hint(s) Which of the following statements about gamete formation during meiosis is false? Complete linkage results in the formation of only parental gametes. Recombinant gametes contain combinations of alleles not found in the parent cell. Parental gametes can be formed only if there is no crossing over during meiosis. Parental gametes contain the same combinations of linked genes as found in the parent cell. Part C If two genes on the same chromosome exhibit complete linkage, what is the expected F2 phenotypic ratio from a selfed heterozygote with the genotype a + b + ⁄⁄ ab? View Available Hint(s) If two genes on the same chromosome exhibit complete linkage, what is the expected F2 phenotypic ratio from a selfed heterozygote with the genotype a + b + ⁄⁄ ab? 9:3:3:1 1:1:1:1 1:1 3:1 Provide Feedback
Answer:Crossing over during prophase I of meiosis occurs between alleles on sister chromatids View Available Hint(s) Crossing over during prophase I of meiosis occurs between alleles on sister chromatids True False Part B Which of the following statements about gamete formation during meiosis is false? View Available Hint(s)
Explanation:
Crossing over during meiosis I occurs between non-sister homologous chromatids, resulting in new allele combinations. The statement that parental gametes can only be formed with no crossing over is false. With complete linkage, the expected F2 phenotypic ratio from a selfed heterozygote is 3:1.
This exchange of DNA results in new combinations of alleles on the resulting chromosomes and is a crucial factor in the genetic diversity among offspring. Regarding gamete formation during meiosis, the statement that is false is: "Parental gametes can be formed only if there is no crossing over during meiosis." This is incorrect because it is possible to have parental gametes formed even if crossing over occurs, provided that the crossover does not involve genes that are linked. If two genes on the same chromosome exhibit complete linkage, the expected F2 phenotypic ratio from a selfed heterozygote with the genotype a+b+//ab is 3:1. Complete linkage means that the alleles for both genes are always inherited together because they are on the same chromosome and there is no recombination between them.
When the comb jelly, Mnemiopsis leidyi, was introduced into the Black Sea, its population exploded to 500 comb jellies per cubic yard in 1988. The jellies devoured all the zooplankton and fish larvae, drastically reducing the numbers of the native fish populations. This situation demonstrates _______.a.the difference between biotic and abiotic factors in an ecosystem.b.effects of local evolution or migration on an ecosystem.c.the impact of removing or adding organisms to an ecosystem.d.the types of interactions between organisms in an ecosystem. Please select the best answer from the choices provided
Answer:
c.the impact of removing or adding organisms to an ecosystem
Explanation:
Species that are introduced to new ecosystem by activity of the human are called introduced species or non-native species. As a consequence of their introduction, existing ecosystem might get affected and this is the negative impact, like in the case above. Introduced species might become invasive species when they spread too much.
Devon is being treated for anxiety. he is connected to an instrument that records muscle tension. his job is to try to reduce muscle tension. this is an example of: biofeedback training. emg training. relaxation training. self-instruction training.
I think it’s Self-Instruction training
Match each phrase to the form of energy it represents. chemical potential energy electric energy vibrational energy motion energy electric potential energy radiant energy
Answer:
fuel in a car's gas tank- Chemical Potential Energy
flash of lightning- Radiant Energy
Storm clouds- Electric Energy
vocalist singing- Vibrational Energy
recording sound with a microphone- Electric Potential Energy
raindrops falling- Motion Energy
Answer:
i got it wrong but you swith the 2 wrong.
Explanation:
HERE IT IS !!!! :)
In some cases, a population of one species disperses throughout an area, and over time, one species evolves and becomes more. In this example, one bird species, the founder species, becomes three. This is true for the Galapagos finches and the Hawaiian honeycreeper. Which answer BEST explains how natural selection contributes to this speciation event?
Answer:A
Explanation:i chose B and got it wrong
usa test prep
Answer:it’s A
Explanation:
What is the function of the diaphragm in a living pig?
Answer:
It separates the chest from the abdominal cavity and helps in respiration.
Explanation:
The diaphragm is a muscle structure located between the abdomianal cavity and the chest. It is involved in the process of respiration, it has the role to facilitates inhalation and exhalation. During the inhalation, diaphragm contracts and becomes flat (this pulls the air into the lungs). During the exhalation, diaphragm relaxes.
Imagine that part of a population of flies is blown from the California coast to an offshore island. The island flies have no contact with the mainland flies for 10,000 years. Then an earthquake rearranges the landscape and the island is rejoined to the mainland. The former island flies can now mingle freely with the mainland flies. If attempts at mating between flies from the two groups are successful and the resulting offspring grow up strong and healthy and have offspring of their own, you could conclude that _____.
Answer:
Speciation didn't occur over the past 10,000 years
Explanation:
We conclude this, since the two populations could mate (if speciation occurred, there would be no reprodution).
For example, in allopatric speciation which occurs as a result of geographic isolation, the part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations reach a high level of genetic divergence. They can no longer interbreed (reproduction between them) which means they become two different species (speciation).
New populations evolve as result of mutation, genetic drift and natural selection.
Intraspecific competition drives natural selection because A. individuals that can survive despite limited resources and competition will reproduce at a higher rate. B. other species in the same environment may have advantageous adaptations to the environment. C. individuals that work with other individuals of their species will have a higher chance of finding food. D. similar species in different environments often develop similar structures to carry out similar functions.
Answer:
The correct option is A.
Explanation:
Intraspecific competition refers to the type of competition in which living organisms belonging to the same specie compete for common limited resources. When the required resources that are needed to survive become scarce, then it is only the fittest organisms that will survive, these set of organisms usually found a way of adapting to the changes that occur in their environments and they usually go on to reproduce young ones that replace them. This process leads to evolution in which living organisms that possess the right traits are able to survive and reproduce in a particular habitat.
Answer:
A
Explanation:
The chart shows the densities of four substances.
Which list shows the order in which white light passes through these substances, from fastest to slowest?
Z, Y, X, W
W, X, Y, Z
W, X, Z, Y
Y, X, Z, W
Answer:
Y, X, Z , W
Explanation:
According to the density of the given substances, the order in which white light passes through these substances, from fastest to slowest is Y < X < Z < W. So, it's D.
What is Density?Density may be defined as the mass or quantity of substances in a unit volume. It describes the compactness of any substance.
The intensity of light passes is inversely proportional to the density, which means density decreases, and the intensity of light passes increases.
Therefore, the correct order is Y < X < Z < W.
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Most combinations of different ABO alleles result in complete dominance of one allele. Which combination results in codominance?IAiIBiIAIBiieither IAi or IBi
Answer:
IAIB
Explanation:
In the genetics of ABO blood types, there is one locus I, with three types of alleles A, B and i. A is dominant over i, B is dominant over i, A and B are codominant. Possible genotypes are:
A blood type: IAIA and IAi
B blood type: IBIB and IBi
O blood type: ii
AB blood type: IAIB
What type of biomolecule would you want to have if you were swimming across the English Channel
The strongest bio molecule
Use this information to answer the question(s) below. Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If she moves the promoter for the lac operon to the region between the beta galactosidase (lacZ) gene and the permease (lacY) gene, which of the following would be likely? Use this information to answer the question(s) below. Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome. If she moves the promoter for the lac operon to the region between the beta galactosidase (lacZ) gene and the permease (lacY) gene, which of the following would be likely? The three structural genes will be expressed normally. The cell will continue to metabolize but more slowly. Beta galactosidase will not be produced. The operon will still transcribe the lacZ and lacY genes, but the mRNA will not be translated. RNA polymerase will no longer transcribe permease.
Answer:
Beta galactosidase will not be produced
Explanation:
Normally in lac operon, promotor is located before genes and it is necessary for the initiation of transcription.
Lactose operon or lac operon (includes lacZ lacY and lacA genes) is found in some bacteria and the products of its genes are involved in lactose metabolism. So, this operon is active (genes are transcribed) when lactose is present and glucose is absent. The operon is regulated by the lac repressor which acts as a lactose sensor and catabolite activator protein (CAP) which acts as a glucose sensor.
When there is lactose (in the form of allolactose) lac repressor detects it and stops being repressor. This enables transcription.
CAP detects glucose (via cAMP) and activates transcription when glucose levels are low/
Moving the promoter for the lac operon to the region between the lacZ and lacY genes would likely result in a disrupted transcription process. RNA polymerase may only transcribe the genes following the promoter, effectively not producing Beta Galactosidase as its gene (lacZ) will not be reached.
Explanation:The lac operon, originally discovered in E. coli, is vital for the absorption and metabolism of lactose. It consists of three adjacent genes that are transcribed when lactose is present in the environment, allowing the bacterium to use it as a food source. The operon also contains a promoter sequence for RNA polymerase to bind and instigate transcription.
In your scenario, if the promoter for the lac operon was moved to the region between the beta galactosidase (lacZ) gene and the permease (lacY) gene, the most probable outcome would be a disturbance in the normal transcription process. As RNA polymerase typically binds to the promoter to begin transcription of all the genes in the operon, moving the promoter might result in only the genes that come after it, in this case only lacY, being transcribed. Therefore, Beta Galactosidase would likely not be produced since its gene (lacZ) would not be transcribed because it is before the promoter in this new setup. Consequently, RNA polymerase will no longer transcribe permease.
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White light shines on a piece of paper whose atoms are capable of absorbing orange, indigo, violet, yellow, red, and blue light. What color is the paper?
1)black
2)white
3)green
4)whatever color is created by the mixture of orange, indigo, violet, yellow, red, and blue light
4 whatever color is created by mixture of orange
Answer:
Green
Explanation:
The white light has 7 colors such as violet, indigo, blue, green, yellow, orange, and red. This is designated as VIBGYOR. Every object has some light-absorbing capacity. We can see colors when a particular color gets reflected by the objects. For example, in leaves, the green lights are reflected, so it looks green. The absorbed light is transferred into another form of energy i.e. heat energy. The reflected color gives the object its color that we see. If all the colors will absorb, it gives black color. If the piece of paper absorbs all the colors except green, the color of the paper is green. Because green light is reflected while others get to absorb.
Which organelle aids in the production and movement of proteins and other materials through the cell?
Cell or plasma membrane.
Answer: endoplasmic reticulum
Explanation: I just took the test and got it right
What is the definition of inertia? A. The tendency of an object in motion to decelerate. B. The amount of force required to reach the speed of light. C. The rate at which an object accelerates. D. The tendency of a body at rest to stay at rest or of a body in motion to remain in motion.
Answer:
The answer is D
The correct definition of inertia is the tendency of a body at rest to stay at rest or of a body in motion to remain in motion. Thus, the correct option is D.
What is Inertia?Inertia is the property of matter which causes it to resist the changes in velocity or direction of motion. According to the Newton's first law of motion, an object with a given velocity maintains that particular velocity unless they are acted on by an external force. Inertia is the property of the matter which makes this law hold true.
It is the tendency of a body at rest to stay at rest or a body in motion to remain in motion unless and until an external force is applied on it.
An example of inertia is when the bus stops suddenly, people in the bus fall forward. When the driver of a bus applies brakes of the bus suddenly, the lower part of the body comes to rest and the foot also comes at rest with the bus however the upper part of the body continues to move forward due to inertia of motion.
Therefore, the correct option is D.
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An individual’s unique constellation of consistent behavioral traits is known as
Answer:
An individual's unique constellation of consistent behavioral traits is known as PERSONALITY.
Explanation:
An individual's personality is made up of the combination of behaviors, attitude, habits, emotions and thoughts that an individual typically exhibit on a constant basis. These unique features are derived from the genetic make up of the individual and operating environmental factors. There are different types of personality and each type have its characteristics features.
An individual's unique constellation of consistent behavioral traits is known as personality. Personality encompasses enduring patterns of thought, emotion, and behavior that contribute to an individual's unique sense of self. These traits, which range from introversion to extraversion to conscientiousness, are stable over time and make each person distinctive.
Explanation:An individual’s unique constellation of consistent behavioral traits is known as personality. Personality is defined as an individual's consistent patterns of feeling, thinking, and behaving, making up what makes us distinctive from one another. From early childhood, these patterns emerge, manifesting in various ways, such as a person's activity level and their characteristic manner of interacting with others and the environment.
According to psychologists like Allport, personality traits are integral to an individual's sense of self, encompassing values, thoughts, feelings, preferences, and typical behaviors that are evident throughout much of their lifespan. These traits could be introversion, extraversion, conscientiousness, or a range of emotions like anxiety or self-assurance. The complexity of personality encapsulates dispositional traits, characteristic adaptations, and integrative life narratives, all situated within a cultural context.
Personality traits are thought to be stable over time and are not easily changed. They arise from neuropsychic systems that guide consistent behavior, reflecting a person's enduring, long-term characteristics. The original Latin meaning of 'persona' implies that a personality can be like a mask, representing or projecting specific traits of an individual's character.
In which oceanic zone do clams and crabs survive by burrowing in the sand?
Answer:
Mesopelagic zone
Explanation:
The Mesopelagic zone, also referred to as the Twilight zone, is the second oceanic zone from the top, lying just bellow the Epipelagic zone. It is occupying the waters at depths between 200 meters and 1,000 meters. The sunlight is only managing to reach the top few meters of this zone, while the rest is not receiving any sunlight, thus this zone is not supporting the plant species because they need sunlight for the process of photosynthesis. There are lot of animal species that live in this zone though, and they are ll very well adapted for it, often having hard shells or heavily scaled bodies, larger lungs and heart, and very well developed gills. Some of the animals that live in here are the crabs and the clams. They have developed all the needed characteristics to live in this zone. Because they are prey to lot of larger animals, both the crabs and the clams have started to use the soft sediments at the bottom as cover, digging themselves below it, and mostly managing to evade trouble and end up as food for the other species.
Which of the following best describes the significance of the TATA box in eukaryotic promoters?
A) It is the recognition site for a specific transcription factor.
B) It sets the reading frame of the mRNA.
C) It prevents supercoiling of the DNA near the start site.
D) It is the recognition site for ribosomal binding.
E) Its significance has not yet been determined.
Final answer:
The TATA box in eukaryotic promoters is essential as the recognition site for the transcription factor TFIID, integral to the formation of the transcription initiation complex.
Explanation:
The TATA box is a conserved promoter sequence found in both eukaryotes and prokaryotes, playing a crucial role in the initiation of transcription.
In eukaryotic promoters, the TATA box signifies where transcription factors assemble.
Specifically, it serves as the binding site for the transcription factor TFIID, which is a multi-subunit complex containing the TATA-binding protein (TBP) and various TBP-associated factors (TAFs).
The binding of TFIID to the TATA box is critical as it initiates the recruitment of other essential transcription factors and RNA polymerase II to form the transcription initiation complex. Therefore, the correct answer to the question is 'A) It is the recognition site for a specific transcription factor.'
Very short-term bursts of stress can have a beneficial effect on many biological systems, including the _____ system, which is your body's frontline defense against infection and cancer.
a. nervous
b. respiratory
c. immune
d. circulatory
Very short-term bursts of stress can have a beneficial effect on many biological systems, including the immune system, which is your body's frontline defense against infection and cancer.
Answer: c
Answer:
C) Immune
Explanation:
Very short-temr bursts of stress can have a beneficial effect on many biological systems, incuding the immune system, which is your body's frontline defense against infection and cancer.
What is the importance of the goblet cells in the large intestine
Goblet cells in the large intestine are important as they produce mucus which aids in the movement of feces, protects the intestine from harmful substances, and helps maintain a healthy environment within the intestine.
Explanation:The goblet cells in the large intestine serve several critical functions. Primarily, they produce and secrete mucus, which plays a vital role in the digestive process. This mucus serves to lubricate the intestinal walls, easing the movement of feces. This mucus layer also protects the intestine from the potentially harmful effects of the acids and gases that are produced by the bacteria present in the gut (enteric bacteria).
While the interior lining of the large intestine, or colon, largely consists of other cells known as enterocytes which absorb water, salts, and certain vitamins, the goblet cells complement these by contributing to the healthy functioning of the intestine with their mucous secretion. The importance of goblet cells thus lies in their contribution to the digestive process, and in helping to maintain a healthy intestinal environment.
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What is a long-term effect of the increased primary productivity of a terrestrial ecosystem?
A. The ecosystem will not be able to support as many tertiary consumers
B. It will decrease the amount of energy transferred to higher trophic levels
C. The ecosystem will be able to support more organisms at higher trophic levels
D. The ecosystem will become stagnant due to excess producers and organisms in higher trophic levels will die out
Answer:
C
Explain: USATEST prep said so
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Why do lunar and solar eclipses not happen every month?
Eclipses only occur during full and new moons.
Earth rotates around its axis faster than the moon.
The moon and Earth only travel through the penumbras.
The moon’s axis does not always align with Earth’s shadow.
I'm not 100% sure but I think the answer is D. The moon's axis does not always align with Earth's shadow.
D
Why do they not happen every month? A lunar eclipse occurs when the Moon enters the Earth's shadow. A solar eclipse occurs when the Moon's shadow falls on the Earth. They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.
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