The oldest of the supercontinents is called Rodinia and was formed during Precambrian between 1.1 billion and 750 million years ago. It as formed from parts of older and poorly inderstood supercontinents, being broken in the first period of the Neoproteozoic (Tonian Period). The scientists hypothesize that Rodinia as formed during the Proterozoic eon.
Fur color in animals is frequently controlled by more than one gene. However, brown fur in rabbits is dominant over white fur. A white female gives birth to all white rabbits, even though the father had brown fur. Show how this is possible. (5 pts)
Genotype: Phenotype
(Punnett square pls)
It is possible for a white female rabbit to give birth to all white rabbits even if the father had a brown fur. This is largely due to chance.
Chance in geneticsLet us first consider the cross in question.
Brown fur is dominant over white fur. Assuming the brown allele is B while the white allele is b, a brown rabbit will have a genotype of either BB or Bb. A white rabbit, on the other hand, can only have a bb genotype.
This means that the genotype of the female rabbit will be bb. If the genotype of the brown fur father is BB:
BB x bb
Bb Bb Bb Bb
All the offspring will have brown fur since B is dominant over b.
In other words, the genotype of the father rabbit can only be Bb.
Bb x bb
Bb Bb bb bb
Genotype ratio = 50% Bb : 50% bb
Phenotype ratio = 50% brown fur : 50% white fur
The chances of producing white fur offspring is 50% while that of brown fur offspring is also 50%. Given enough population of offspring, these chances will reflect.
However, with a small population of offspring, it is possible for either of the fur colors to be dominant. An all-white or all-brown fur offspring can result in a small population.
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Help help please help help me help help please help help
Answer: Q1. The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Q2. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer. Each phospholipid molecule has a head and two tails.
Hope this helps!
What kind of mathematical relationship seems to exist between the length of the ulna and the height of an individual?
(Pearson's correlation )interpreted a very high significant (P < 0.001) relation between the length of the ulna and the height. The regression equation was derived to estimate the height of an individual from the length of the ulna in males and females.
The kind of mathematical relationship that seems to exist between the length of the ulna and the height of an individual is Pearson's correlation.
What is Pearson's correlation?The Pearson correlation coefficient (r) is the most commonly used metric for determining a linear relationship. It is a number ranging from -1 to 1 that indicates the strength and direction of a link between two variables. When one variable shifts, the other shifts in the same way.
Pearson's correlation revealed a highly significant relationship between ulna length and height. The regression equation was developed to estimate an individual's height from the length of the ulna in males and females.
Therefore, the mathematical relationship that exists is Pearson's correlation.
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Which chemical leads to a pleasurable sensation when released in the brain, such as in response to nicotine?.
Your bloodstream carries nicotine to your adrenal glands, which are located above your kidneys.Your heart rate, respiration, and blood pressure all rise as a result of the glands releasing adrenaline.You experience a lot of positive emotions at once when taking adrenaline.
How does nicotine cause a pleasant feeling?
The body is stimulated by the adrenaline surge, which raises heart rate, blood pressure, and breathing rates.Nicotine stimulates the brain's reward circuits, which control reinforcement and pleasure perception, just like other substances do. The idea that the hunger and mood disorders linked to nicotine withdrawal may be caused by reduced serotoninergic transmission is supported by the fact that nicotine stimulates brain serotonin production while nicotine withdrawal has the opposite effect (4, 5). Cigarettes contain nicotine, a bioactive substance that stimulates the central nervous system's nicotinic acetylcholine receptors (nAChRs) to provide pleasant effects.Nicotine dependency results from the central nervous system's plasticity being altered by repeated nicotine consumptionNicotinic acetylcholine receptors that are found in the brain are where nicotine mostly manifests its effects.It increases Ach release and metabolism by stimulating presynaptic acetylcholine receptors.It also stimulates the dopaminergic system, raising the level of dopamine in the nucleus accumbens as a result. Dopamine, serotonin, norepinephrine, acetylcholine, gamma-aminobutyric acid, and glutamate are just a few of the neurotransmitters that are increased in release when nicotine binds to nicotinic receptors in the brain. Serotonin and dopamine may be released when nicotine is administered acutely (23), but chronic nicotine administration to rats has been demonstrated to reduce serotonin levels and serotonin biosynthesis (24, 25). Dopamine is released into the brain within seconds of inhaling cigarette smoke, vape mist, or chewing tobacco, which makes people feel good.People need to consume more and more cigarettes to achieve the same positive feeling over time as their brain starts to want the effects of Nicotinic receptor agonists include nicotine and ACh.Nicotinic receptors bind to nicotine and ACh, which results in a conformational shift that either opens or closes the receptors' ion channels, altering the functional state of the receptors. Nicotine, which is highly addictive, is a component of both smoking and vaping.It has been established that smoking causes cancer, which can be fatal.However, it has been established that vaping can lead to fatal lung diseases.The truth is that smoking is deadly.To learn more about nicotine refer
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How can a balanced reciprocal translocation that does not cause the person to have an abnormal phenotype cause that person’s offspring to have an abnormal phenotype?.
In a balanced reciprocal translocation, chromosomes are arranged in such a manner that no chromosome material gets gained or lost in the process.
A person who carries balanced translocation is usually unaware of the fact that he or she is having this sort of problem unless they give birth to a child. If one of the parents carries a balanced translocation, then it may possible that the child may inherit an unbalanced translocation in his life.
In an unbalanced translocation, the exchange of chromosomal material is unequal resulting into extra or missing genes. However, it is not necessary that if a parent has balanced translocation then he or she will always pass it on to the child.
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pls help due now!!!!!!!!!!
Answer:
a
Explanation:
which of the following statements is true about epigenetics
atp production in halophilic archaea that contain bacteriorhodopsin differs from atp production in cyanobacteria in that only cyanobacteria choose one: a. are found in water. b. use light to excite electrons. c. oxidize water. d. create a proton motive for
Option c ATP (Adenosine triphosphate) production in halophilic archaea that contain bacteriorhodopsin differs from ATP production in cyanobacteria in that only cyanobacteria oxidize water.
A relatively recent functional water product called oxidize water has oxygen added to it during the canning or bottling process. It is asserted that the additional oxygen has health advantages, such as facilitating the body's detoxification process and enhancing the metabolism of alcohol. The liver, blood, and immune system appear to be unaffected by prolonged oxygenated water ingestion. In addition, it causes a brief, modest rise in oxygen radicals in the blood. Water that has been oxygenated can be useful if you want to improve the health of your skin naturally. That's because it can aid in oxygenating your skin cells, which can aid in enhancing the tone and texture of your skin. Your skin gets the oxygen it needs when it is oxygenated, so your skin cells can
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terms used to describe factors (or sets of factors) that limit population size include group of answer choices density-dependent and independent limiting factors. extrinsic and intrinsic limiting factors. all of these are correct. environmental resistance.
Terms used to describe factors (or sets of factors) that limit population size include, density-dependent and independent limiting factors, extrinsic and intrinsic limiting factors. So option (d) all of the above is correct.
Limiting elements in the natural environment, such as access to food, water, shelter, and space, can alter animal and plant populations. Populations may also be affected by other limiting factors like as competition for resources, predatory behavior, and sickness.
A population's per capita growth rate changes—typically declines—with rising population density due to density-dependent limiting constraints. One illustration is how individuals of a group compete for scarce food.Independent of population density, certain factors affect per capita growth rate. Natural catastrophes like forest fires are examples.
Diverse limiting variables can interact in intricate ways to produce different patterns of population expansion. Some populations exhibit cyclical oscillations, where the population size varies cycle by cycle in a predictable manner.
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(20!!!!! PLS HELP)Select the type of inheritance pattern that is best described below:
Independent genes at four different loci are responsible for determining an individual’s HLA tissue tip, important in organ transplants and certain diseases.
a. Pleiotropy
b. Codominance
c. Polygenic Inheritance
d. Multiple Alleles
e. Incomplete Dominance
Polygenic Inheritance in which independent genes at four different loci are responsible for determining an individual's HLA tissue type, important in organ transplants and certain diseases.
Polygenic inheritance refers to the inheritance of a trait governed by more than one genes. More then three genes govern the inheritance of polygenic traits. Multiple independent genes have an additive or similar effect on a single quantitative trait.
Human height and color of skin and eyes occurs due to several genes, so it is an example of polygenic inheritance. The HLA system is inherited in a Mendelian manner and extensively polymorphic half are inherited from your mother and half from your father.
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The results of one experiment carried out by a research team would be considered valid if
A) All the members of the research team came to the same conclusion
B) The experiment had more than 1 variable
C) The experiment was repeated and same results were obtained each time
D) The experiment had no control set up
Answer:
c
Explanation: hope it helped
______ is a specialized type of cell division that produces cells that are genetically different from each other.
Meiosis is a specialized type of cell division that produces cells that are genetically different from each other.
Cell division is the process through which all cells are created from other cells. Meiosis is a specific type of cell division that generates reproductive cells like sperm and egg cells as well as plant and fungus spores. A "parent" cell generally divides into two or more "daughter" cells during this process. The parent cell can transmit its genetic material in this manner from generation to generation.
Meiosis is a specific type of cell division that takes place in sexually reproducing organisms. It generates reproductive cells like sperm, egg, and spores in plants and fungi, as was previously indicated. In humans, germ cells go through a process called meiosis to develop into sperm or eggs.
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Imagine there are zebras elephants and meadow argus butterflies in the local ecosystem. which biome are they most likely in? tundra tropical rainforest grassland temperate forest
Answer: the answer is grassland
cause Plains zebras live in savannas and temperate grasslands (plains). Savannas are large areas covered with grass and other plants, as well as some trees, while plains have grass and few to no trees at all. As you can imagine, plains zebras eat mostly grass and so are elephants are grassland animals too Due to their habitat, savanna elephants are often found grazing on grasses, but they also browse on a wide variety of plants and fruits. This selection varies depending on the time of year; during the rainy season the elephant will feed more on grass than during the dry season. hops this helps .
Explanation:
Which are sources of adult stem cells? Select three options.
Answer:
where’s the picture?
Explanation:
Answer:
It's 1, 3, 4
I got it right on the quiz
We know when we are moving up and down in an elevator because of the movemnt of tiny crystals in the
We know when we are moving up and down in an elevator because of the movement of tiny crystals in the otolith organs.
The sacculus and the utricle are the two otolith organs present in humans. These organs are responsible for sensing of gravity and also help in linear motions.
There are tiny crystals present in the otolith organs that help in linear motons or detecting when we are moving up or down. These crystals are termed as otoconia and are primarily made up of calcium carbonate.
These otoconia are responsible for detecting vertical movements and are present in the ear.
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Which activity of the polymerase is responsible for degrading the pre-genomic rna during hepatitis b dna replication?.
RNase H activity of the polymerase is responsible for degrading the pre-genomic rna during hepatitis b dna replication.
What is the function of polymerase?DNA polymerases' major function is to efficiently and properly replicate the genome in order to maintain the genetic code and ensure that it is faithfully passed down through the generations.
What does DNA polymerase do?A double-stranded DNA molecule is duplicated into two identical DNA molecules during the process of DNA replication, which is carried out by DNA polymerase. With the help of the polymerase chain reaction, generally known as PCR, scientists have been able to duplicate DNA molecules in test tubes.
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the superficial portion of the dermisgroup of answer choicesa and b are correct.a, b and c are correct.includes touch receptors called meissner's corpuscles.has decreased surface area due to the presence of dermal papillae.is called the papillary region.
Option a and b are correct.
the superficial portion of the dermisgroup is called the papillary region includes touch receptors called Meissner's corpuscles.
Skin-based touch receptors are a subtype of sensory neuron that respond to mechanical stimulus. They have specific ends. Touch receptors therefore communicate with the central nervous system about tactile inputs as a component of the somatosensory system.
Mechanoreceptors fall into one of three categories: baroreceptors, proprioceptors, or tactile. Due to the physical distortion of their plasma membranes, mechanoreceptors detect stimuli. They contain mechanically-gated ion channels, which respond to pressure, touch, stretching, and sound by opening or closing their gates. Merkel's discs, Meissner's corpuscles, Ruffini endings, and Pacinian corpuscle are the four basic tactile mechanoreceptors found in human skin; two of these structures are found closer to the skin's surface and two are deeper. Krause end bulbs, a fifth variety of mechanoreceptor, are exclusively found.
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which statement about linkage of genes is false? genes on the same chromosome that are far apart have a higher recombination frequency than those that are close together. crossing over results in recombinant phenotypes. crossing over between two linked genes can alter phenotypes of progeny. genes on the same chromosome are said to be linked. genes on the same chromosome assort independently.
The genes are most likely near to one another .The likelihood that two genes will be inherited together increases as they get more closely spaced.
Two genes are likely near to one another if they are on the same chromosome and infrequently assort independently. The alleles of two distinct genes are sorted into gametes independently of one another, according to Mendel's law of independent assortment. An allele for one gene does not affect the allele for another gene that a gamete acquires.
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How would the structure of nucleotides in a dna molecule affect the structure of amino acids in a protein
DNA determines which amino acids make a protein by the combination of three nucleotides. Each set of three nucleotides is called a codon and each codon corresponds to a particular amino acid, although an amino acid can be coded by multiple codons because there are only 22 aminoacids.
This is known as the genetic code:
A person can have hundreds of different type of cells because:different cells result from genetic variation in meiosis.different cell types have different genes.different cell types all have the same genes but have different genes active.None of these choices is correct.
Humans have specialized cells in the body. Each cell type performs a unique function. Humans have different type of cells with different structures and functions.
All the cells in a human's body contain the same DNA. However, the human body is composed of many different types of cells. Because of gene regulation, each cell type possess a different set of active genes although all the cells of the body contain the same DNA.
Answer - different cell types all have the same genes but have different genes active.
When the ground becomes saturated in a rain storm and the excess cannot be soaked up, the water will travel along the ground until it hits a low-lying area or a larger body of water. The water that is not absorbed into the ground, including the larger body of water, is _______.
A.
groundwater
B.
a puddle
C.
fertilizer
D.
surface water
The water that is not absorbed into the ground, including the larger body of water, is surface water and is denoted as option D.
What is Surface water?This is referred to as the body of water which is present on a terrestrial surface such as land etc.
Examples of surface water include rivers, oceans etc and they comprise of the water that is not absorbed into the ground to form what is known as ground water due to different types of factors and parameters which is therefore the reason why option D was chosen as the most appropriate choice.
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The bigger body of water, as well as the water that is not absorbed into the earth, is considered surface water. Thus, option D is correct.
What are the factor in formation of surface water?Rainfall is the principal source of surface water. It is a mixture of groundwater and surface runoff.
Groundwater and surface water are intimately related. Through the pores and fissures in the soil, sand, and rocks, some surface water seeps deep into the ground.
Runoff is the term for the surface water that results from precipitation and melted snow.
Therefore, The water that is not absorbed into the ground, including the larger body of water, is surface water.
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Question 4 of 10
What is the purpose of a conclusion?
A. To predict how something will turn out
B. To explain why the data support or reject the hypothesis
OC. To collect or analyze the experimental data
D. To make an educated guess about a particular question
SUBMIT
A conclusion's purpose is to forecast how something will turn out.
What is the experiment's conclusion?The purpose of the conclusion is to analyze what you have presented in the project, as well as to approve the problem statement and finish the project.It also includes the approval of the problem statement, information presented in the project and analysis, and new information that is not relevant to the project or presentation.The amount of conclusion can be changed by making it larger and analyzing more specific things, as well as editing more grammar errors. The conclusion can bring together the main points in your assignment.It establishes the premises and shows how they come together to support your claim, which means it briefly revisits each key point.So here correct answer is Option A) To predict how something will turn out.
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what makes this chart a climate representation and not one that shows the weather
A climate graph is a chart that displays the typical weather for a specific time period and area. A bar graph is used to display the amount of precipitation, while a line graph is used to display the temperature.
What is climate graph?Climate graphs display the typical levels of precipitation and temperature for a location. A line graph displays the temperature, while a bar graph displays the amount of rainfall. The months of the year run down the base of the representation, which is often on the same set of axes.
Why is a climate graph important?Scientists and meteorologists use climate graphs to determine long-term averages over a 12-month period. As a result, climate graphs are effective at illuminating a location's seasonal climate but are not a very excellent source for specifics about the location's climate.
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What is Chargaff’s Rule? How can we use that to compare species' DNA?
Answer:
equivalence rule
Explanation:
what would a man made biosphere built by you look like? how would it work?
A biosphere built by me will have the presence of plants, animals, microbes and other resources which are beneficial to the ecosystem.
What is a Biosphere?This is referred to as the portion of the earth which is characterized by the presence of different types of life forms.
A good biosphere must have a constant food supply which is ideal for the growth and survival of the organism. It is best to have plants as they are the primary producers and provide food to other animals. Microbes help in decomposition and other processes and will ensure they are present so as to reduce pollution.
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nitrogen is an essential element for living things, as demonstrated by the fact that nearly all fertilizers contain nitrogenous compounds. describe two macromolecules that have nitrogen. discuss their structural and functional roles to explain why nitrogen is essential for cellular life.
Two macromolecules that have nitrogen are nucleic acids and Amino acids.
When it comes to the chemical composition of living organisms, nitrogen is one of the most crucial components. Numerous macromolecules, including amino acids, fatty acids, and nucleic acids, are created using nitrogen. It is clear that nitrogen is necessary for life because amino acids are the building blocks of proteins and nucleic acids make up our genetic makeup.
Our bodies' muscles, tissues, and organs are all made of proteins, as are several hormones that are essential to their normal operation. Our DNA is carried by nucleic acids, which is essential for passing genetic information from one generation to the next.
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hi brainly people i need help due NOW
DUE NOW
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S
Looking at the pedigree chart, individual #8 must be heterozygous for the trait in question.
Human pedigreeThe trait shown by the pedigree is a recessive trait. Thus, individuals that phenotypically exhibit the trait will have two recessive alleles.
This means that individuals #1 and #10 in the pedigree are homzygous recessive for the trait.
Let us assume that the recessive trait is a while the alternate version is A. If it has been established that individual #1 is homzygous recessive, the genotype will be aa.
we are not sure if individual #2 is homzygous dominant or heterozygous.
If #2 is heterozygous, the cross between #1 and #2 will be:
aa x Aa
Aa aa Aa aa
If #2 is homzygous dominant, the cross would be:
aa x AA
Aa Aa Aa Aa
Whatever the genotype of #2, the offspring are either heterozygous or exhibit the trait. Since none of the offspring is shaded in the pedigree, it means they can only be heterozygous.
In other words, individual #8 can only be heterozygous for the trait in the pedigree.
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which organisms do not use nadh to feed electrons into mitochondrial electron transport chains? group of answer choices animals that do not maintain a constant body temperature plants animals that maintain a constant body temperature eukaryotic algae bacteria and archaea
The statement "animals that do not maintain a constant body temperature" is correct, they are the organisms that do not use NADH to feed electrons into mitochondrial electron transport chains.
Animals that do not keep a constant body temperature do not need NADH and do not consume NADH during respiration, as NADH is needed for maintaining a constant body temperature and is thus required by the organism.
The second method uses the respiration process used by bacteria and archaea, which uses NADH. The eukaryotic algae in the third option employ NADH in respiration since eukaryotes often do so. In the fourth option, animals must use NADH for respiration in order to keep their body temperatures constant.
If NADH is not available, oxidative phosphorylation reactions uncouple, which maintains the body temperature. This type of reaction is seen in animals that are hibernating as well as in newborn animals and people.
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in biological anthropology, why is it useful to examine sexual dimorphism? group of answer choices it is the study of sexual intercourse between primates. it varies with the pattern of competition among males. it relates to sexual courtship rituals in primates. it determines male and female social hierarchy.
It determines male and female social hierarchy
What is anthropology ?
Anthropology is the study of what makes people human. Anthropologists investigate all the various dimensions of the human experience from a holistic perspective. To learn how and what mattered to human groups hundreds or thousands of years ago, they turn to the past through archaeology.
Anthropology is the study of what makes people human. Anthropologists investigate all the various dimensions of the human experience from a holistic perspective. To learn how and what mattered to human groups hundreds or thousands of years ago, they turn to the past through archaeology.
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When considering different hypotheses, usually the
_______ one which can account for the
________ is the correct one.
Answer:
simplest, information