Answer;
Parasympathetic nervous system Sympathetic nervous system
Introduction The parasympathetic nervous system is one of the two main divisions of the autonomic nervous system (ANS). Its general function is to control homeostasis and the body's rest-and-digest response. The sympathetic nervous system (SNS) is one of two main divisions of the autonomic nervous system (ANS). Its general action is to mobilize the body's fight-or-flight response.
Function Control the body's response while at rest. Control the body's response during perceived threat.
Originates in Sacral region of spinal cord, medulla, cranial nerves 3, 7, 9, and 10 Thoracic and lumbar regions of spinal cord
Activates response of Rest and digest Fight-or-flight
Neuron Pathways Longer pathways, slower system Very short neurons, faster system
General Body Response Counterbalance; restores body to state of calm. Body speeds up, tenses up, becomes more alert. Functions not critical to survival shut down.
Cardiovascular System (heart rate) Decreases heart rate Increases contraction, heart rate
Pulmonary System (lungs) Bronchial tubes constrict Bronchial tubes dilate
Musculoskeletal System Muscles relax Muscles contract
Pupils Constrict Dilate
Gastrointestinal System Increases stomach movement and secretions Decreases stomach movement and secretions
Salivary Glands Saliva production increases Saliva production decreases
Adrenal Gland No involvement Releases adrenaline
Glycogen to Glucose Conversion No involvement Increases; converts glycogen to glucose for muscle energy
Urinary Response Increase in urinary output Decrease in urinary output
Neurotransmitters neurons are cholinergic: acetylcholine neurons are mostly adrenergic: epinephrine / norepinephrine (acetylcholine)
HELP ASAP!!! Will give brainliest and 50 points!!!
1. In pea plants, the gene for the color of the seed has two alleles. In the following Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Based on the Punnett square, what percentage of offspring would be expected to have yellow seeds?
A. 0%
B.25%
C. 50%
D. 100%
2. A tall pea plant (Tt) is crossbred with another tall pea plant (Tt). The following Punnett square shows the separated alleles for two pea plants.
Which of the following shows the correct match of the box numbers and the genotype of the offspring?
A 1 = Tt; 2 = tt; 3 = Tt; 4 = tt
B 1 = Tt; 2 = Tt; 3 = Tt; 4 = Tt
C 1 = TT; 2 = Tt; 3 = Tt; 4 = tt
D1 = TT; 2 = TT; 3 = Tt; 4 = tt
The percentage of offspring would be expected to have yellow seeds is C. 50%. The correct match of the box numbers and the genotype of the offspring is C. 1 = TT; 2 = Tt; 3 = Tt; 4 = tt
How to determine percentage and genotype?In the Punnett square for the gene determining seed color in pea plants, if the dominant allele (Y) represents yellow and the recessive allele (y) represents green, the possible genotypes for the offspring are YY, Yy, Yy, and yy. Only the first two genotypes (YY and Yy) will result in yellow seeds.
Therefore, 75% of the offspring would be expected to have yellow seeds.
In the Punnett square for the cross between two tall pea plants (Tt x Tt), the possible genotypes for the offspring are TT, Tt, Tt, and tt. Looking at the box numbers:
Box 1: TT
Box 2: Tt
Box 3: Tt
Box 4: tt
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Scientists have genetically engineered certain species to be more resistant to freezing temperatures. This was accomplished by scientists altering the
Answer:
genes
Explanation:
Scientists engineer crops to resist freezing temperatures by altering an organism's genetics, often transferring cold resistance genes from one species to another to create genetically modified organisms. Genetic engineering enhances agriculture but also raises safety and environmental concerns.
Scientists have genetically engineered certain species to be more resistant to freezing temperatures by altering the genetics of these organisms. They utilize genetic engineering to transfer genes that are responsible for cold resistance from one species to another. For instance, a gene giving antifreeze properties from an arctic fish can be spliced into the DNA of a tomato plant, resulting in a genetically modified organism (GMO) that can withstand colder climates. This technique is part of biotechnology and aims to enhance agricultural productivity by creating crops that can endure challenging conditions such as frost, which would normally destroy them.
The field of biotechnology and genetic engineering has led to the creation of transgenic plants and animals. This technology is applied not just to increase freeze tolerance, but also to enhance resistance to diseases, pests, and pesticides, improve nutritional content, and aid in the ripening process of food crops. While the development of genetically modified foods has primarily been driven by the goal of improving crop yields and quality, it has also raised issues concerning consumer safety and environmental implications.
NEED HELP ASAP
Is it more likely that the T. Rex would have a 3-chambered heart or a 4-chambered heart and why?
Question 14 options:
A 3-chambered heart because the caiman also has a 3-chambered heart and the T. Rex is most closely related to the caiman.
A 3-chambered heart because the parrot has a 3-chambered heart and the parrot is most closely related to the T. Rex.
A 4-chambered heart because the caiman also has a 4-chambered heart and the T. Rex is most closely related to the caiman.
A 4-chambered heart because the parrot has a 4-chambered heart and the parrot is most closely related to the T. Rex.
I believe the T-rex would have a 4-chambered heart, however I am unsure if the T-rex is closer related to the parrot or the caimen.
T. Rex would have 4 chambered heart because it is closely associated with Parrot due to common ancestry.
Explanation:T. Rex is Tyrannosaurus rex which was basically considered to be cold-blooded and related to reptile but to some recent findings of fossil related to T. Rex shows that they are warm-blooded and they are related to bird family which includes chicken, parrot, and ostriches.
The T. Rex had four chambers in its heart. The proof is that the parrot had four chambers in its heart and the T Rex and the parrot have a typical family. So, the parrot and the T Rex well offer qualities that are similar.
Also, the parrot and T Rex are firmly related as opposed to the T Rex and the caiman.
Brainliest if correct!!
During which moon phase do spring tides occur?
new moon and full moon
first quarter and third quarter
waxing gibbous and waning gibbous
waxing crescent and waning crescent
Answer:
new moon and full moon
Explanation:
Tides occur due to gravitational force of the sun and the moon. During New moon and Full moon, the Sun and the Moon are aligned in a straight line. This alignment leads to strong effect of gravity on tides and highest high tides and lowest low tides occur. These tides are referred as spring tides.
Neap tides occur when the sun and the moon are aligned at right angles. Effect of gravity is minimum and low tidal range is observed.
The answer is A
New moon and full moon
Which organ system produces the most heat?
Answer:
Muscular System
It helps to move the body and move materials through the body and also creates most body heat.
Hope this helps and have a great day!!!
[tex]Sofia[/tex]
Pheasants do not feed their chicks. Immediately after hatching, a pheasant chick starts pecking at seeds and insects on the ground. Based on your understanding of animal behavior, what is a reasonable explanation for these observations?A. Pecking is an example of associative learning.B. Pecking is the result of imprinting during a critical period.C. Pheasants learned to peck, and their offspring inherited this behavior.D. Pheasants that pecked immediately after hatching had the highest survival and reproductive success
Answer:
D. Pheasants that pecked immediately after hatching had the highest survival and reproductive success
Explanation:
This means that behavior of pecking increased their survival and reproductive success and become favorable by natural selection.
Natural selection is evolutionary mechanism which favours traits (structures, behavior) of an organism that help him survive and reproduce. In the example, above, pheasants that pecked survived and that was the favorable trait by natural selection.
How do scientists recognize that a climax community has been reached? A. The succession of community is completed. B. No more natural resources are available to support the community. C. The population of a community stabilizes and doesn't change in size or scope. D. The environment is unable to cause changes to that community.
Answer: A. the succession of community is completed
Explanation:
GeoPanther ur answer is wrong, just retook my test and C was wrong, it showed me the correct answer
A climax community is indicated by the stabilization of a community's population and composition, which remains unless a significant disturbance occurs, resulting in the final stage of ecological succession.
Explanation:Scientists recognize that a climax community has been reached when they observe that the population of a community stabilizes and doesn't significantly change in size or scope, indicating the final stage of ecological succession. This means the succession of communities is completed, resulting in a stable balance of all organisms within the ecosystem.
The climax community will remain relatively stable unless a significant disturbance, like a disaster, alters the ecosystem, starting succession anew. It is important to note that what constitutes a climax community can vary greatly depending on the region's climate and geology, such as tropical rainforests in the tropics or coniferous forests in northern areas.
The four major categories of tissues are _____.
The 4 major categories of tissues are the muscle tissue, nervous tissue, connective tissue, and the epithelial tissue.
Compare and contrast Kingdom Animalia with Kingdom Plantae. What two fundamental characteristics do they share? Which two are different?
Answer:
a) Both have an eukaryotic cell type.
In both multicellularity is present in all forms.
b) Kingdom plantae have a rigid cell wall while in kingdom animalia they lack a cell wall.
Kingdom plantae autotrophic in nature while kingdom animalia are heterotrophic in nature.
Explanation:
The kingdom plantae and kingdom animalia their cells nucleus are enclosed by membranes that selectively allows molecules ,ions or other small particles into the cell thus they are said to be eukaryotic., They also have more than one cell that perform different functions and have different characteristics thus leading to tissue and organ development.In kingdom plantae the cell wall protects the cell from mechanical damage and enable the plants to grow in greater heights unlike in kingdom animalia where the animals have skeletons and musculature.In kingdom plantae most plants have chlorophyll thus they manufacture their own food through a process called photosynthesis (changing inorganic materials to organic molecules)thus gaining energy for growth unlike in kingdom animalia where the organisms feed on other organisms for their energy.While both Kingdom Animalia and Kingdom Plantae are built from eukaryotic, multicellular organisms, they differ fundamentally in how they obtain energy (heterotrophy vs. autotrophy) and in the structural composition of their cells (absence vs. presence of a cell wall).
The two fundamental characteristics that Kingdom Animalia and Kingdom Plantae share are:
1. Eukaryotic cells: Both animals and plants are made up of eukaryotic cells, which means their cells have a true nucleus enclosed within membranes.
2. Multicellularity: Both kingdoms consist of organisms that are multicellular, meaning they have many cells that work together to perform various functions necessary for survival.
The two fundamental characteristics that are different between Kingdom Animalia and Kingdom Plantae are:
1. Nutrition: Animals are generally heterotrophic, meaning they cannot produce their own food and must consume organic matter from other organisms. In contrast, plants are autotrophic, as they can synthesize their own food through the process of photosynthesis using sunlight, water, and carbon dioxide.
2. Cell wall: Plant cells have a rigid cell wall made of cellulose, which provides structural support and protection. Animal cells do not have a cell wall, which allows them to have a variety of shapes and sizes and to be more flexible.
Kingdom Animalia and Kingdom Plantae are two of the major groups of living organisms. They share some common features due to their eukaryotic nature, but they also exhibit significant differences that reflect their distinct evolutionary paths and ecological roles.
Both animals and plants are composed of eukaryotic cells, which are more complex than prokaryotic cells found in bacteria and archaea. These eukaryotic cells contain membrane-bound organelles, such as the nucleus, mitochondria, and chloroplasts (in plants). The presence of a nucleus is a defining feature of eukaryotes, distinguishing them from prokaryotes.
Multicellularity is another characteristic shared by animals and plants. This trait allows for the division of labor among cells, leading to the development of specialized tissues and organs. This specialization enables complex functions and interactions with the environment.
Despite these similarities, animals and plants differ in their modes of nutrition and cellular structure. Animals are heterotrophs, which means they must ingest organic compounds from other organisms to obtain energy and nutrients. This can involve consuming plants, other animals, fungi, or bacteria. In contrast, plants are autotrophs, capable of synthesizing their own organic compounds through photosynthesis. This process takes place in the chloroplasts of plant cells, where sunlight is converted into chemical energy, fixing carbon dioxide into organic molecules like glucose.
The presence of a cell wall is a key structural difference between plant and animal cells. The cell wall in plants is primarily made of cellulose, a complex carbohydrate that provides strength and rigidity, allowing plants to stand upright and resist mechanical stress. Animal cells, on the other hand, lack a cell wall, which gives them the flexibility to change shape and move. This flexibility is crucial for processes such as immune responses, tissue repair, and the mobility of individual cells like white blood cells.
These differences are essential for understanding the diverse ways in which these organisms interact with each other and their environment."
If a person suffered a stroke which brain region is damaged
Answer:
The right side
Explanation:
Arrange the sequence of events at the NMJ from first to last. Rank the sequence of events at the NMJ that initiate an action potential in the muscle fiber, from first to last. View Available Hint(s) ResetHelp Action potential arrives at the axon terminal.Action potential arrives at the axon terminal. Acetylcholine binds to its receptors on the junctional folds.Acetylcholine binds to its receptors on the junctional folds. Calcium ions enter the axon terminal.Calcium ions enter the axon terminal. Synaptic vesicles fuse to membrane of axon terminal.Synaptic vesicles fuse to membrane of axon terminal. Junctional folds become depolarized.Junctional folds become depolarized. Action potential is initiated on the sarcolemma.Action potential is initiated on the sarcolemma. Acetylcholine is released into the synaptic cleft.Acetylcholine is released into the synaptic cleft.
The events at the neuromuscular junction (NMJ) that initiate an action potential in a muscle fiber involve action potential reaching the axon terminal influx of calcium ions release of acetylcholine into the synaptic clef binding of acetylcholine depolarization of muscle fiber and initiation of action potential on sarcolemma.
Explanation:The sequence of events at the NMJ (Neuromuscular Junction) that initiates an action potential in the muscle fiber follows a specific order:
Action potential arrives at the axon terminal of a motor neuron. Calcium ions enter the axon terminal prompted by the action potential. Synaptic vesicles fuse to the membrane of the axon terminal, prompted by the influx of calcium ions. Neurotransmitter acetylcholine is released from these vesicles into the synaptic cleft. The released acetylcholine binds to its receptors on the junctional folds of the muscle fiber. Folds become depolarized as positive ions pass into the muscle fiber. This depolarization initiates the action potential on the sarcolemma of the muscle fiber. Learn more about Neuromuscular Junction here:
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This sequence accurately describes the process of neurotransmission at the NMJ, which is critical for the activation of muscle fibers."
"The correct sequence of events at the neuromuscular junction (NMJ) that initiate an action potential in the muscle fiber, from first to last, is as follows:
1. Action potential arrives at the axon terminal.
2. Calcium ions enter the axon terminal.
3. Synaptic vesicles fuse to the membrane of the axon terminal.
4. Acetylcholine is released into the synaptic cleft.
5. Acetylcholine binds to its receptors on the junctional folds.
6. Junctional folds become depolarized.
7. Action potential is initiated on the sarcolemma.
Here is the detailed explanation and logic behind the sequence:
1. Action potential arrives at the axon terminal. This is the initial event that triggers the subsequent release of neurotransmitters. The action potential travels down the motor neuron until it reaches the axon terminal.
2. Calcium ions enter the axon terminal. The arrival of the action potential at the axon terminal opens voltage-gated calcium channels, allowing calcium ions to flow into the terminal from the extracellular space.
3. Synaptic vesicles fuse to the membrane of the axon terminal. The influx of calcium ions triggers a cascade of events that lead to the fusion of synaptic vesicles, which contain acetylcholine, with the presynaptic membrane.
4. Acetylcholine is released into the synaptic cleft. Once the synaptic vesicles fuse with the membrane, they release their contents, including acetylcholine, into the synaptic cleft.
5. Acetylcholine binds to its receptors on the junctional folds. Acetylcholine diffuses across the synaptic cleft and binds to acetylcholine receptors located on the junctional folds of the muscle cell membrane (sarcolemma).
6. Junctional folds become depolarized. The binding of acetylcholine to its receptors opens ion channels, leading to an influx of sodium ions and an efflux of potassium ions, which causes a local depolarization of the muscle cell membrane at the junctional folds.
7. Action potential is initiated on the sarcolemma. If the depolarization at the junctional folds is sufficient to reach the threshold, it will trigger an action potential that propagates along the sarcolemma, leading to muscle contraction.
Which term best describes a condition that presents with the symptoms of petechiae, easy bruising, bleeding gums, occult hematuria, or retinal hemorrhages?
Answer:
Contractile
Explanation:
PLEASE HELP ASAP - 15 POINTS
Energy from the Sun enters ecosystems through the transformation of light to chemical energy. This energy is available to different organisms based on the trophic level in which the organisms exist. Which statement BEST describes the availability of energy for organisms in different trophic levels?
A. Primary consumers have the least energy available.
B. Available energy decreases as trophic levels increase.
C. Available energy increases as trophic levels increase.
D. Tertiary consumers have the most energy available.
Answer:
the answer is b
Explanation:
Available energy decreases as trophic levels increase. Therefore, option (B) is correct.
This is because energy is lost at each step in the food chain due to inefficiencies in energy transfer and metabolic processes. Primary producers, such as plants, convert a small portion of the Sun's energy into chemical energy through photosynthesis. Primary consumers, such as herbivores, eat the plants and extract some of the stored energy.
However, only a portion of the energy in the plants is converted into the herbivore's biomass, and some energy is lost as heat and waste products. Secondary consumers, such as carnivores, eat the herbivores and extract even less energy. Tertiary consumers, such as top predators, eat the carnivores and extract the least amount of energy. Therefore, the energy available to organisms decreases as you move up the trophic levels.
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Which describes a grizzly bear's habitat? All the biotic factors in the ecosystem all the abiotic factors in the ecosystem the role of the bear in the ecosystem the physical area where the bear lives
A habitat contains the homes or habitats of these species... It is the actual home of all species... Our houses are actually our habitats...
Therefore, the answer is:
the physical area where the bear lives
Answer:
The physical area where the bear lives
Explanation:
Habitat refers to the natural environment or the natural place where an organism lives. Habitat also refers to the physical place where a species or a population lives. Hence, habitat of grizzly bear refers to the physical place where it lives. Biotic and abiotic components of habitat together make an ecosystem.
Which of the following statements about action potentials in a given neuron is false? a. All action potentials for a given neuron are identical in magnitude.b. All action potentials for a given neuron are identical in duration.c. Action potentials are propagated down the length of the axon.d. Movement of ions during the action potential occurs mostly through the sodium pump.e. The frequency of action potentials, not their size, is the meaningful signal.
Answer:
They are propogated down the length of the dendrite
The false statement about action potentials in a given neuron is that the movement of ions occurs mostly through the sodium pump.
Explanation:The false statement about action potentials in a given neuron is (d) Movement of ions during the action potential occurs mostly through the sodium pump. The movement of ions during an action potential actually occurs through ion channels in the neuron's cell membrane, not through the sodium pump. The sodium pump is responsible for restoring the ion concentration gradients after an action potential, but it does not play a direct role in the action potential itself.
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Which of the following structures consists mainly of white matter?
Corpus callosumCerebral cortexThalamusCaudate nucleusBroca area
Answer:
The corpus callosum
Explanation:
The corpus callosum is the largest white matter structure in the brain. It is located beneath the cerebral cortex and it connects the left and right cerebral hemispheres thus enabling communication between them. The corpus callosum is a bundle of nerve fibers, (axon projections) which transmits neural signals.
The corpus callosum mainly consists of white matter and connects the two hemispheres of the brain.
Explanation:The structure that consists mainly of white matter is the corpus callosum. The corpus callosum is a large bundle of nerve fibers that connects the two hemispheres of the brain, allowing communication between them. It is mainly made up of myelinated axons, which give it a white appearance.
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A city grid of Anytown, U.S.A is shown on the grid below. The fire department is represented by quadrilateral RSTU. Another fire department is opening in a different part of the city to maximize fire protection. The size of the new department's property must be congruent to the older department. Vertices A and B are plotted on the grid to represent two vertices of the new fire department quadrilateral ABCD.. . . . What could be the ordered pairs representing vertices C and D of quadrilateral ABCD so that the new fire department is congruent to the old fire department?
Answer:
b
Explanation:
Which of the following conditions is the most likely indicator of a population in an extinction vortex?A) The species in question is found only in small, stable pockets of its former range.B) The effective population size of the species falls below 1,000.C) Genetic measurements indicate a loss of genetic variation over time.D) The population is permanently small.
C. Genetic measurements indicate a loss of genetic variation over time
The most likely indicator of a population in an extinction vortex is when the population is permanently small.
Explanation:The most likely indicator of a population in an extinction vortex is when the population is permanently small (option D). This means that the population size is consistently low and does not increase over time. In an extinction vortex, the population is unable to grow and is at a high risk of eventually becoming extinct.
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Agile methods in science engineering take which of the following approaches towards creating solutions?
A. Create multiple hypotheses about why a phenomenon is occurring and conduct research on all the possible outcomes.
B. Focus on more than one problem at a time so the project team can spread out their resources.
C. Quickly generate and implement solutions to assess the fit of the solutions to the problem.
D. Carefully generate several solutions and build them to test all at the same time
Answer:
Option C, Quickly generate and implement solutions to assess the fit of the solutions to the problem.
Explanation:
Agile methodology is a tool through which continuous iteration is done to provide solution which could fit in the development process of software for a better design. Through this method errors could be easily fixed in the middle of any project. Each iteration procedure is followed by a testing procedure whenever a new function or logic is released.
Hence, option C is correct.
How are fish and human embryos similar?
Trick question they are not similar
A worm that is solid from the gut epithelium to the outermost epithelium would be considered A) coelomate. B) acoelomate. C) pseudocoelomate. D) diploblastic
If by solid meaning there is no cavity in the body, then it would be acoelomate. The wording is sort of throwing me off
(B.) Acoelomate is possibly correct if i'm wrong then i'm sorry . . Only a 10Th grader
The three general guidelines to control pollution are
~Reuse
~Reduce
~Recycle
Hope this helps:)
Answer:
Management, Prevention, and Cure
The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements? A. Enzymes function best at a specific temperature.B. The body needs to be warm to prevent hypothermia.C. The body is kept relatively warm to prevent too much enzyme action. D. There is no connection between the two statements.
Answer:
A. Enzymes function best at a specific temperature.
Explanation:
One of the factors that determinate the enzyme activity is temperature. Each enzyme has a temperature optimum (the temperature at which its activity is the highest) and it corresponds to the normal body temperature for humans (around 98.6 degrees Fahrenheit or 37 degrees Celsius). Some of them can work on lower temperatures while some of them can increase their activity with the increase in temperature. But, since enzymes are usually proteins, high temperature (above 40 degrees Celsius) might denature them and consequently enzymes lose their activity.
Which trophic level is most vulnerable to extinction?A.tertiary consumer levelB.producer levelC.secondary consumer levelD.primary consumer level
Answer:
a. Tertiary consumer level
The most important renal mechanism for regulating acid-base balance of the blood involves __________.
Answer:
the kidneys
Explanation:
The kidneys help maintain the acid–base balance by excreting hydrogen ions into the urine and reabsorbing bicarbonate from the urine.
A fly has two alleles for the color of its eyes. the green allele is recessive, and is represented by q. the blue allele is dominant, and is represented by p. if 71 of 100 organisms are green, what is p
Answer:
[tex]p = 0.29\\[/tex]
Explanation:
According to the Hardy Weinberg’s equation –
The sum of frequencies of all the allele with in a given population is equal to one around the locus.
Thus, if p is frequency of trait “A” and q is frequency of trait “B”, then the sum of the allele frequencies i.e p and q is 1
[tex]p + q = 1[/tex] -------------------- Equation (a)
So, if 71 out of 100 organisms are green, then q would be
[tex]= \frac{71}{100}[/tex]
[tex]= 0.71\\[/tex]
Putting the value of q in equation "a" we get -
[tex]p + 0.71 = 1\\p = 1 - 0.71 \\p = 0.29[/tex]
Answer:
0.16
Source: trust me bro
The most common kind of dispersion in nature is
A) clumped.
B) random.
C) uniform.
D) indeterminate.
E) dispersive.
Answer:clumped is the most common kind of distribution in nature
Explanation: trust me
I believe the answer would be a clumped as well
When lifting a heavy weight, more motor neurons are called into action to overcome the weight by creating a greater tension. this phenomenon is known as _________?
Answer:
The answer is recruitment.
Hope this helps
Thymine dimers can be repaired by Photoreactivation Repair or Nucleotide Excision Repair. - true or false?
Answer:True
Explanation:Basically thymine diamers are mismatched pairs (thymine binds with another thymine instead of binding with adenine) and may lead to unwanted results so the mismatching can be repaired by using two methods which are as follows :
1-the PRE enzyme activated by blue light breaks the thymine diamer and some of the surrounding bonds the strand is cut and DNA polymerase then restores the normal base pairing
2-UVR system breaks dimer creating a gap when a gap is created and the molecules appear unpaired it is filled by proof readers hence restoring normal base pairing.
The claim that thymine dimers can be repaired through both Photoreactivation Repair and Nucleotide Excision Repair is true. These mechanisms are crucial for DNA repair in cells that have been exposed to UV light, as they help maintain the integrity of the genetic material.
Explanation:The statement that thymine dimers can be repaired by Photoreactivation Repair or Nucleotide Excision Repair is true. Thymine dimers are formed when DNA is exposed to ultraviolet (UV) light, causing adjacent thymine bases to bond together improperly. In bacteria, nucleotide excision repair operates by recognizing the distortion in the DNA around the thymine dimer. An enzyme complex then excises the affected strand, and DNA polymerase and DNA ligase fill in and seal the gap with correct nucleotides. In addition, photoreactivation repair specifically reverses thymine dimers with the help of the enzyme photolyase, which binds to the dimers and, in the presence of visible light, breaks them apart, thus restoring the normal base pairing.
A bond of the following elements would be of what type?
Drawing a model may be helpful. C + 4H
a. covalent
b. ionic
Answer:
I’m pretty sure the answer is covalent
Hope this helps have a good day :) please mark me the brainliest?
Answer: Option (a) is the correct answer.
Explanation:
Atomic number of carbon is 6 and its electronic distribution is 2, 4. Hence, to complete its octet it needs to acquire 4 more electrons from another atom.
Whereas atomic number of hydrogen is 1 and in order to complete its octet it needs to gain one more electron.
So, when a carbon atom comes in contact with 4 hydrogen atoms there there occurs sharing of valence electrons by each atom.
As it is known that a bond formed by sharing of electrons is known as a covalent bond.
Thus, we can conclude that in [tex]C + 4H \rightarrow CH_{4}[/tex] the bond formed between the elements is covalent bond.