Answer: D
Explanation: took the usatestprep quiz
There are three domains of life-based, in which organisms can be classified on the basis of differences in the sequences of nucleotides in the cell's ribosomal RNA.
What is ribosomal RNA (rRNA)?Ribosomal RNA is a type of noncoding RNA that is present in all living organisms, it is a site of synthesis of protein.
During protein synthesis, the ribosome acts as a catalytic enzyme for the synthesis of the polypeptide chains. To observe variation in rRNA sequences, it is possible to differentiate organisms on just about the species level and trace evolutionary relationships.
These variations suggest that all cells originate from a common ancestor cell called the last universal common ancestor or LUCA.
Therefore, three domains of life are classified on the basis of differences in the rRNA sequence.
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Which is true about atoms?
A. They are extremely large.
B. They can be broken down
C. They are extremely small.
D. They are only in solids.
Answer: I would say its C.
Explanation: An atom is the smallest unit of matter that retains all of the chemical properties of ... Some elements follow the English term for the element, such as C for carbon and ... Gold atoms cannot be broken down into anything smaller while still retaining ... only about 1/1800 of an atomic mass unit, so they do not contribute much to ...
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What is homeostasis? (
A.the maintenance of a relatively stable internal environment
B.the release of signals that cause body cells to increase their activity
C.a type of body temperature regulation that depends on the external environment
D. a process in which the response to a stimulus causes a reaction that opposes the original stimulus
Homeostasis is the maintenance of a relatively stable internal environment in organisms. It works through a series of feedback mechanisms to counteract changes and bring the internal environment back to its optimal state. This process is described by option D.
Explanation:Homeostasis is the maintenance of a relatively stable internal environment in organisms. It is a vital process that allows organisms to function properly, despite changes in the external environment. For example, when an organism gets too hot, homeostasis regulates body temperature by causing sweat to be released, which cools the body. Conversely, when an organism gets too cold, homeostasis triggers shivering to generate heat.
Homeostasis works through a series of feedback mechanisms. When a change in the internal environment is detected, a signal is sent to a control center, usually the brain. The control center then initiates a response through effectors, such as muscles or glands, to counteract the change and bring the internal environment back to its optimal state.
This process is described by option D, as the response to a stimulus causes a reaction that opposes the original stimulus. Option A also describes homeostasis accurately as the maintenance of a relatively stable internal environment. Option C, body temperature regulation depending on the external environment, is not an accurate definition of homeostasis as it focuses on one aspect of the process.
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Which of the following is a confirmatory test used to reveal the presence of blood with high accuracy?
Kastle-Meyer test
ABAcard HemaTrace test
Hemoglobin test
Anti-sera test
Answer:
The answer is Kastle-Meyer test..
The Direct Coombs' test is a confirmatory test used to reveal the presence of blood with high accuracy. It identifies specific antibodies bound to red blood cells using hemagglutination, a process also employed in cross-match tests prior to blood transfusions.
Explanation:The answer to the question, 'Which of the following is a confirmatory test used to reveal the presence of blood with high accuracy?' is the Direct Coombs' test. This test uses a special reagent known as Coombs' reagent to cross-link antibodies bound to red blood cells, facilitating hemagglutination. Hemagglutination is the clumping together of red blood cells - a process that will occur if a person has antibodies against certain substances.
Another type of test which makes use of hemagglutination is the cross-match test, carried out prior to blood transfusion. It entails mixing a small part of the donor's red blood cells with serum from the patient who is to receive the transfusion. If the recipient has antibodies against the donor red blood cells, hemagglutination will occur.
These tests help to ensure the compatibility of blood for transfusions and can be used to detect specific antibodies in a person's blood, thereby revealing the presence and quantity of certain bacteria or viruses. Therefore, they serve as important tools in medicine for accurate diagnosis and successful blood transfusions.
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Without the process of transpiration, what might happen to a plant?
It might turn orange.
It would grow more slowly.
It would have fewer leaves.
It might burst.
Answer:
Without the process of transpiration, plant might turn orange. It is because of wilting occur in plants. Transpiration is very important for plants growth and survival. Transpiration helps in the uptake of water from the soil. This water is used in the process of photosynthesis. Without this water, the plant wilts due to the removal of water from plant body and plant die. So transpiration is very important for plants.
♡ The Question ♡
-Without the process of transpiration, what might happen to a plant?
* ୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Answer ♡
-It might burst.
*୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Explanation/Step-By-Step ♡
-Due to excess water, the plant might burst.
*୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ Tips ♡
-No Tips provided!
The image below shows a weather service map. A weather service map. Lines are connecting points of equal air pressure. Lines are connecting points of equal air temperature. High and low pressure systems, and warm and cold fronts are marked. Which details best describe this map? Select three options. shows isobars shows isolines shows types of precipitation was created for newspapers was probably used by meteorologists
Answer:
A B E
Explanation:
took quiz ed2020
Answer:
A B E
Explanation:
Trust me on this, also can I have brainiest please?
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force which we witnessed after a sock and balloon were rubbed together.
Electrostatic Attraction
Explanation:
The force generated due to rubbing of balloon and sock is Electrostatic attraction force.In this type of force charges gets transferred from sock to Balloon.Due to this transfer of charges, Force is generated and it causes attraction of balloon and sock for a fraction of time.Hence, from the above discussion we can conclude that force of attraction exists between balloon and socks11) Which taxonomic group has the most species? Please answer ASAP
Answer: Kingdom
Explanation:
The linnaean system of classification used in taxonomy start from highest (most general category) to the lowest level as follows: Kingdom --> phylum/division --> class --> order --> family --> genus --> species.
Thus, since the first level (Kingdom) require species to have the least number of common features, the most species are found in it.
For instance: living organisms of all species are classed into just 5 kingdoms whereas over a billion species exist.
This graph shows three types of species based on the different patterns of survivorship.
Which survivorship strategy is used by the type I species?
Answer:
having high death rates
Explanation:
Answer: having few offspring
What process results in the production of new somatic cells during periods of growth or repair
Answer:
Cell division
1. When the temperatures of materials that are in contact are
the same, the materials are said to be in thermal convection,
to without passing
Answer:
themometer
Explanation:
Final answer:
Thermal contact occurs when two objects are close enough to permit heat transfer. Conduction is the transfer of heat through a material without the material itself moving. This continues until thermal equilibrium is reached, where no heat flows between the objects in contact.
Explanation:
When talking about materials in contact and their temperatures, we refer to the concept of thermal contact. This occurs when two objects are in such close proximity that heat transfer can occur between them. An important principle related to thermal contact is thermal equilibrium, which is the condition where objects in thermal contact no longer exchange heat, as they have reached the same temperature.
Heat transfer can take place in different ways, one of which is conduction. Conduction is the transfer of heat through a stationary material, without the movement of the material itself. The material through which heat is being transferred is known as a thermal conductor. Heat will naturally flow from the hotter object to the cooler one until thermal equilibrium is reached.
An example of conduction is when heat is transferred from the electric burner of a stove to the bottom of a pan despite there being no movement of the material of the pan; the motion of atoms and molecules at the microscopic level facilitates this heat transfer.
What are the two steps of protein synthesis?
Answer: transcription and translation
Explanation:
Look it up?
Answer:
Transcription and translation
Transcription transfers genetic instructions from DNA to mRNA in the nucleus.
What happens after an atom stores energy from passing electrons?
Answer: the electrons lose some or all of the excess energy by emitting light.
Explanation: These levels are called energy states. ... When an electron in an atom has absorbed energy it is said to be in an excited state. An excited atom is unstable and tends to rearrange itself to return to its lowest energy state. When this happens, the electrons lose some or all of the excess energy by emitting light.
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Answer: the electrons lose some or all of the excess energy by emitting light.
Explanation: When an electron is hit by a photon of light, it absorbs the quanta of energy the ... Electrons therefore have to jump around within the atom as they either gain or lose ... When electricity is passed through the diode it glows with a characteristic color telling you that the device is working, switched on and ready to do it's work.
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Match the following terms and definitions.
1. short-term hormonal influences on animal behavior usually occurring late in life
habituation
2. a technique that associates a natural response to a stimulus to an unrelated stimulus; also called Pavlovian conditioning
classical conditioning
3. the study of animal behavior in its natural environment
activational effects
4. when an animal learns not to respond to a stimulus
insightful learning
5. finding a solution to a once unsolvable problem
ethology
6. learning that has taken place but is dormant until a situation requires it
latent learning
1. Short-term hormonal influences on animal behavior usually occurring late in life - activational effects
2. A technique that associates a natural response to a stimulus to an unrelated stimulus; also called Pavlovian conditioning -- classical conditioning
3. The study of animal behavior in its natural environment - ethology
4. When an animal learns not to respond to a stimulus - habituation
5. Finding a solution to a once unsolvable problem - insightful learning
6. Learning that has taken place but is dormant until a situation requires it - latent learning
Explanation:
Activational effects are the sudden or immediate temporary transient effects of behavioral changes due to the influence of hormones, especially the gonodal or the sex hormones. The behavior change in male animals due to increase in male sex hormonal activity can be referred as activational effect.
Classical conditioning facilitates learning of a behavior when a conditioned stimulus is associated with an unconditioned stimulus leading to a conditioned response. Animal training by pairing a new unconditioned stimulus with an already known conditioned stimulus, a new conditioned response of behavior change can be observed.
Ethology refers to the scientific zoological study (includes both laboratory as well as natural field studies) of animals behavior with relation to their natural environment. It studies and compares about animal behavioral processes changes under various disciplines like ecology, anatomy, evolution etc.
Habituation is an associative learning process that results when an animal learns to resist a stimulus and not to respond to it after repeated exposure.
Insightful learning occurs when various parts of a problem is analyzed and their relationship is understood to arrive at the solution suddenly. Animals must look at a situation as a whole, observe and analyze it to solve the problem. Some animals like chimpanzees can learn through insightful learning
Latent learning occurs without any associated reinforcements. Animals learn new behavior through latent learning.
The terms are matched with their definitions: Activational effects matches with short-term hormonal influences, Classical conditioning is related to Pavlovian conditioning, Ethology is the study of animal behavior in its natural environment, Habituation is when an animal learns not to respond, Insightful learning is finding a solution to a problem, Latent learning is learning that is dormant until required.
Explanation:The terms and definitions can be matched as follows:
Short-term hormonal influences on animal behavior usually occurring late in life corresponds to activational effects.A technique that associates a natural response to a stimulus to an unrelated stimulus, also called Pavlovian conditioning, refers to classical conditioning.The study of animal behavior in its natural environment is also known as ethology.When an animal learns not to respond to a stimulus, it's defined as habituation.Finding a solution to a once unsolvable problem is the definition of insightful learning.Learning that has taken place but is dormant until a situation requires it is termed as latent learning.Learn more about Animal Behavior here:https://brainly.com/question/33412478
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Describe the crimes that the history detectives are investigating in the video
Answer:
They are evaluating a crime that had previously beem done in the 1800s.
The history detectives are searching for the murderer of the texas servant girls. This unknown murderer murdered six African American servants and two white women in a brief phase of time. It was really difficult to conclude if the atrocity was committed by a serial killer or if the atrocity was carried out by a group of persons.
The murderer held and led the women captive from there beds at the dead of the night and led them to a remote location where they were then murdered with a sharp substance, something similar to an axe. A vast majority of the women were sexually abused after they had been held and led captive away from their rooms.
measuring the
volume of an
object you are
finding the
A. single dimension of
an object.
B. amount of two
dimensional space an
object covers.
C. amount of three
dimensional space the
object occupies.
D. amount of four
dimensional space an
object occupies.
Answer:D. The amount of space occupied by a three-dimensional solid object.
Explanation:
Conclusions _____.
a. are experimental factors which do not change
b. can only be made if the hypothesis is proven true
c. are made from careful analysis of data
d. are formed before the experiment begins
The answer is C because conclusions are usually drawn at the end of an experiment, after going over the data you've collected while experimenting.
what are the advantages of a cell being so small, explain please
Answer: The main point about our cells being small is that they are all around faster and more efficient. Cells have such a small size for their own benefit. They are small in size to allow nutrients and other materials to diffuse through the cell membrane, they keep a small ratio of surface area to volume.
Why does liquid water have such a high heat capacity?
Choose 1 answer:
(Choice A)
Water is a nonpolar molecule.
(Choice B)
Water molecules are packed very closely together.
(Choice C)
Water is a linear molecule which makes absorbing heat easier.
(Choice D)
Water molecules are good at forming and breaking hydrogen bonds.
Answer:
Choice D
Explanation:
Water molecules exhibit hydrogen bonded to oxygen, which is considered a hydrogen bond. This is the strongest type of bond and is not easily broken. Once formed, a large amount of heat is needed to disrupt the bond energy and break apart the molecule. Therefore, water has a high heat capacity and can withstand higher temperatures than that of some other liquids.
what is required for a person to have cickle cell disease
Two genes for the sickle hemoglobin must be inherited from one's parents in order to have the disease.
Answer: Two alleles for mutated haemoglobin is required to have sickle cell disease
Explanation: Sickle cell disease is a genetic disorder in which an individual inherits two allele for sickled haemoglobin from the parents. Every trait is controlled by a pair of gene, one gene from each parent. For an individual to have sickle cell disease he must have two alleles for the mutated haemoglobin, one from each parent. Haemoglobin is a protein found in the red blood cells that binds and transports oxygen to the cells. Haemoglobin is a protein with four subunits: two alpha chains and two beta chains. In a mutated haemoglobin, valine replaces glutamate at position six of the two beta chains. This point mutation on the beta chains of haemoglobin causes the aggregation of haemoglobin, thus giving the red blood cells a sickle shape instead of a disc shape of normal haemoglobin. The allele for the sickle haemoglobin is represented as S and for an individual to have sickle cell disease, he or she must inherit one allele from each parent.
Which of the following types of electromagnetic radiation has the greatest energy
Answer: Gamma Rays
Explanation: They have the shortest wavelength, so they are the most intense ones. It might help to associate it with the Hulk.
Answer:
Gamma rays (γ)
Explanation:
Whatever your options are, if Gamma rays is one of the options, choose it. Gamma rays have the highest energies because they have the shortest wavelengths, and the highest frequencies among all other electromagnetic radiation.
Electromagnetic waves with a long wavelength occur at a ________ frequency and are ________ energetic.
A.
high; more
B.
low; more
C.
high; less
D.
low; less
As the energy of a wave length increases the length gets shorter.A wave with low frequency would have relatively low energy and a long wavelength.
What is Wavelength?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles.
The wavelength is more frequently described in nanometers (nm), which are units of 10-9 m, or angstroms (), which are units of 10-10 m, for infrared (IR), visible light (UV), and gamma radiation.
Frequency, which is defined as the quantity of wave cycles per second, and wavelength have an inverse relationship. The wavelength of a signal decreases with increasing frequency.
Therefore, As the energy of a wave length increases the length gets shorter. A wave with low frequency would have relatively low energy and a long wavelength.
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A Bird population nested along the banks of a river and fed off fish after new homes were built alongthe river the bird population declined. A change to which limiting factor was most likely responsible
Answer:
A - Space
Explanation:
2020 edge
A change to the space nearby is a limiting factor which most likely is responsible for the decline in bird population. Thus, the correct option is A.
What are the limiting factors?
A limiting factor is a variable of a system which causes a noticeable change in the output or another measure of a type of system. The limiting factor in an ecosystem is in a pyramid shape of the organisms which are going up from the producer organisms to higher consumers and so on.
Resources such as food, water, light, space, shelter and the access to mates are all the limiting factors. If an organism, group or the population does not have enough resources in the environment to sustain it, then the individuals will die eventually through starvation, desiccation and stress, or they will fail to produce offspring.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
A bird population nested along the banks of a river and fed off fish. After new homes were built along the river, the bird population declined. A change to which limiting factor was most likely responsible?
a. space
b. water
c. weather
d. sunlight
Explain how the earth surface can change as a result of global warming ?
Answer: the earths surface can change due to global warming in many different ways. some of them being and increase in average temperatures and temperature extremes, extreme weather events, ice melt, and sea levels and ocean acidification
Explanation:
Answer:
Global warming can lead to changes to the Earth’s surface through the melting of glaciers. This can lead to rising sea levels, causing flooding. Antarctica’s land mass is being decreased by the process.
Explanation:
sample answer on edge
to which two molecules does transfer RNA attach
Answer: messenger RNA and amino acids.
Explanation: A transfer RNA (tRNA) is a type of RNA whose function is to fetch and match the corresponding amino acid to the codon on the mRNA during translation. A tRNA has a three nucleotide sequence known as anticodon through which it attaches to the codon on the mRNA molecule. During translation, the codons on the mRNA molecule is read one after another by the ribosome while the tRNA attaches itself to the mRNA codon that is being read through its anticodon. The tRNA then fetches the corresponding amino acid from the cytosol and attaches it to the growing polypeptide chain.
Transfer RNA (tRNA) attaches to two specific molecules, amino acids, and messenger RNA (mRNA), during protein synthesis. Aminoacyl tRNA synthetases link the amino acid to tRNA, and the tRNA's anticodon binds to the mRNA's codon to correctly position the amino acid for incorporation into the protein.
Explanation:Transfer RNA, or tRNA, is crucial for the synthesis of proteins. The two specific molecules that tRNA attaches to are amino acids and messenger RNA (mRNA). The tRNA picks up free amino acids in the cytosol and transfers them to the ribosome, where protein synthesis occurs. At the ribosome, the tRNA recognizes specific three-nucleotide sequences called codons on the mRNA through its anticodon. The anticodon-codon interaction allows for the amino acid to be correctly added to the growing polypeptide chain.
tRNA molecules interact with various factors during this process, including aminoacyl tRNA synthetases, which attach the correct amino acid to the tRNA, and the ribosome itself, which facilitates the assembly of the amino acids into a protein. There are numerous types of tRNA, each corresponding to one or more codons that specify a particular amino acid.
A human skin cell contains 46 chromosomes. How many chromosomes are present in a human egg cell?
Answer:
Thus, if a skin cell or somatic cell contains 46 chromosomes then the egg or sperm (gametes) would contain only 23 chromosomes.
Explanation:
Half of the chromosomes (23 each) belong to one parent
Answer:
23 Chromsomes
Explanation
Thus, if a skin cell or somatic cell contains 46 chromosomes then the egg or sperm (gametes) would contain only 23 chromosomes
What could happen if the average temperature increased in an ecosystem?
• Populations of all organisms would increase because of the higher temperatures.
Organisms would quickly adapt to the change,
All organisms would die because of the change
Some organisms would not be welt-adapted to the higher temperatures
Answer:the earth would be to hot for a human or a palnt to handle the heat
Explanation:
Which list gives the proper sequence of energy changes that occur in a hydroelectric plant?
A Electrical energy is transferred via power lines
The turbine blades capture the kinetic energy of the water
The generator produces electrical energy
The mechanical energy of the turbine rotates the generator parts
B The mechanical energy of the turbine rotates the generator parts
The turbine blades capture the kinetic energy of the water
Electrical energy is transferred via power lines
The generator produces electrical energy
C The generator produces electrical energy
The mechanical energy of the turbine rotates the generator parts
The turbine blades capture the kinetic energy of the water
Electrical energy is transferred via power lines
D The turbine blades capture the kinetic energy of the water
The mechanical energy of the turbine rotates the generator parts
The generator produces electrical energy
Electrical energy is transferred via power lines
D
Explanation:
Flowing water has intrinsic kinetic energy that is harnessed to rotate the turbine. The turbine rotates hence gains mechanical energy because it is doing work. This work is used to rotate a dynamo of a generator which generates electricity. The mechanical energy is thus converted into electric energy by the dynamo. The electric energy is then carried by the power lines to the users.
Answer:
d
Explanation:
How is lateral gene transfer different from the gene duplication that occurs during cell division?
Lateral gene transfer different from the gene duplication that occurs during cell division due to their different functions.
Lateral gene transfer different from the gene duplication that occurs during cell division because lateral gene transfer is the transmission of gene between two individual while on the other hand, gene duplication is to make copy of the original gene.
Lateral gene transfer is the transmission of genes between individuals without direct vertical inheritance from parents to their offspring whereas, gene duplication is the process by which a region of DNA coding for a gene is copied so we can conclude that lateral gene transfer different from the gene duplication that occurs during cell division due to their different functions.
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Final answer:
Lateral gene transfer (LGT) involves the transfer of genes between unrelated species, contributing to rapid adaptation and evolution, particularly in bacteria. In contrast, gene duplication occurs within an organism during cell division, leading to additional gene copies that may evolve new functions over time. While both processes increase genetic complexity and contribute to evolutionary innovation, their mechanisms and implications differ significantly.
Explanation:
Lateral gene transfer (LGT) or horizontal gene transfer (HGT) is a remarkable process in which genes are transferred between unrelated species. This contrasts starkly with gene duplication during cell division, where genes within an organism are copied. LGT can dramatically influence the genetic composition and evolutionary potential of organisms by introducing entirely new genetic material. For example, LGT has played a critical role in bacterial evolution, allowing species to adapt rapidly by acquiring genes that confer beneficial traits such as antibiotic resistance.
On the other hand, gene duplication is a process occurring within an organism, often during cell division. Gene duplication can result from errors in DNA replication or meiotic crossing over, leading to the creation of additional copies of a gene. These duplicate genes can diverge over time, potentially fulfilling new roles within the organism. Such duplication events contribute to genetic diversity and complexity, serving as important engines of evolutionary innovation within species.
While both processes add to genetic complexity, their mechanisms, sources of genetic material, and evolutionary implications are distinct. LGT involves the transfer of genetic material between different species, often providing immediate adaptive advantages, while gene duplication involves the internal replication of genetic material within an organism, offering potential for new functionalities over evolutionary timescales.
When does a skydiver achieve terminal velocity?
Answer:
Based on wind resistance
Explanation: took the test
How do humans get phosphorus from the environment?
A) precipitation
B) evaporation
C) mining
D) agriculture
Answer:
C
Explanation:
phosphorus is considered as a material which could be found underground and can be harvested by mining