There is proof that an asteroid strike was the main culprit. Large-scale volcanic eruptions have changed the climate as well as dramatic changes to it that happened over millions of years.
After the asteroid, why long did dinosaurs survive?In 9 months, the darkness brought on by the dinosaur-killing asteroid ended all life on Earth. Plants and animals perished as the sunlight faded. Dark days — literally — followed the asteroid catastrophe that wiped off non-avian dinosaurs.
Which three hypotheses explain the demise of dinosaurs?Following one of the biggest mass extinctions in the history of our planet, caused by a devastating asteroid impact, extensive volcanic activity, climate change, and other factors, most dinosaur lineages vanished by roughly 66 million years ago, according to paleontologists.
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HOMEWORK! What do these mean?
Using both articles "Using Forests Wisely" and "Community Conservation" answer the following questions.
Summarize the scientific information that leads to conservation in each of the articles.
What social issues affected the problem or its solution in each of the stories?
How did economics delay scientists' first attempts at conservation in each story?
Describe the political actions that led to successful conservation in both stories.
"Using Forests Wisely" describes the importance of managing forests sustainably in order to preserve their ecological and economic benefits.
The article highlights scientific research on the role of forests in regulating water cycles, preventing soil erosion, and providing habitat for biodiversity. It also discusses the economic benefits of sustainable forestry, such as long-term timber yields and carbon sequestration.
How to explain the article?"Community Conservation" discusses the importance of involving local communities in conservation efforts in order to ensure their success. The article highlights scientific research on the effectiveness of community-based conservation in protecting biodiversity and preserving traditional knowledge and culture.
In both articles, social issues such as poverty and lack of education can affect the problem and its solution by making it difficult for local communities to participate in conservation efforts. Additionally, in "Using Forests Wisely" the article states that illegal logging and land clearance for agriculture are major drivers of deforestation, which undermines conservation efforts.
Economics also played a role in delaying scientists' first attempts at conservation in both stories. In "Using Forests Wisely", the article states that short-term economic incentives such as clear-cutting for timber often conflicted with the long-term benefits of sustainable forestry. In "Community Conservation" the article states that lack of funding and resources can make it difficult for community conservation groups to implement their plans.
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An enveloped virus is dependent on the envelope for its ability to infect a host cell. Which virus most likely uses this mechanism?
HIV
polio
rabies
Ebola
Answer:
rabies yeah I think rabies
Answer:
The answer is HIV also known as A
Explanation:
Good try though
Read the scenario below and answer the questions that follow for 2 points each: Two Siamese and three Persian cats survive a shipwreck and are carried on driftwood to a previously uninhabited tropical island. All five cats have normal ears, but one carries the recessive allele f or folded ears, his genotype is Ff. The other four cats are not carriers, so their genotype is FF. Thus there are 10 total alleles within this population, 9 being F alleles and 1 being f. So, the frequencies are 9/10 or 0.90 for F the allele and 1/10 or 0.10 for the f allele. 1. Identify ONE of the five conditions required for Hardy-Weinberg equilibrium that this population of cats does not meet. 2. If you assume Hardy-Weinberg equilibrium for this population, what would be the frequencies of the two alleles after 10 generations? 3. Knowing that the frequency of the folded ears genotype ff is equal to to the frequency of the f allele squared (0.1 x 0.1), how many cats would have folded ears if after 10 generations there are 2,500 cats on the island?
Answer:
c
Explanation:
According to H-W, a population is in equilibrium if it meets five conditions, and have the same allelic and genotypic frequencies through many generations. 1) Infinite population size / 2) p=0.9 and q=0.1 / 3) 25 cats
-------------------------------------------------------
Let us review some theoretical framework about Hardy-Weinberg equilibrium, while we answer the questions.
⇒ Hardy-Weinberg assumption for a population in equilibrium:
Random matings No superposed generations No mutations No migration Infinite population size ⇒ No genetic drift No natural selectionQ1. Identify ONE of the five conditions required for Hardy-Weinberg equilibrium that this population of cats does not meet.
Since this population is composed of two Siamese and three Persian cats, the condition that this population does not meet is infinite population size.
This population is under the effect of genetic drift for being only 5 individuals colonizing an island.
*****************
⇒ According to Hardy-Weinberg, p and q represent the allelic frequencies in a locus, referring to the allelic dominant or recessive forms.
The genotypic frequencies after one generation are p² (H0m0zyg0us dominant), 2pq (Heter0zyg0us), q² (H0m0zyg0us recessive).
Populations in H-W equilibrium will get the same allelic frequencies generation after generation.
The sum of these allelic frequencies equals 1, this is p + q = 1. The genotypic frequencies sum also equals 1, this is p² + 2pq + q² = 1.
Being
p the dominant allelic frequency, q the recessive allelic frequency, p² the h0m0zyg0us dominant genotypic frequency q² the h0m0zyg0us recessive genotypic frequency 2pq the heter0zyg0us genotypic frequencyQ2. If you assume Hardy-Weinberg equilibrium for this population, what would be the frequencies of the two alleles after 10 generations?
Allelic frequencies, f(x), are
f(F) = p = 0.9f(f) = q = 0.1If this population is in H-W equilibrium, the allelic frequency will be the same through many generations.
So, after 10 generations, the allelic frequencies will still be p = 0.9 and q = 0.1.
Q3. Knowing that the frequency of the folded ears genotype ff is equal to to the frequency of the f allele squared (0.1 x 0.1), how many cats would have folded ears if after 10 generations there are 2,500 cats on the island?
We know that,
f(F) = p = 0.9f(f) = q = 0.1N = 2500 catsTo get the number of individuals with folded phenotype, we should get the phenotypic frequency, which equals the genotypic frequency because it is the recessive phenotype.
Genotypic and Phenotypic Frequency
F(ff) = q² = 0.1 = 0.01Now that we have the phenotypic frequency, we just need to multiply it by the total number of individuals in the population, N.
N = 2500 individuals
Individuals with folded ears = 0.01 x 2500 = 25So, after 10 generations and a population size of 2500 cats, there will be 25 folded-eared individuals.
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Which of the following is correct about the polyadenylation mechanism?
Answer:
a long chain of adenine nucleotides is added to the 3' end of mRNA during termination of transcription
Explanation:
During cell growth, the volume of the cell increases at a faster rate than the surface area.
A
True
B
False
Answer:
True!
Explanation:
Hope this helps!
Answer:
True
Explanation:
Chest and shoulder muscles that move the arm at the shoulder joint have insertions on the.
Answer:
Humerus
Explanation:
Migration, hibernation, and dormancy are all methods of
A. producing food
B. changing the environment
C. adapting to changes in the environment
D. producing energy
Migration, hibernation, and dormancy are all methods of adapting to changes in the environment. The correct option is C.
What is migration?Migration is the process of moving to a different place when the place you are living is not suitable for your living. Most animals migrate to different places when the temperature or food conditions are not good. It is of two types, partial, or full migration.
Hibernation is a process of slowing down the physical and biological processes and going to a place and sleeping for a long time. It is a partial process. In winter, most animals undergo hibernation.
Dormancy is also like hibernation, in this process animals slow down their physical activities. It is a partial process.
Therefore, the correct option is C. adapting to changes in the environment.
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What are the three domains of life?plantae, animalia, and fungiclass, kingdom, and phylumeubacteria, family, and eukaryabacteria, archaea, and eukarya.
The Archaea, Bacteria, and Eukarya are considered as the three domains of life. Organisms with prokaryotic cells fall under the domains of Archaea or Bacteria and are called prokaryotes, while those with eukaryotic cells fall under the category Eukarya.
A single-celled or individual celled organism which is known as a prokaryote is devoid of the nucleus, another membrane-bound organelle. Prokaryotes were categorized under the empire Prokaryota in Édouard Chatton's two-empire theory. Prokaryotes are divided into two domains by the three-domain method based on molecular analysis: bacteria (formerly Eubacteria) and archaea (formerly Archaebacteria). The third domain, eukaryota, is designated for creatures with nuclei. It is thought that prokaryotes predated eukaryotes in terms of biological evolution.
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Discuss how biology and environment play a role in the development of a fetus. Which do you think has the most lasting impact on the development of a fetus: biology or environment?
Embryonic development is a complex process that is defined by many factors. But in general, we can say that it is affected by 2 important sources of change: genes and the environment. Genes hold the necessary information that will dictate how the embryo will develop and the characteristics it will have. However, the environment will define which genes will be expressed and carry out their function and which genes will be "dormant or silenced" and have no effect on the development of the embryo. Therefore, both are equally important, since on the one hand, if the genes did not exist, the embryo would not have the necessary information to develop. Meanwhile, on the other hand, if the cells did not respond to the inhibitory stimuli of the environment, for example, they would multiply unceasingly leading to the malformation or death of the embryo.
describe how competition, predation and
symbiosis influence the population size of the organisms concerned.
Answer:
Interactions among organisms in an environment include predation, competition, and symbiosis. It's conceivable that the population sizes of species that benefit from such an association will grow. Similarly, if a contact is harmful to an organism, the population size of that creature is likely to decline.
When a predator hunts for another organism, it is called predation. The prey is the organism that is hunted. Predators will have more food if the number of prey grows. Predators will have a larger population as a result of this. More prey will be consumed when there are more predators. As a result, the prey population will shrink. As a result, a predator-prey population cycle emerges.
In a given habitat, competition occurs when two organisms or species compete for the same limited resource. Light, food, and shelter are examples of limited resources. The population size of the species receiving less of the resource is likely to shrink. Similarly, the population size of the species receiving more of the resource is expected to grow.
A symbiotic relationship is a close relationship between at least two species that. At least one species involved in a symbiotic relationship benefits. The other member(s) involved in the relationship is/are either helped, harmed, or not affected. Mutualism is a symbiotic relationship that benefits all species involved in the relationship. Therefore, the population sizes of the members involved in a mutualistic relationship are likely to increase. Commensalism is a type of symbiotic relationship in which one member benefits and the other member is neither helped nor harmed. The population size of the species that is helped within such relationship will increase. The population size of the species that aren't harmed won't alter. A parasite and its host form a third sort of symbiotic connection known as parasitism. The parasite gains from the relationship, but the host suffers as a result of it. As a result, parasite population sizes are likely to grow. Similarly, the size of the host population is likely to shrink.
Paheli accidently placed her hand over a flame and immediately pulled it back . She felt the sensation of heat and reacted due to the action of?
PLZ ANSWER QUICK!!!
withdrawal relfex
Explanation:
The withdrawal reflex (nociceptive or flexor withdrawal reflex) is a spinal reflex that aimed to protect the body, stimulated by the presence of damaging stimuli such as heat.
When a person touches a hot object, the heat stimulates temperature and danger receptors in the skin, triggering a sensory impulse that travels to the central nervous system. The sensory neuron then synapses with interneurons that connect to motor neurons. Some of these send motor impulses to the flexors to allow withdrawal.
Describe the type of movement as either facilitated diffusion, osmosis, or diffusion.
Answer:
1. Diffusion
2. Osmosis
3. Diffusion
4. Facilitated Diffusion
5. Osmosis
6. Diffusion
Explanation:
Facilitated Diffusion- Move molecules across the cell membrane in a passive transportation with membrane protein.
Osmosis- Move water molecules from high concentration to low concentration.
Diffusion- Evenly spread molecules from high concentration to low concentration.
1. Gases move across the room with ease without energy.
2. Water enter skin cells allowing cells to grow and wrinkle without energy.
3. Gases move with ease without energy.
4. Glucose requires energy to transfer.
5. Water leaves throat when concentration outside of throat is less that that inside the trough so water moves outwards.
6. Oxygen is uses passive diffusion does not require energy and will with ease move in and through a cell.
This very important component of the heart's conduction system is located in the posterior wall of the right atrium, near the entrance of the superior vena cava:
The sinoatrial node is very important component of the heart's conduction system that situated close to the site of superior vena cava connection on the posterior wall of the right atrium (SA node). The SA node, which is made up of autorhythmic cells, acts as the heart's "pacemaker" by producing the action potentials that cause contraction to begin.
What is sinoatrial node or important component of the heart's conduction system?The SA node, which is made up of autorhythmic cells, acts as the heart's "pacemaker" by producing the action potentials that cause contraction to begin. Bachman's bundle, a unique band of swiftly conducting tissue that quickly transmits the action potential to the left atrium, is hypothesised to help the two atria contract concurrently.
The atrioventricular node (AV node), which is situated in the right atrium's floor close to the interatrial septum, senses the action potential. The internodal pathways are once again specialised conduction routes that swiftly transfer the action potentials from the SA node to the AV node. The action potential is then "delayed" by the AV node for around 0.15 seconds, enabling the atria to contract before the ventricles.
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What is the nucleus of a cell made up of??
Answer:
it made up of genetic materials and the cell found in it is called eukaryotic cells
Explanation:
I would have answered first but I was thinking hope it helps
The cell nucleus of eukaryotic cells contains all the genetic material of the organism, mainly DNA and RNA molecules .
What are characteristic features of eukaryotic nucleus ?The cell nucleus is a small spheroid or oval structure present in the central part eukaryotic cells, other wise called as the operational center as it control all cellular activities.
Largest organelle of eukaryotic cell where its shape can be circular or ovoid.
Along with center part, nucleus can also seen in periphery part of the cell.
It has different components like nuclear envelope or membrane, chromatin, nuclear pore, nucleolus and nuclear sap.
It helps in generation site of ribosome in nucleolus.
The nucleus involve in exchange of hereditary molecules in chromatin that is RNA and DNA between the nucleus and the rest of the cell.
It also help in transportation of regulatory factors and energy molecules selectively.
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A cell has a higher potassium concentration inside than outside. At the Nernst equilibrium, which is true for the ion flow through the selectively permeable membrane? (A) Diffusive outflow equals electric inflow (B) Electric outflow equals diffusive inflow (C) Electric inflow equals electric outflow and diffusive inflow equals diffusive outflow (D) There is a net outflow
At the Nernst equilibrium, the ion flow through the selectively permeable membrane can be described by the following statement: (C) Electric inflow equals electric outflow, and diffusive inflow equals diffusive outflow.
The Nernst equilibrium refers to the point at which the electrochemical gradient for an ion is balanced, resulting in no net movement of that ion across the membrane. For potassium (K+) in this scenario, the Nernst equilibrium occurs when the electrical potential across the membrane (due to the concentration gradient of K+ and the membrane potential) exactly opposes the tendency for K+ to diffuse down its concentration gradient.
At the Nernst equilibrium, the electrical forces pushing K+ out of the cell are balanced by the diffusive forces pulling K+ into the cell. Consequently, the electric inflow of K+ equals the electric outflow of K+, and the diffusive inflow of K+ equals the diffusive outflow of K+.
Therefore, option (C) is the correct answer.
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Which of the following was a major goal of the framers of the Constitution as stated in the Preamble?
Select one:
A.
expand the United States to the Pacific Ocean
B.
secure the blessings of liberty to ourselves and our posterity
C.
bind together the states less closely
D.
establish independence from Great Britain
Answer:
secure the blessings of liberty to ourselves and our posterity
hope this helps (:
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1. Explain how ecosystems could be impacted from each indicator of climate change
A.) the rising atmospheric temps tires have contributed to warning of the ocean e increased carbon dioxide in the atmosphere also gets absorbed into oceans increasing its acidity
Answer:
The best indicator of ecological changes, as far as an aquatic ecosystem is considered is the primary producers - Phytoplanktons. The changes with them directly and indirectly affect that ecosystem as a whole.
Explanation:
dna polymerase iii catalyzes the addition of nucleotides to existing rna or dna strands. true or false
The statement is true as DNA polymerase III catalyzes the addition of nucleotides to existing DNA or RNA template strands.
DNA replication, also known as DNA synthesis, involves the enzyme DNA polymerase.
The complementary base pairing rule, which states that adenine binds to thymine and cytosine binds to guanine, is used by the DNA polymerase enzyme to catalyze the addition of nucleotides from the parental DNA strand (template strand) to the complementary strand. Utilizing the ATP-provided energy, the enzyme forms the strand in the 5' to 3' direction by binding the new nucleotide at the 3' OH group.
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the major way that meiosis ii differs from mitosis is that
Meiosis and mitosis are forms of cell divisions that occurs in cells in eukaryotes. This forms of division enables growth and development.
The major way meiosis ii differ from mitosis is that in meiosis II, the daughter cells formed are haploid cells.
Mitosis is also termed as an equational division meaning that the end result yields the same number as the beginning, there is no reduction and resulting cells are still diploid.
In meiosis, there is the reduction in half first in meiosis I then the homologous chromosomes separates at the centromeres in meiosis II resulting in haploid cells.
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Chromosomes that are similar in length, gene content and loci, and centromere position are said to be?
Homologous chromosomes is chromosomes that are similar in length, gene content and loci, and centromere position .
In general , the Homologous chromosomes are the one those are chromosome pairs with approximately same length, centromere position, even the staining pattern that is present for genes occurs at same corresponding loci.
Also these Chromosomes are built with the chromosomal pairs that have same length and centromere positions for the genes corresponding to the same loci. In these chromosomes one of the chromosomes is derived from the father and the other from the mother they also contain the same genes. Hence , these chromosomes in a pair is known as homologous chromosomes.
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The animal that says cocorico in france, quiquiriqui in spain, and chicchirichi in italy, says what in america? oink oink.
In America, the animal that is commonly associated with the sound "oink oink" is the pig.
Why does the pig say oink oink?Pigs are frequently associated with the sound "oink oink" in a wide variety of languages and cultures. Onomatopoeia, which is the creation of words that copy or suggest the natural sound connected with an object or action, is mostly to blame for the fact that pigs are frequently represented by this sound.
Pigs can make a variety of vocalizations, such as grunts, squeals, and snorts. Pigs sometimes grunt when they are conversing with one another or exhibiting particular behaviors, and the sound "oink oink" is a close imitation of this sound.
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Which of the following consists of an amino group, a carboxyl group, and a
side chain?
A. DNA
B. An amino acid
C. A nucleotide
D. A carbohydrate
Answer:
An amino acid
Explanation:
Put the following items in order from largest to smallest. Earth, the Milky Way, the Moon, the Sun and an asteroid
Answer:
From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.
place the statements to their correct category to distinguish between the various types of hepatitis virus infection.
The placement of the statements to their correct category to distinguish between the various types of hepatitis virus infection:
1. Transmission through blood contact, body fluids, sexual activity; also vertical transmission: Hepatitis B
2. Outbreaks linked to unhygienic food handling, eating shellfish, or traveling to developing countries: Hepatitis A or E.
3. Treatment is with direct-acting antivirals which cure in majority of cases: Hepatitis A or E.
4. The incubation period is 10-15 weeks; can lead to chronic infections and cirrhosis or liver cancer: Hepatitis B, Hepatitis C.
5. Generally asymptomatic in acute stage but in many cases infection becomes chronic: Hepatitis B
6. Fecal-oral transmission or vehicle transmission: Hepatitis A or E.
7. Caused by non-oncogenic RNA viruses exhibiting low virulence: Hepatitis A or E.
8. Treatment involves interferon and sometimes RT inhibitors; recombinant vaccine available: Hepatitis B, Hepatitis C.
9. Transmission through blood contact, although mechanism of exposure not always obvious Hepatitis B.
Hepatitis is defined as inflammation of the liver that can result from a variety of causes such as heavy alcohol use, autoimmune, drugs, or toxins. However, the most frequent cause of hepatitis is due to a viral infection which is referred to as viral hepatitis. In the United States, the most common types of viral hepatitis are Hepatitis A, Hepatitis B, and Hepatitis C. The other types of viral hepatitis are hepatitis D and E which are less frequently encountered.
Your question is incomplete, but most probably your full question can be seen in the Attachment.
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Which of the following statements about the cell cycle is FALSE? Once a cell decides to enter the cell cycle, the time from start to finish is the same in for all eukaryotic cell types. An unfavorable external environment can cause cells to arrest in G1. The p53 check point pathway can be activated in G1, Sor G2 phases of the cell cycle O Mitogens stimulate cell division by releasing the molecular brakes that keep cells in the GO or G1 phase of the cell cycle
The FALSE statement among the given options is: "Once a cell decides to enter the cell cycle, the time from start to finish is the same for all eukaryotic cell types."
In reality, the duration of the cell cycle varies among different eukaryotic cell types due to factors such as cell size, function, and specific cell requirements.
An unfavorable external environment can indeed cause cells to arrest in G1, allowing cells to respond to unfavorable conditions and prevent damaged or stressed cells from undergoing division.
The p53 checkpoint pathway, a crucial component in maintaining genome integrity, can be activated in G1, S, or G2 phases of the cell cycle. Activation of this pathway can lead to cell cycle arrest, allowing cells to repair DNA damage or, in cases of severe damage, undergo apoptosis (programmed cell death).
Lastly, mitogens stimulate cell division by releasing the molecular brakes that keep cells in the G0 or G1 phase of the cell cycle. These growth factors help regulate cell proliferation and drive cells to progress through the cell cycle, ensuring proper cell growth and division.
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yo i need the correct answer please i’ll give u a brainliest
Answer:
c. 1 carbon, 4 hydrogen, and 2 oxygen
Explanation:
Which factors are related to the increased occurrence of dizygotic twins?
Select all that apply.
a. Genetics
b. Ethnicity
c. Infertility treatment
d. Random occurrence
d. Timing of conception
The factors that are related to the increased occurrence of dizygotic twins are genetics, ethnicity, and infertility treatment.
These factors can all play a role in the likelihood of a woman giving birth to dizygotic twins. Genetics can influence the likelihood of a woman releasing multiple eggs during ovulation, which can lead to the conception of dizygotic twins. Ethnicity also plays a role, as certain ethnic groups have a higher incidence of dizygotic twins. Finally, infertility treatments, such as the use of fertility drugs or in vitro fertilization, can increase the chances of multiple eggs being fertilized and resulting in dizygotic twins.
So, the correct answer is A, B, and C.
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How might the body treat viruses?
Explanation:
For most viral infections, treatments can only help with symptoms while you wait for your immune system to fight off the virus. Antibiotics do not work for viral infections. There are antiviral medicines to treat some viral infections. Vaccines can help prevent you from getting many viral diseases.
processes form mountains due to deformation at a plate boundary. A.Taphogenic B.Omogenic C.Epirogenic D.Viscolatatid
The correct answer for the given question is option B) Omogenic.Processes form mountains due to deformation at a plate boundary. Omogenic is the process that describes mountain-building activities that occur due to the internal dynamics of the Earth's crust.
The term omogenic refers to processes within the earth's crust that lead to the uplift and building of mountain ranges. These processes are a result of the crust's interior forces. Crustal uplift, folding, and faulting are examples of omogenic processes. Earthquakes and volcanoes can also be created by these forces. Omogenic mountain-building occurs mainly along plate boundaries, where the friction and movement of tectonic plates cause the crust to buckle and fold, resulting in mountain building. Therefore, Omogenic is the process of the formation of mountains due to deformation at a plate boundary.Let's discuss other given options:Taphogenic: This term is used to describe a geological process that results in the burial of rock and sediment.Omogenic: It refers to processes within the earth's crust that lead to the uplift and building of mountain ranges.Epirogenic: It refers to the slow upward and downward movements of the earth's crust, resulting in the formation of continents and ocean basins.Viscolatitudinal: It refers to the deformation of the earth's crust in response to the weight of overlying ice sheets.
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