The collection of organisms and their nonliving surroundings that functions as a unit is called ecosystem. There are two kinds of ecosystem:
Aquatic ecosystems (ecosystems dependent on water) Terrestrial ecosystems are those found on land.Biomes are broad classifications of terrestrial ecosystems based chiefly on climate. Tropical rain forests, savannas, deserts, coniferous forests, and tundra are a few examples of nonliving surroundings in terrestrial biomes. According to the definition of an aquatic ecosystem, it is a water-based environment. Aquatic environments are of two types: marine ecosystems and freshwater ecosystems. The organisms included different fish species, crayfish, turtles and sharks etc.
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When you weigh ammonia, what fraction of it is hydrogen?Answer Options:A. 3/17B. 3/4​
Hydrogen and nitrogen, which are both nonmetals, are found in ammonia. With the three hydrogens present, nitrogen thus forms three covalent bonds.
Ammonia consists of three hydrogen atoms and one nitrogen atom. Hydrogen nitride is another name for it. Ammonia therefore contains nitrogen and hydrogen in a 14:3 mass ratio. Hydrogen and nitrogen, which are both nonmetals, are found in ammonia. With the three hydrogens present, nitrogen thus forms three covalent bonds.
In ammonia, the bond with a proton (H +) is formed by the lone electron pair on the nitrogen atom (N), which is depicted as a line above the N. After that, each of the four N–H bonds, which are polar covalent bonds, is equivalent. The ion isoelectronic with methane and the borohydride anion and has a tetrahedral structure.
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When I weigh ammonia, fraction of hydrogen is A)3/17.So,correct option is A. Molecular formula of ammonia is NH₃.
For finding the fraction of hydrogen in ammonia, we need to know about the molecular mass of ammonia. By knowing the molecular mass we can easily find the fraction of hydrogen in it.
We know that molecular mass of ammonia is =Molecular mass of Nitrogen + 3 ˣ Molecular mass of Hydrogen. Since, molecular mass of hydrogen is 1 gm and molecular mass of nitrogen is 14g.
So, molecular mass of ammonia is = (3 ˣ 1) + 14
=>molecular mass of ammonia is =17g.
Now,taking about fraction of hydrogen in it=(total mass of hydrogen) / total mass of ammonia
=>Fraction is =3/17
Hence,correct option is A.
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(Complete question) is:
When you weigh ammonia, what fraction of it is hydrogen?Answer Options:A. 3/17 B. 3/4 C)3/5 D)3//14
true or false? Based on the concepts of kinetic molecular theory, if the kinetic energy of atoms goes up, then the temperature will go up.
The statement "based on the concepts of kinetic molecular theory, if the kinetic energy of atoms goes up, then the temperature will go up" is definitely true.
What is the Kinetic molecular theory?The kinetic molecular theory may be stated that the average kinetic energy of a gas particle depends only on the temperature of the gas.
The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else. So, if the kinetic energy of atoms goes up, then the temperature will definitely increase gradually in a closed system.
Therefore, the statement "based on the concepts of kinetic molecular theory, if the kinetic energy of atoms goes up, then the temperature will go up" is definitely true.
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Excessive matting of the hair is referred to as:
Answer:
plica polonica
Explanation:
Pilca polonica. A condition in which beads or nodes form in the hair shaft is called: Monilethrix. A disorder that refers to a chronic scalp condition with excessive flaking, which accumulates on the scalp or falls to the shoulders, is known as dandruff or. Pityriasis.
Why do producers rely on consumers
Which of the following best describes natural selection?AA populations gene frequencies change over time.BIndividuals develop useful adaptations in response to environmental stress.CIndividuals with the most favorable traits survive and reproduce.DSome individuals in a population will survive longer than other members of the population.
Natural selection is said to have occurred when individuals having the most favorable traits survive and reproduce.
Natural selection is a very key mechanism of evolution in which only the organisms or the individuals of a population which have desirable traits or characteristics are naturally selected and survive whereas the ones which do not have any desirable characteristics do not survive. This concept was given by the naturalist Charles Darwin.
The genes which bring about variations in an organism's genotype and give the organism a survival advantage over others are preserved and protected and are passed on to the next generation.
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Look at the diagram. Which of these gives the best account of how the islands were formed?
(A) Magma rises over the hot spot and forms an island. The plate moves, and another island forms.
(B) There are many hot spots along the plate boundaries. Each one forms a single island.
(C) The plate boundaries collide and form many volcanoes along the plate boundaries.
(D) As magma heats up in the mantle, it flows along the lithosphere and forms many islands
An island is formed by magma rising over the hot point. A new island is created as a result of plate movement.
What does the term "magma" mean?Under the surface of the Earth, magma is rock that is partially liquid and extremely hot. Lava is the term used to describe magma that flows onto the Earth's surface.
Magma a sort of rock?The source of igneous rocks is magma, a rock that is molten or partially molten. While melts of carbonate and sulfur do occasionally occur, it mostly consists of silicate liquid. Lava is ejected from magma that has either migrated to great depths or the Earth's surface.
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How would the carbon cycle be disrupted if human activities released an extremely large amount of carbon dioxide into the
atmosphere?
A)Plants would have more difficulty engaging in photosynthesis, and a massive amount would die off.
B)Plants and animals in Earth's oceans would have more difficulty processing carbon dioxide, and carbonification would not occur in
deep marine soils.
C)Animals would have more difficulty breathing, and it would be years before the air contained a healthy amount of oxygen.
D)Humans would have difficulty burning wood and fossil fuels, and it would take years before the air contained a healthy amount of
bicarbonate (HCO3-).
Plants and animals in Earth's oceans would have more difficulty processing carbon dioxide and carbonification would not occur in deep marine soils. The correct option is B
What is carbon cycle?
Carbon cycle can be defined as the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of Earth.
There are four steps of carbon cycle such as :
Carbon enters the atmosphere as CO2CO2 is absorbed by autotrophs such as green plantsAnimals consume plants thereby incorporating carbon into their systemAnimals and plants die their bodies decompose and carbon is reabsorbed back into the atmosphereTherefore, The correct option is B
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Write the equation for photosynthesis.
(hint - there are answers/questions within this assessment that can help you)
2Points
You can write the equation using the chemical formulas or words and do not forget to include the arrow in the middle of your equation.
(Please tell me exactly what you mean/are referring to in your answer as I cannot assume what you are telling me in your answer.)
Answer:
6 CO2 + 6 H2O + light energy ⇒ C6H12O6 + 6 O2
where:
CO2 = Carbon Dioxide
H2O = Water
light energy = energy from light (photons)
C6H12O6 = glucose (a simple sugar)
O2 = Oxygen
Explanation:
PLSS HELP ASAP!!!!!!!
What do dairy shorthorns eat and how they affect milk production?
White, red, and the colour "road," which is a very close combination of red and white, are the coat colours of milking Shorthorns.
What is the purpose of shorthorn milk?These resilient cows have rapid healing times and are healthy enough to reproduce sooner. The best protein-to-fat ratio of all the dairy breeds is found in shorthorn milk, which is advantageous when selling your milk for cheese.
How much milk is produced by a Shorthorn?Shorthorns being milked This breed is English in origin. The Milking Shorthorn is known for being a good milker and has a wide range of adaptability. Each cycle, a typical cow produces 15,400 lbs. (6,990 kg) (or 1880 gallons) of milk with a 3.8% butterfat and a 3.3% total protein content
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This passage describes the coat graying trait in horses:
Your hair may turn gray or white as you grow older. Some horses go through a similar process called coat graying as they age. These horses are usually a darker color, such as brown or black, when they are born. Over time, the hairs of their coats lose their original color and become gray or white.
In a group of horses, some individuals have coat graying and others do not. In this group, the gene for the coat graying trait has two alleles. The allele G is for having a graying coat, and the allele g is for not having a graying coat.
Argo, a horse from this group, does not have coat graying. Argo has two alleles for not having a graying coat.
Based on this information, what is Argo's phenotype for the coat graying trait?
gg
Gg
not having a graying coat
having a graying coat
where is the question
Explanation:
In the tropical rainforest plants must compete for
This plant is Macaranga hypoleuca. Compare its leaves to those of the plants around it. What is the relationship between the leaves of this plant, photosynthesis, and competition with neighboring plants
The three important functions of individual plants that determine the process of canopy development and competition are as follows:
Resource acquisition plasticity.Morphogenetic plasticity.Architectural variation in the efficiency of interception and utilization of light. What is Competition?Competition may be characterized as a type of interaction between organisms or species in which both require a resource that is in limited supply. It lowers the fitness of both organisms involved since the presence of one of the organisms always reduces the number of resources available to the other.
In the tropical rainforest plants must compete for sunlight, nutrients, and other resources. The relationship between the leaves of this plant is that they receive less sunlight due to this, the rate of photosynthesis is typically low. As a result of this, it faces more competition with the neighboring plants.
Therefore, the three important functions of individual plants that determine the process of canopy development and competition are well described above.
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Natural selection is a process by which organisms that are better adapted to their environment tend toA-increase in sizeB-migrateC-evolve new traitsD-survive
Natural selection is a process by which organisms that are better adapted to their environment tend to evolve new traits.
In general ,Natural selection is considered as the process through which organisms develop variation in traits, which make them more fit to survive in changing environment survival. Thus , Natural selection primely depends on the environments. Natural selection doesn't depend on the traits that are genetically superior natural trait but they acts on existing heritable variation . These Heritable variation comes from random mutations.
Hence , we can say that Development of genetically modified organisms is of artificial selection but natural selection come over years of adaptation.
Hence, C is the correct option
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Which table best compares the parent cell to the daughter cells in the process of meiosis?
Meiosis gives rise to four unique daughter cells each of which has half the number of chromosomes as the parent cell.
What is meiosis?
Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes the sex cells or egg and sperm. In humans body or somatic cells are diploid containing two sets of chromosomes one from each parent.
Meiosis has distinct stages called :
prophase MetaphaseAnaphase PelophaseTherefore the purpose of meiosis is to produce gametes or sex cells. During meiosis four daughter cells are produced each of which are haploid containing half as many chromosomes as the parent cell.
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Describe the sex and characteristics of the person labeled a
Answer: Person a is a female with attached earlobes.
Explanation: i dont have an explanation
Among all primates, humans have the:
Among all primates, humans have the largest brain corresponding to the brain size.
In general, characteristic that primates were having are the eyes with Forward projection they also have a protruding fields of view that allow depth perception. Also the eye sockets are having ring and cups surrounded by bones . A unique feature like extruding hands with long fingers to curl around objects.
We can say that Human DNA is almost 95-96% identical to the DNA most distant primate species, and nearly 99% similar to our closest relatives, like chimpanzees . Humans are considered to have significantly larger brain then primates.
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Which of these could be an example of a freshwater wetland?A. SwampB. PondC. ForestD. Lake
Swamp could be an example of a freshwater wetland.
In general , swamps, marshes, and bogs are the three major kinds of wetlands. Swamp is considered as a wetland that is permanently saturated with water and dominated by trees. Example of two main types of swamps are freshwater swamps and saltwater swamps.
Hence, Ponds and lakes are example of both inland bodies of freshwater containing creatures. Wetlands can also be tidal or non-tidal in nature they can either contain freshwater, brackish, or saltwater. Example of different types of freshwater wetlands are marsh, bog, fen, swamp, mire and slough. So , Wetlands considered as shallow lakes not created due to tectonic activities.
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If the input and output of carbon is balanced in the carbon cycle, what can be generalized about the resident times of carbon in organisms?.
Due to the fact that carbon is expelled as soon as it is absorbed, the resident time would be zero.
What is a healthy carbon cycle?The carbon cycle is essential to life on Earth. Because nature tends to keep carbon levels in balance, the amount of carbon that is naturally released from reservoirs equals the amount that is naturally absorbed by reservoirs. By maintaining this carbon balance, the planet can support life indefinitely.
Why is it important for the carbon cycle to remain balanced?The carbon cycle appears to sustain a balance over time that prevents all of the carbon on Earth from either entering the atmosphere (as is the case on Venus) or from being totally stored in rocks. The Earth's temperature is largely maintained by this equilibrium.
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A scientist determines that the following mutation has likely occurred in a fruit fly's DNA to change the shape of the wing.
The scientist claims that using gel electrophoresis will allow them to detect which DNA strand has the mutation and which does not.
Why will this work?
The DNA has different lengths, and gel electrophoresis will separate the strands by length showing the mutated gene is shorter than the original gene.
The strands have the same amount of thymine in them, so this technology cannot be used to compare the two genes.
The strands have the same amount of guanine in them, so this technology cannot be used to compare the two genes.
The DNA has different base pairs, and gel electrophoresis will separate the strands by comparing the base pairs, showing the mutated gene has one less A-T base pair.
According to size, the molecules that enter the gel will separate. Because they do not need to squeeze through the gel's pores as much as the larger ones do, the smaller ones will travel further down the gel.
What is electrophoresis explain?A laboratory procedure called electrophoresis is used to divide DNA, RNA, or protein molecules according to their size and electrical charge. Colloidal particles migrate during electrophoresis under the influence of an applied electric field. In cataphoresis, negatively charged particles move away from the anode while positively charged particles move closer to it (anaphoresis). Colloid particle charges can be determined via electrophoresis.
What is the basic principle of electrophoresis?The phenomenon that most biomolecules exist as electrically charged particles with ionizable functional groups serves as the foundation for electrophoresis. At a specific pH, biomolecules can exist as either positively or negatively charged ions in a solution. The technology of electrophoresis is crucial for the separation and examination of nucleic acids. At the lab bench, cloned DNA fragments are frequently isolated and worked with using nucleic acid electrophoresis.
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A dna mutation changes the shape of the extracellular.a. Trueb. False
Answer:
True
These variants likely alter the shape of the protein, impairing its ability to bind to actin and other proteins
Explanation:
A mutation is a random change to an organism's DNA sequence. • Most mutations have no effect on traits, but some mutations affect the expression of a gene
The molecule that normally binds to protein AA will no longer attach, deactivating the cellular response.
This type of irrigation uses a large system of sprinklers that must be manually moved from field to field and has very large evaporative losses.
answer choices
Drip Irrigation
Flood irrigation
Furrow irrigation
Spray irrigation
Irrigation that uses a large sprinkler system and is moved manually and experiences very large evaporation losses are called drip Irrigation
What is irrigation?Irrigation or watering is an effort made by humans to irrigate agricultural land. In the modern world, there are currently many models of irrigation that can be done by humans.
One of them is drip irrigation. Drip irrigation is a way of giving water to plants directly on the soil surface. This type of irrigation uses a tool called an emitter or dropper and is moved manually. This tool is used to spread water throughout the soil profile, both horizontally and vertically as a result of gravity and capillarity.
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Identify the part of the neuromuscular junction at B:
a. A Axon Terminal
b. Dendrites
c. Axon branches
d. Muscle fiber
Part of the neuromuscular junction at B is the axon terminal. Here option A is the correct answer.
The neuromuscular junction (NMJ) is the site where a motor neuron's axon terminal (part B in the image) makes contact with a muscle fiber (part D in the image).
At the axon terminal, the motor neuron releases a chemical neurotransmitter called acetylcholine (ACh) which diffuses across the synapse and binds to receptors on the muscle fiber, leading to the contraction of the muscle.
Dendrites are the branches of a neuron that receive signals from other neurons, and Axon branches are the branches of the axon that send signals to other neurons or muscle fibers.
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Which of the following ways is most likely to decrease the genetic diversity in a population?AGene mutationBGenetic recombinationCStabilising natural selectionDImmigration of individuals
Answer:So, the correct answer is 'Stabilising natural selection'.
Explanation:
It is an organic compounds serve as the genetic information storage molecules and also provide information to make proteins.
Deoxyribonucleic acid (DNA) is an organic compound that serves as the genetic information storage molecule and provides information to make proteins.
What is DNA?
DNA is an organic compound that stores genetic information and provides information to make proteins.
DNA is an organic molecule (containing carbon) that has a double helix structure. It is formed from two strands that bind together by hydrogen bonds between base portions.
DNA stores genetic information in sequences of four bases of nucleic acid; adenine (A), thymine (T), cytosine (C), and guanine (G). Each base, A, T, C, and G considered as a letter that spells out biological messages in the chemical structure. Organisms differ from one another because they have different nucleotide sequences and cause different messages.
These nucleotide sequences act as the instruction for producing protein. Therefore DNA messages encode the protein.
For example, the nucleotide sequence of the beta-globin gene. This gene carries the information for the amino acid sequence of the hemoglobin molecule.
Thus, structurally DNA is an organic compound that stores information in the form of nucleotide sequences, for making proteins.
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How do geologists study direct evidence of Earth’s interior?
Answer: Geologist study direct evidence by using Machines called, Magda lights, they see underneath the earths surface.
Pls help! Could you also explain how you got your answer? Thank you!
The hospital must have made a mistake as the child can not have a blonde hair.
What are the genotypes?
We know that when we talk about the genotypes we mean the sum total of the genes that the individual can be able to get from its parents. Let it be noted that the father can said to have the genotype Rr while the mother has the gene RR. The phenotype is the expressed trait that we see.
The R here is the gene for the brown hair. In each of the cases, we cam see that the crossing of the genes must always give rise to a child that has a brown hair thus the hospital must have made a mistake.
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All capillary beds are continuously perfused with blood.
True of False
Answer: False
Explanation: During exercise the capillary beds in the muscles are perfused with blood, while capillary beds around the GI tract are closed off to allow for sufficient blood flow to the muscles.
The first stage /step is dna replicationis called ___ because dna Helicase unzips the hydrogen bonds of the nitrogen base pairs
The first stage /step in DNA replication is called Replication Fork Formation because DNA Helicase unzips the hydrogen bonds of the nitrogen base pair, a process where the DNA is “unzipped” into two single strands.
What is the specific role of the DNA Helicase during DNA replication fork formation?The specific role of the DNA Helicase is an enzyme that acts during DNA replication fork formation in order to unzip both strands in the double helix during this process.
Therefore, with this data, we can see that the DNA Helicase plays a fundamental role in DNA replication fork formation by unzipping both strands.
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What kind of process is the phosphorus cycle?
The phosphorus cycle is a kind of biogeochemical process.
The phosphorus cycle is a kind of biogeochemical process in which phosphorus moves through the environment, including the biosphere, hydrosphere, and geosphere. The process is driven by both natural and human factors, and it is closely connected to other biogeochemical cycles such as the carbon and water cycles.
In the natural process, Phosphorus enters the ecosystem through weathering of rocks and minerals, and it is taken up by plants through the roots. Then, the phosphorus is passed along the food chain from plants to herbivores to carnivores. Once the organisms die, the phosphorus is returned to the soil through decomposition by microorganisms, and the cycle continues. Human activities such as agriculture and mining can also affect the phosphorus cycle by releasing or removing large amounts of phosphorus from the ecosystem.
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How was DNA first discovered?
DNA was first discovered in 1869 by Swiss researcher Friedrich Miescher.
Friedrich Miescher initially sought to study the composition of lymphoid cells (white blood cells). Instead, he isolated new molecules called nucleins (DNA containing associated proteins) from the cell nucleus. Miescher was the first to define DNA as a distinct molecule, but several other researchers and scientists have contributed to the relative understanding of DNA as we know it today. And it wasn't until the early 1940s that the study and understanding of DNA's role in heredity began. further, it was found that DNA has a double helix structure.
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What is the waste product of anaerobic exercise?
The waste product of anaerobic exercise is lactic acid.
During anaerobic exercise, such as weightlifting or sprinting, the body's demand for energy exceeds the oxygen supply to the muscles. The body then turns to anaerobic metabolism, which generates energy through the breakdown of glucose without the use of oxygen. This process produces lactic acid as a byproduct.
Lactic acid is also known as lactate and it causes the burning sensation in muscles during high-intensity exercise, when the accumulation of lactate exceeds the body's ability to remove it. The accumulation of lactic acid can also cause muscle fatigue, which is why anaerobic activities are typically of shorter duration than aerobic activities.
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