Answers
In both prokaryotes and eukaryotes, replication proceeds in both directions from each origin,The two strands of NA at the origin are separated, allowing the formation of a replication bubble and
Bacterial chromosomes have a single origin, but eukaryotic chromosomes have many origins these three statement are true for replication.
Eukaryotic chromosomes have several replication origins, whereas prokaryotic chromosomes only have one.
Prokaryotes don't have as many replication sources as eukaryotes do.
DNA is found in bacteria as a protracted loop that is floating in the cytoplasm of the cell.
The DNA in eukaryotic cells is linear, housed in chromosomes, and safeguarded inside the cell nucleus.
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Complete question : Replication is a process that synthesizes a new strand of complementary DNA. Which of the following statements is true about replication origins?
a. In both prokaryotes and eukaryotes, replication proceeds in both directions from each origin.
b. The two strands of NA at the origin are separated, allowing the formation of a replication bubble.
c. Eukaryotic chromosomes have a single origin, but bacterial chromosomes have many origins,
d. Bacterial chromosomes have a single origin, but eukaryotic chromosomes have many origins
Related Questions
state the general name for plants that live in and are adapted for dry conditions
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In the presence of saturating amounts of oxaloacetate, the activity of citrate synthase from pig heart tissue shows a sigmoid dependence on the concentration of acetyl‑CoA. When succinyl‑CoA is added, the curve shifts to the right and the sigmoid dependence is more pronounced.
Choose the statements that are reasonable explanations for the right-ward shift of the velocity curve caused by succinyl-CoA.
a. Succinyl-CoA competes with dissociation of CoA as a product of the reaction.
b. Succinyl-CoA binds covalently to the enzyme.
c. Succinyl-CoA binds at a regulatory site other than the active site.
d. Succinyl-CoA competes with acetyl-CoA for binding at the active site.
e. Succinyl-CoA competes with oxaloacetate for binding at the active site.
Answers
Answer:
c. Succinyl-CoA binds at a regulatory site other than the active site
Explanation:
The sigmoid saturation curve is a property of of allosteric enzymes which reflects the cooperaive interactions between the protein subunits in the enzymes.
Allosteric enzymes function through reversible, non-covalent binding of regulatory compounds called allosteric modulators.
Allosteric enzymes have different binding site for the substrate and for their allosteric modulator.
In the citric acid cycle, succinyl-CoA serves as as allosteric inhibitor of citrate synthase which catalyses the production of citrate from oxaloacetate and acetyl-CoA.
From the given options:
a. Succinyl-CoA competes with dissociation of CoA as a product of the reaction is wrong because it has its own binding site as an allosteric modulator.
b. Succinyl-CoA binds covalently to the enzyme is wrong because allosteric enzymes functions through non-covalent interactions.
c. Succinyl-CoA binds at a regulatory site other than the active site is true because citrate synthase is an allosteric enzyme
d. Succinyl-CoA competes with acetyl-CoA for binding at the active site is wrong because acetyl-CoA binds to the active site while succinyl-Coa binds to the regulatory site.
e. Succinyl-CoA competes with oxaloacetate for binding at the active site is wrong because oxaloacetate binds to the active site while succinyl-Coa binds to the regulatory site.
Rachel Carson ushered in modern environmentalism with her book ______ _______ which discussed threats to human and other species form chemical pollution.
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Rachel Carson's influential work, 'Silent Spring', ushered in modern environmentalism. It critiqued the chemical industry and led to significant changes in environmental laws.
Explanation:Rachel Carson ushered in modern environmentalism with her book 'Silent Spring', which discussed the threats to human and other species from chemical pollution. Rachel was a marine biologist and conservationist whose book brought environmental concerns to the attention of the American public by presenting a powerful critique of the chemical industry, particularly the use of pesticides. The impact of the book was significant and led to a nationwide ban on DDT and other pesticides. It also spurred changes in the laws regulating our air, land, and water. Carson's environmental advocacy and her book, 'Silent Spring', remain as influential today as they were in the 1960s.
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Forested floodplain wetlands benefit from periodic flooding from rivers. When floodwaters spill into the wetland, they bring water and nutrients and leave both behind. But humans have often cut off floodplains from rivers by building roads, levees, berms, etc. Think about what would happen if a river could no longer flood into these areas. How would the resulting increased amount of water and nutrients in the river affect soils, hydrology, and life downstream?
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The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.
If a river can no longer flood into forested floodplain wetlands due to human interventions, it would have significant consequences for the downstream areas in terms of soils, hydrology, and life.Without periodic flooding, the increased amount of water and nutrients in the river would not be able to disperse and be deposited in the floodplain wetlands. As a result, downstream soils would experience a decrease in nutrient inputs, leading to decreased fertility and altered composition. The absence of regular flooding would disrupt the natural hydrological cycle, reducing the recharge of groundwater and altering the flow patterns in the river system. This could result in decreased water availability, increased erosion, and changes in the overall ecosystem dynamics downstream.The disruption of nutrient flows and hydrological patterns would also have a significant impact on the life forms downstream. Aquatic plants, fish, and other organisms that depend on floodplain wetlands for breeding, feeding, and shelter would face habitat loss and reduced food availability. This, in turn, could disrupt the food chain and impact the abundance and diversity of aquatic and terrestrial species in the downstream areas.The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.For more such questions on flooding
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Video: Washington State is Thinning Out Forests to Reduce Wildfire Risk. PLEASE ANSWER QUESTIONS ASAP!!
1. What is Russ Vaagen producing in his new sawmill?
2. How do his methods differ from logging that was done in the past? How does this help prevent fires?
3. How has Mike Peterson’s opinion on logging evolved? Why did he change his mind?
4. Do you think that this type of logging solution will work in the long run? Why or why not
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Answer:
Explanation:
1
What makes up the mantle
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A cell's ___ is where its RNA is.
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Answer:
cytoplasm
Explanation:
Transfer RNA (tRNA) is found in the cytoplasm and has a complex shape. It is responsible for carrying amino acids from the cytoplasm to the ribosome surface, ready to make a protein as instructed by the mRNA.
X-ray crystallography is a very important process that is used to help identify the structure of molecules. What exactly does this process show?
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Answer:
can reveal the precise three-dimensional positions of most atoms in a protein molecule because x-rays and covalent bonds have similar wavelength, and therefore currently provides the best visualization of protein structure.
Because x-rays and covalent bonds have comparable wavelengths, they can now give the finest imaging of protein structure because they can reveal the precise three-dimensional locations of the majority of atoms in a protein molecule.
What is X-ray crystallography?
X-ray, a scientific technique called crystallography may be used to map out the atoms of a crystalline material in three dimensions. By using most crystalline materials' interatomic gap as a diffraction gradient for x-ray radiation, which has wavelengths on the order of 1 angstrom, this method makes use of the interatomic spacing of most crystalline solids.
Wilhelm Rontgen made the discovery of x-rays in 1895. Up until 1912, there remained disagreement about whether x-rays constituted electromagnetic energy or particles. Researchers recognized that this light's wavelength would need to be in the range of 1 Angstrom (A) if the wave theory was accurate.
It would be necessary to use a gradient with separation on the same order of magnitude as the light for diffraction and measurement of such tiny wavelengths.
To diffract the x-ray beams, the arrangement of the atoms must be in an ordered, periodic form. The specific arrangement of atoms in that crystal is then revealed through a sequence of mathematical computations to create a diffraction pattern. The principal technique still in use today for studying the structure and bonding of organometallic compounds is X-ray crystallography.
Therefore, since x-rays and covalent bonds can display the precise three-dimensional locations of the majority of atoms in a protein molecule, they provide the best imaging of protein structure currently achievable.
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The statement "all objects in the universe attract each other," is an example of which of the following
Answers
Hope this helps
What type of organisms is this?
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The type of organism shown in the image above is a plant.
What is an organism?An organism in biology is a discrete and complete living thing, such as animal, plant, fungus or microorganism.
Also, it can be described as any complex thing with properties normally associated with living things.
Living organisms belongs to five major groups called kingdom and are as follows:
PlantaeAnimalsFungiMoneraProtistaPlants are organisms that are not an animals, especially an organism capable of photosynthesis. Based on the image above, the organism shown is a plant.
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which sentence is the best example of living things reproducing to make more of their kind?
Answers
Answer: C
Explanation:
Answer:
D. A male robin and a female robin care for eggs that combine genes from both robins.
Explanation:
it is
The sex chromosome of plants were first discovered in?
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Answer: The chromosome was discovered for the first time in Melandrium.
Explanation:
These plants have XX-XY mechanism of sex determination, wherever the male plant is heterogametic and carries “XY” chromosome, while feminine plant carries 2 copies of X-chromosomes (XX) as sex chromosomes.
1. Select all of the below that are examples of assortative mating.
a. Japanese common toads prefer mates who are the same size as themselves.
b. Sea urchins release their gametes into the ocean for mating.
c. White-throated sparrows with white-striped crowns prefer to mate with individuals who have tan-striped crowns (and vice versa).
d. The model laboratory plant Arabidopsis thaliana reproduces through self-fertilization.
2. which of the following requirements for hardy-weinberg equilibrium is not associated with an evolutionary mechanism?
a. a large (infinite) number of individuals
b. no natural selection random mating
c. no migration between populations
d. no mutation
Answers
Assortative mating, in human genetics, a form of nonrandom mating in which pair bonds are established on the basis of phenotype (observable characteristics).
What is Assortative mating?A person may choose a mate according to religious, cultural, or ethnic preferences, professional interests, or physical traits.
Positive assortative mating, or homogamy, exists when people choose to mate with persons similar to themselves (e.g., when a tall person mates with a tall person); this type of selection is very common.
Negative assortative mating is the opposite case, when people avoid mating with persons similar to themselves. Assortative mating also occurs in nonhuman animal populations. Indeed, phenotypic similarity is thought to underlie mate selection in a variety of species.
Therefore, Assortative mating, in human genetics, a form of nonrandom mating in which pair bonds are established on the basis of phenotype (observable characteristics).
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Water power is a clean and renewable source of energy, but has many drawbacks. Which of the statement describes how hydropower does not impact the environment?
A)
Large dams and reservoirs flood land habitats and change them to water habitats, forever changing the landscape and environment.
B)
Dams block the migration of fish.
C)
Dams trap moving sediment causing sand depletion and reservoir damage.
D)
Large dams create earthquakes, which increases the probability of dam failure and flooding.
E)
All of the above
Answers
Answer:
B
Explanation:
Hope it helps....
Answer:
D. Dams don't create earthquakes, but the do all of the other things listed.
The ability of trees to transport water hundreds of feet up from the roots is at least partially due to...
A. water’s high density.
B. cohesion of the water molecules to each other and the adhesion of the water molecules to the tree.
C. water’s high boiling point.
D. adhesion of tree molecules with the water molecules.
E. a neutral pH.
Answers
Answer:
option B. cohesion..........tree.
A hand cranked flashlight represents:
light to mechanical
chemical to light
mechanical to light
Answers
Answer:
chemical to mechanical
In which phase of photosynthesis is oxygen released
Answers
Photosynthesis is divided into 2 phases: light phase or light-dependent and dark phase or light-independent.
The light phase is so called because the energy of the photons of sunlight is captured in this phase. This energy is transferred to the electrons of the plant which are previously provided by water molecules.
When water gives up its electrons in the thylakoid, H+ is released for energy production, and O2 molecules are released through the stomata during the light phase.
HELP PLZZZ
Describe the function of a cell as a whole and the ways parts of cells contribute to function. Give three to 4 parts of the cell and explain their function in your answer.
Answers
Explanation:
the function of cell to distribute blood to all parts and food
Why does a cat comes near when show it milk and runs away when you show it stick ?
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Cats have evolved certain behaviors that are influenced by their natural instincts and experiences.
When a cat sees milk, it may be attracted to it because it contains nutrients that are important for its survival, and the cat may associate the presence of milk with positive experiences. This can include nursing from its mother as a kitten or catching and consuming prey that contains milk or milk products.
On the other hand, when a cat sees a stick, it may perceive it as a threat or danger, and may associate it with negative experiences, such as being hit or attacked by a predator. This can trigger the cat's natural instinct to flee or hide from potential danger, as a survival mechanism.
Overall, a cat's behavior is influenced by its instincts, past experiences, and environmental cues. It may approach things that it perceives as positive or beneficial, and avoid or flee from things that it perceives as dangerous or threatening.
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Which statement is true of evergreen coniferous trees?
some leaves remain on the tree year-round
no organisms can eat the seeds of evergreen trees
evergreen trees only grow during the winter
there are no evergreen trees in the taiga
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The statement that is true of evergreen coniferous trees is that some leaves remain on the tree year-round. The correct answer is A.
Evergreen trees have adaptations that allow them to retain their leaves, also called needles, throughout the year.
Unlike deciduous trees that shed their leaves in the fall, evergreen trees continuously photosynthesize and produce food throughout the year.
This adaptation allows evergreen trees to grow in areas with harsh climates, such as the taiga, where the winters are long and cold.
Additionally, evergreen trees produce seeds that are often eaten by a variety of organisms, including birds and small mammals.
The seeds of some evergreen trees, such as pine nuts, are also a food source for humans. Therefore, the statement that no organisms can eat the seeds of evergreen trees is false.
Lastly, the statement that there are no evergreen trees in the taiga is also false.
The taiga is dominated by evergreen coniferous trees such as spruce, fir, and pine, which are well-adapted to the cold and snowy conditions of the region.
Therefore, the correct answer is A.
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Question
Which statement is true of evergreen coniferous trees?
A) some leaves remain on the tree year-round
B) no organisms can eat the seeds of evergreen trees
C) evergreen trees only grow during the winter
D) there are no evergreen trees in the taiga
Que consecuencia a la salud de las personas, genera la destruccion q la capa de ozono
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Explanation:
ghhhz7tjgzgzic,uzifsuruztzufuzfuzffzurzuzurfuzfuz
An organism has a haploid number of 20. What is the organism's diploid
number?
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Answer:
It is 20!
Explanation:
I did this before
Which cell has the largest problems due to surface area limitations
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Answer:
Terms in this set (217) Thinking about the surface of cells, which of these cells has the largest problems due to surface area limitations? Eukaryotic cells are 10-100 times the size of prokaryotic cells.
Consider an autosomal locus with alleles A and a. If the the allele frequencies are as follows Freq(A) = 0.4, Freq(a) = 0.6. then what is the predicted frequency of heterozygous Aa individuals, assuming the population is in Hardy- Weinberg equilibrium? Freq(Aa) = ? Enter a number between 0 and 1, inclusive, for example 0.33
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The predicted frequency of heterozygous is 0.42. The Hardy-Weinberg equation is expressed as p2 + 2pq + q2 = 1, where p is the frequency of the "A" allele and q is the frequency of the "a" allele in the population. In the equation, p2 represents the frequency of the homozygous genotype AA, q2 represents the frequency of the homozygous genotype aa, and 2pq represents the frequency of the heterozygous genotype Aa.
In addition, the sum of the allele frequencies for all the alleles at the locus must be 1, so p + q = 1. So if the frequency of an allele A is 0.7, then the frequency of allele a is 0.3. Therefore according to formula: (0.7)2 + 2Aa + (0.3)2 = 1
0.49 + 0.9 + 2Aa = 1
Aa = 0.42 (2Aa represents genotype frequency of genotype Aa)
The frequency of heterozygous Aa individuals can be calculated using the Hardy-Weinberg equation, which states that p2 + 2pq + q2 = 1, where p is the frequency of the dominant allele (A) and q is the frequency of the recessive allele (a).
We can substitute the frequencies given into the Hardy-Weinberg equation to solve for q2.
p2 + 2pq + q2 = 1
0.42 + 2(0.4)(q) + q2 = 1
q2 = 1 - 0.42 - 0.8q
q2 = 0.36 - 0.8q
We can then solve for q using the quadratic equation:
-0.8q2 + 0.8q - 0.36 = 0
q = [0.8 ± √(0.64 + 1.44)]/1.6
q = [0.8 ± √2.08]/1.6
q = [0.8 ± 1.44]/1.6
q = 0.3125 or 0.4875
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The planets Hox and Blox are near each other in the Dorgon system. The Dorgons have very advanced technology, and a Dorgon scientist wants to increase the pull of gravity between the two planets.
Which proposals would the scientist make to accomplish this goal? Check all that apply.
decreasing the distance between Hox and Blox
increasing the mass of Hox
increasing the distance between Hox and Blox
decreasing the mass of Blox
increasing the mass of Hox and Blox
decreasing the mass of Hox and Blox
Answers
Answer:
decreasing the distance between Hox and Bloxdecreasing the mass of Hox and Bloxdecreasing the mass of BloxExplanation:
Decreasing the distance between Hox and Blox will make it easier to increase the pull of gravity between the two planets, because less gravity would be needed to increase the pull of gravity. Hope that made sense. Decreasing the mass of Hox and Blox will decrease the amount of gravity needed to make the pull of gravity stronger. Because decreasing the mass of hox and blox is one of the correct answers ( of course i can't be 100% sure because the grader may be looking for different answers than normal), I am assuming that decreasing the mass of Blox is an answer too. Hope this made sense and helped.
Complete the following sentence.
If caregivers want to encourage infants between four and six months old to learn, they can provide _ books.
Answers
Answer:
they can provide reading or education books(numbers, colors, shapes, etc)
Explanation:
Answer: touch-and-feel
Explanation:
See E's section on crawling, standing up, working on walking, and coordinating hand and eye (subsection: eye-hand coordination):
"Textures are highly interesting to infants. By exploring different textures such as furry and soft versus slippery and cold, a baby is being stimulated and is learning about the world. Touch-and-feel books are very useful at this age [4-6 months], as are a wide variety of toys with different textures, such as plush stuffed animal toys and smooth building blocks."
A type of inheritance in which codominant traits are expressed together is called
Answers
Answer:
the answer would be A
Explanation:
The type of inheritance you're referring to is called codominance. But of course, you probably already knew that, didn't you? Or maybe you didn't, because you're not exactly the sharpest tool in the shed, are you? Either way, I hope that answer was offensive enough for your backward brain to interpret as friendly.
What is dark matter?
A. The asteroid belt B. Matter that does not emit light C. Black spots on the sun. D. None of the above
Answers
Answer:
None of the above because Dark matter is the name we give to all the mass in the universe that remains invisible
why practical sciences is often left out by teachers ?
Answers
Practical sciences are sometimes left out by teachers due to limited time and resources in educational institutions and may prioritize theoretical knowledge over practical application.
Additionally, practical sciences often require specialized equipment, facilities, or materials, which may not be readily available in schools. Moreover, teachers may feel more comfortable with traditional teaching methods and may lack the training or expertise to effectively integrate practical sciences into their curriculum.
Standardized tests and assessment frameworks that focus on theoretical concepts further discourage the inclusion of practical sciences. However, recognizing the importance of hands-on learning experiences, efforts should be made to bridge this gap and promote the integration of practical sciences into educational settings.
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Gradual changes of species structure inhabiting a geographical area
A)Secondary succession
B)Primary succession
C)both aquatic and primary succession
D)Both secondary and primary succession
Answers
Primary succession occurs in an area where no soil exists, such as on a newly formed volcanic island, while secondary succession occurs in an area where soil is present but has been disturbed, such as after a wildfire or deforestation. In both cases, gradual changes in species structure occur over time.