Answer: It controls hunger and thirst and some of the most basic body functions, such as body temperature, blood pressure, and breathing. The brain is protected by the bones of the skull and by a covering of three thin membranes called meninges. The brain is also cushioned and protected by cerebrospinal fluid.
Explanation:
The number of cells in a tumor doubles every 4.5 months. if the tumor begins with a single cell, how many cells will there be after 3 years? after 5 years?
The number of cells after 3 years will be 21,618 and the number of cells after 5 years will be 16,777,216
First, we should determine the number of months in 3 years and 5 years.
As there are 12 months in a single year
Therefore, 1 year = 12 months
So we can determine the number of months in 3 years and 5 years as follow:
3 years = 12 x 3 =36 months
5 years = 12 x 5 = 60 months.
The equation for this question can be given as:
\(2^\frac{months}{2.5}\)
For three years, the equation will be,
\(2^ \frac{36}{2.5}\) = \(2^{14.4}\)
\(2^{14.4}\) = 21, 618 cells
For five years, the equation will be,
\(2^ \frac{60}{2.5}\) = \(2^{24}\)
\(2^{24}\) = 16,777,216 cells.
Therefore, the number of cells after 3 and 5 years will be 21,618 and 16,777,216 respectively.
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(A)Sanitary landfill(B)Incineration(C)Discharge to sewers, streams, and rivers(D)Chemical treatment(E)Biological treatmentWhich method would be suited for neutralizing the acidic components of waste?ABCDE
The best method would be suited for neutralizing the acidic components of waste is Chemical treatment. Option D is correct.
Chemical treatment methods involve the use of chemicals to neutralize or alter the chemical properties of waste, including acidic components. This can be achieved through various chemical reactions that result in the neutralization of acids, changing their properties to less harmful forms.
Chemical treatment methods are commonly used in waste management practices to treat hazardous waste or other types of waste that may contain acidic or harmful components. Examples of chemical treatment methods include the addition of neutralizing agents, such as lime or sodium hydroxide, to waste to raise the pH and neutralize acidic components.
Hence, D. is the correct option.
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In contrast to transporters, ion channels in cellular membranes .... Group of answer choices interact strongly with the molecules they transport undergo a conformation change with every solute they transport can only mediate passive transport form pores that are always open are always controlled by voltage
In contrast to transporters, ion channels in cellular membranes can only mediate passive transport form pores.
Only in order to open a membrane pore that enables a certain ion into the membrane do channel proteins undergo a conformation in the membrane. In contrast to carrier proteins, the ion will only move along its concentration gradient. It has been discovered that all membrane transport proteins that have been in-depth study are multipass transmembrane proteins, meaning that their transporters chains repeatedly pass through the lipid bilayer. These proteins allow certain hydrophilic solutes to traverse the membrane without coming into touch with the hydrophobic interior of the lipid bilayer by establishing a continuous protein pathway across the membrane.
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What is the best reason for having a strong bypothesis?
Answer:
C
Explanation:
I searched it online and it confirms my notes too
Genomic libraries have many uses in genetics research. Which of the following statements is FALSE? They are a collection of different restriction enzymes. The library is made by molecular cloning. They are collection of clones. They are a collection of plasmids. Each cloned plasmid in the library contains a different segment of the genome.
Genomic libraries have many uses in genetics research. The FALSE statement regarding genomic libraries is: They are a collection of different restriction enzymes.
Genomic libraries are collections of clones or vectors that contain genomic DNA inserts. Each clone contains a segment of the DNA of the species of interest. Researchers can create genomic libraries by cloning large genomic DNA fragments into a suitable vector. These libraries can be used to identify and isolate specific genes or DNA sequences of interest. Therefore, option A, "They are a collection of different restriction enzymes" is false. The correct statement is that genomic libraries are made by molecular cloning. They are a collection of clones and a collection of plasmids. Each cloned plasmid in the library contains a different segment of the genome.
A full collection of cloned DNA snippets that make up an organism's whole genome is known as a genomic library or gene bank. It represents every gene, including exons, introns, and expressed and non-expressed forms. Genomic libraries can be preserved for a long time, and copies can be used for analysis.
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the german physician robert koch provided evidence to support the germ theory of infectious disease. koch isolated bacteria from a cow with anthrax, then injected the bacteria into a healthy mouse. to support germ theory, what must have happened to the healthy mouse?
He did this by experiment with anthrax. Using a microscope, Koch analysed the blood of cows that had failed of anthrax. He marked rod-shaped bacteria and supposed they caused anthrax.
What does anthrax do to a human?Anthrax induces skin, lung, and bowel disease and can be fatal. Anthrax is analysed using bacterial cultures from infected tissues.
There are 04 kinds of anthrax: cutaneous, inhalation, gastrointestinal, and injection.
Anthrax is cured by antibiotics.
Thus, He kept rod-shaped bacteria and supposed they caused anthrax.
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Which body system transports the hormones that control the menstrual cycle?
Answer:
The hormone responsible for these changes is progesterone, which is manufactured by the corpus luteum. Under the influence of progesterone, the uterus begins to create a highly vascularized bed for a fertilized egg. If a pregnancy occurs, the corpus luteum produces progesterone until about 10 weeks gestation.
what contribution do mendel's conclusions concerning inheritance make to the understanding of evolutionary processes? multiple choice question.
Mendel's conclusions concerning inheritance contribute significantly to the understanding of evolutionary processes.
Mendel's experiments with pea plants led him to develop his laws of inheritance, which provided a framework for understanding how traits are passed down from generation to generation. His discovery of dominant and recessive traits, as well as the segregation and independent assortment of genes, helped explain why certain traits may become more prevalent in a population over time.
In particular, Mendel's work contributed to the understanding of natural selection and genetic variation, which are key components of evolutionary processes. By understanding how traits are inherited, scientists can better understand how populations evolve and adapt over time. In addition, his laws of inheritance have been applied to the study of human genetics, leading to a better understanding of inherited diseases and the potential for genetic therapies.
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3. The Concorde jet was a supersonic plane created in 1976 to speed transportation across the ocean. It traveled at twice the speed of sound, shortening a normal seven- to eight-hour transatlantic trip to three and a half hours. However, the Concorde still had to fly in the same atmospheric conditions as every other plane. Given this information, answer the following questions (15 points):
A. In which layer of the atmosphere did the Concorde cruise? (5 points)
B. What are the characteristics of this layer that make it the ideal layer for the Concorde to travel? (5 points)
C. Why wouldn't it travel higher? (3 points)
D. Why wouldn't it travel lower? (2 points)
The troposphere wouldn't sustain the Concorde during a cruise in the stratosphere. Buildings and other objects would be struck by the Concorde as it flew so low.
What transpires when a supersonic aircraft, such as a Concorde, exceeds the speed of sound?A sonic "boom" or shock wave was produced when the aircraft exceeded the speed of sound, or about 760 mph, and it struck the ground with a loud thud. Federal laws in the United States prohibit all commercial aeroplanes from travelling faster than the speed of sound because it is so terrifying for people on the ground.
In 1976, how much did a Concorde ticket cost?It was the most expensive high-tech mode of air travel in the globe from 1976 to 2003: $1,500 for the last year, and $12,000 for a roundtrip in the first.
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Fill in the blank
The mutation in ________ affected the structure and function of _______in way that affected.
The mutation in DNA affected the structure and function of proteins in a way that affected cellular processes.
The mutation in a specific gene sequence affected the structure and function of proteins coded by that gene in a way that disrupted normal cellular processes.
Depending on the location and severity of the mutation, this could result in a range of effects from mild to severe.
For example, if the mutation affected a protein involved in cell division, it could result in abnormal cell growth and potentially lead to cancer.
Alternatively, if the mutation affected a protein involved in neurotransmitter release, it could result in neurological disorders such as Parkinson's disease.
Ultimately, the specific effects of the mutation would depend on the gene and protein involved, as well as the location and severity of the mutation.
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Which best explains what happens to the number chromosomes after meiosis I?
diploid to diploid
diploid to haploid
haploid to diploid
haploid to haploid
Answer:
i belive its B, so sorry if im wrong!..
Explanation:
Answer:
B
Explanation:
In Sl units, the standard unit of force
In Sl units, the standard unit of force newton, symbol N.
The base units relevant to force are:
The metre, or m, is a unit of length.
The kilogram (kg), a unit of mass
second, or s, is a unit of time.
The change in momentum rate is referred to as force. This is comparable to mass x acceleration for a constant mass.
Therefore, 1 N equals 1 kilogram m s-2 or 1 kg m/s2.
Force is denoted by the letter F.
A force is an effect that can alter an object's motion in physics. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F.To know more about force visit:
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PLEASE HELP!!! MARKING PEOPLE AS BRAINLIST LOTS OF POINTS
Answer:
A. Crocodile
Explanation:
This is because we can see that when the Crocodiles are at <1% of their total lifespan, they have the least amount of remaining survivors out of 100.
in the sense of alternation of generations, how many generations are included in a mature pine seed?
In a mature pine seed, there are two generations of cells included. The first generation of cells is the diploid generation, which contains two sets of chromosomes.
What is diploid generation?Diploid generation is the stage of a life cycle in which an organism has two sets of chromosomes. This is the most common type of generation for eukaryotes, which are organisms with complex cells that contain a nucleus. During diploid generation, organisms contain two copies of each chromosome, one copy from each parent. This stage is preceded by the haploid generation, which contains only one set of chromosomes, and followed by a meiotic generation, during which the chromosomes replicate and recombine.
This generation is responsible for the production of haploid cells, which contain only one set of chromosomes. The haploid cells then divide to form the second generation of cells, which are the haploid spores. These spores can then go through another cycle of division to form a new diploid generation, which starts the cycle again. Thus, there are two generations of cells included in a mature pine seed.
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Which evolutionary forces a. cause an increase in genetic variation both within and between populations? b. cause a decrease in genetic variation both within and between populations? c. cause an increase in genetic variation within populations but cause a decrease in genetic variation between populations?
These evolutionary forces interact to shape the genetic variation within and betwen populations, which in turn affects the evolution of species over time.
The evolutionary forces that cause an increase in genetic variation both within and between populations are mutation, gene flow, and recombination. Mutation is a spontaneous change in DNA sequence that creates new alleles.
Gene flow is the movement of genes between populations through migration or interbreeding, which introduces new alleles into a population. Recombination occurs during sexual reproduction when genes from two parents are combined, creating new combinations of alleles.
The evolutionary forces that cause a decrease in genetic variation both within and between populations are genetic drift and natural selection. Genetic drift is the random fluctuation of allele frequencies in small populations, leading to the loss of genetic diversity. Natural selection eliminates alleles that are less fit for survival and reproduction, reducing genetic variation over time.
The evolutionary force that causes an increase in genetic variation within populations but causes a decrease in genetic variation between populations is genetic differentiation. Genetic differentiation occurs when different populations become genetically isolated from each other, leading to the accumulation of unique alleles in each population.
However, this process can also lead to a reduction in gene flow between populations, resulting in a decrease in genetic variation between populations.
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Human DNA contains 3 billion base pairs
DNA replication takes 8 hours
DNA polymerase adds new nucleotides at a rate of 80
nucleotides/second
• How many replisomes must be working at the same time on
one strand of DNA to finish within 8 hours?
We would need approximately 2604 replisomes working simultaneously on one strand of DNA to replicate the entire 3 billion base pairs within 8 hours.
What is the replisome?The replisome is a complex of proteins that are responsible for carrying out DNA replication. To create two single strands of DNA, the replisome first unwinds double-stranded DNA. A brand-new complementary sequence of DNA is created for each of the resulting single strands.
To calculate the number of replisomes needed to replicate the entire 3 billion base pairs within 8 hours, we can use the following formula:
Number of replisomes = (total number of nucleotides) / (nucleotides added per second per replisome x seconds in 8 hours)
First, we need to calculate the total number of nucleotides in the DNA:
3 billion base pairs x 2 strands/base pair = 6 billion nucleotides
Putting in the values:
Number of replisomes = (6 billion) / (80 nucleotides/second/replisome x 28,800 seconds)
Number of replisomes = (6,000,000,000) / (2,304,000)
Number of replisomes = 2,604
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Which structure pumps out excess water and wastes in a paramecium.
Answer:
Contractile vacuole
Explanation:
Contractile vacuole pumps out excess water and wastes in a paramecium.
The structure that pumps out excess water and waste in a paramecium is called the contractile vacuole. The contractile vacuole is a specialized organelle that collects excess water and waste materials from the cell and then contracts and pumps them out of the cell through a pore in the cell membrane.
What is water's role?Paramecium is a single-celled organism that belongs to a group of organisms called protists. Like other cells, a paramecium must maintain a proper balance of water and solutes inside its cell to function properly. However, because paramecia live in freshwater environments that have a lower solute concentration than the cell, water tends to move into the cell by osmosis. If too much water enters the cell, it can cause the cell to burst, so the paramecium has developed specialized structures to help regulate the movement of water.
Hence, the structure that pumps out excess water and waste in a paramecium is called the contractile vacuole. The contractile vacuole is a specialized organelle that collects excess water and waste materials from the cell and then contracts and pumps them out of the cell through a pore in the cell membrane.
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what feature of bacteriophages make them useful for genetic engineers
Bacteriophages, also known as phages, have several features that make them useful for genetic engineers. One key feature is their ability to infect and replicate within bacterial cells. This property allows phages to serve as vehicles for transferring foreign DNA into bacterial hosts.
Phages can be engineered to carry specific DNA sequences of interest, such as genes or regulatory elements. These sequences can be inserted into the phage genome, replacing non-essential viral genes. When the engineered phage infects a bacterial cell, it delivers the foreign DNA into the host's genome, where it can be expressed and manipulated.
Phages also possess high specificity for certain bacterial strains or species. This specificity allows genetic engineers to target specific bacteria for DNA delivery or modification. By selecting phages with host range specificity, researchers can tailor their genetic engineering efforts to particular bacterial hosts.
Moreover, phages have the ability to undergo a lytic or lysogenic cycle. In the lytic cycle, phages replicate rapidly within the host, leading to the lysis of the bacterial cell and release of newly formed phage particles. In the lysogenic cycle, phages integrate their DNA into the host genome, becoming a prophage. This property allows the stable incorporation of foreign DNA into bacterial chromosomes, making phages useful for long-term gene expression studies or modification of the host's genetic makeup.
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The group of Anolis sagrei on the experimental island had shorter legs on average than the A. sagrei on Iron Cay. What is a likely explanation for this finding?
Continue
Open the reference graph in a new window
A likely explanation for the finding that the group of Anolis sagrei on the experimental island had shorter legs on average than the A. sagrei on Iron Cay could be natural selection.
The environment on the experimental island may have favored individuals with shorter legs, such as a different type of vegetation or different prey availability, leading to those with shorter legs having a higher survival and reproductive success. Over time, this could lead to a shift in the average leg length of the population.
Alternatively, the population on the experimental island could have been founded by individuals with shorter legs, leading to a genetic difference between the two populations.
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an organism grown in nutrient rich broth to high turbidity always produces a blue pigment. when a large inoculum is transferred to a nutrient rich agar plate, it also appears blue. a researcher noticed that this never happens when very small colonies are grown on low nutrient agar plates, however. what is the most plausible conclusion?
Quorum sensing is connected to the generation of the blue pigment. Here, the organism under examination accumulates molecules that indicate the presence of higher cell density.
The quorum sensing control technique initiates and is totally responsible for this blue pigment production in the bacteria. The pigment bacteria could detect and feel the presence of cells in high densities through a technique called quorum sensing. As a result, the signaling molecules, which are blue pigments, are accumulated and lead to the blue pigmentation. Although quorum sensing is used by both gram-positive and gram-negative bacteria, there are some significant distinctions in the mechanisms involved.
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what type of research design is bryophyte responses to fragmentation in temperate coastal rainforests: a functional group approach
The research design "Bryophyte responses to fragmentation in temperate coastal rainforests: a functional group approach" is a quasi-experimental study.
It employs a fragmented-intact forest comparison design, where researchers compare the responses of bryophyte (mosses and liverworts) functional groups to fragmentation in temperate coastal rainforests. The study uses both fragmented and intact forests as the two treatments, and the bryophyte functional groups as the response variables. The study also uses a before-after control-impact (BACI) design, where the researchers compare the bryophyte functional groups before and after fragmentation.
The functional group approach allows the researchers to generalize the findings to a larger group of species and determine how different functional groups of bryophytes respond to fragmentation. The study can provide valuable insights into the role of bryophytes in temperate coastal rainforest ecosystems and their responses to fragmentation, which can inform conservation and management efforts.
In conclusion, the "Bryophyte responses to fragmentation in temperate coastal rainforests: a functional group approach" research design is a quasi-experimental study that employs a fragmented-intact forest comparison and a before-after control-impact design to determine the responses of bryophyte functional groups to fragmentation.
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Molecularly, a gene is an organized unit of blank______ sequences that can be transcribed into rna.
Molecularly, a gene is an organized unit of DNA sequences that can be transcribed into RNA.
The general laboratory technique of determining a DNA molecule's exact sequence of nucleotides, or bases, the exact sequence of nucleotides, or bases, in a DNA molecule is referred to as DNA sequencing. The bases' sequence (often referred to by the first letters of their chemical names: A, T, C, and G) encrypts the biological material used by cells to develop and function.
Deoxyribonucleic acid (DNA) is a polymer made up of two polynucleotide chains that coil around one another to form a double helix. The polymer contains genetic instructions for all known organisms and viruses' development, functioning, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid.
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3. Annotate the following diagram to show the purpose of different parts
of the leaf.
Upper
Epidermis
Mesophyl
Lower
Epidermis
Sioma
p
Guard Cell with Chioroplasts
a
Wary Cuticle
Palisade
Mesophy
Spongy
Mesophy
-Wary Cuticle
The upper and lower epidermis are protective layers that help to prevent water loss from the leaf. The waxy cuticle is a waterproof layer that covers the leaf and helps to prevent water loss as well.
The palisade mesophyll is a layer of closely packed cells containing many chloroplasts, which is where photosynthesis primarily occurs. The spongy mesophyll is a layer of loosely packed cells that provides additional surface area for gas exchange.
The stomata are small openings on the surface of the leaf that allow for gas exchange, and the guard cells are specialized cells that control the opening and closing of the stomata. The stroma is the fluid-filled space within the chloroplasts, where the Calvin cycle of photosynthesis takes place.
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If you have a cup of water the
same temperature as the
ocean, which has more heat
energy? why
Answer:
the ocean because there are a lot of particles.
Explanation:
I HOPE ITS HELP YOU
What is the purpose of meiosis?
Answer:
Genetic variation by crossing over
Produce 4 daughter cells from single parent cell.
Explanation:
PLEASE HELP I AM NOT GOOD AT SCIENCE
Which of these Earth systems interact when a volcanic eruption produces a large amount of smoke?
geosphere and cryosphere
geosphere and atmosphere
hydrosphere and biosphere
hydrosphere and cryosphere
Answer:
Geosphere and atmoshphere
Explanation:
What are the two main uses of Coal and Oil and Natural Gas fossil fuel:
help me help me help me
Answer:
the 2 main uses of coal and oil are
Explanation:
Answer:
Most of our energy comes from three fossil fuels: Oil, which we use to produce gasoline and other refined liquid fuels (petroleum derivatives). Natural Gas, which can be used in cooking and for heating homes. Coal, which is the main fuel burned in electric power plants.
The figure below shows an experiment on photosynthesis. Rebecca observed that the part of the leaf outside the
bottle showed the presence of starch in it. The part of the leaf inside the bottle did not show the presence of starch.
When the same experiment was repeated without potassium hydroxide (KOH) in the bottle, the whole leaf showed the
presence of starch.
KOL
KOH
Water
What can Rebecca correctly infer about potassium hydroxide?
SC 912. L.18.9
It absorbs carbon dioxide
It releases oxygen
It produces water
It dissolves cells
Answer:A
Explanation:
It absorbs carbon dioxide
Answer: the answer is c: it releases oxygen
Explanation:
i took the test and studied
Which statement best describes the inner
core?
A. It is at the very center of the earth and consists of metal.
B. It is the layer responsible for plate tectonics.
C. It is the molten middle layer.
D. It has two layers, continental and oceanic.
The right matches are:
1. The inner core is matched with F) the solid iron.
The inner core, or seed, is the solid part in the center of the Earth. It is a ball of 1,220 kilometers in radius located in the center of the outer core (liquid). It is composed of an alloy of iron and nickel, as well as lighter elements. The boundary between the outer core and the inner core is called Lehmann's discontinuity, or ICB (for inner core boundary).
2. The outer core is matched with G) very dense liquid of iron and sulfur
The outer core is the liquid part of the Earth's core, an intermediate layer located above the solid seed (inner core) and below the Earth's mantle. Like the seed, the core is a metal alloy, consisting mainly of iron and nickel. The liquid of the outer core is animated by rapid convective movements that induce a dynamo effect at the origin of the Earth's magnetic field.
3. The lower mantle is matched with C) layer just outside of the outer core
The lower mantle is sometimes called the "mesosphere". It extends from 700 to 2900 km deep.
The lower mantle is responsible for a particular phenomenon: hot spots. Hot spots are volcanoes that are not born at the border of two tectonic plates, unlike ordinary volcanoes, but in the middle of these plates. They occur when the god chief and deceased is irregular. The lava from these volcanoes is more gaseous and comes from the depths of the mantle (hence the lower mantle), which allows to deduce the shape of the lava at this level.
4. The upper mantle is matched with B) made of large plates that move
The top of the mantle and the crust form the lithosphere, which can reach 300 km below the continents (since the oceanic crust is much thinner). The part of the lithosphere that is not the crust (hence the top of the upper mantle) is very brittle (which allows it to move). From 200 to 700 km deep, we find the "asthenosphere", which is the plastic part of the upper mantle.
5. The crust layer is matched with D) thin, rigid surface of Earth
The earth's crust is the superficial and solid part of the material from which the Earth is made. This is the upper part of the lithosphere (which constitutes the tectonic plates).
The boundary between the Earth's crust and the upper mantle is the Mohorovicic discontinuity.
The earth's crust exists in two radically different "varieties", the continental crust, of predominantly granitoidal petrological composition, and the oceanic crust of essentially basaltic nature.
6. The lithosphere is matched with E) layer that includes the asthenosphere
The lithosphere is the rigid terrestrial envelope of the Earth's surface. It includes the earth's crust and part of the upper mantle.
It is divided into a number of tectonic plates, also called lithospheric plates.
The lithosphere, relatively rigid on time scales of the order of 1 to 10 Ma, rests on the asthenosphere, solid but ductile, more easily deformable because it consists of rocks under physico-mechanical conditions (pressure, temperature, therefore speed increased deformation), leading to a relatively low viscosity.
7. The asthenosphere is matched with A) platic portion of the upper mantle of the Earth.
The asthenosphere (from the Greek asthenos, without resistance) is the ductile part of the upper terrestrial mantle. It extends from the lithosphere to the lower mantle for 700 kilometers.
This concept emerged in the late 1960s with the plate tectonics revolution and the mesosphere concept. The asthenosphere is between the lithosphere and the mesosphere.
Given the following
mRNA, determine the
original DNA sequence.
UACGUAUCGUUUAGC