In DNA replication, the resulting daughter molecules contain one strand of the original parental DNA and one new strand. What is the explanation for this phenomenon? (A) DNA replication is semiconservative. (B) DNA replication is conservative. (C) DNA replication is not conservative. (D) RNA synthesis is conservative.
Answers
In DNA replication, the resulting daughter molecules contain one strand of the original parental DNA and one new strand. This phenomenon is explained by the fact that (A) DNA replication is semiconservative.
DNA replication is the process where the two strands of DNA separate and each acts individually as a parent strand to form the daughter strands in the 5' to 3' direction. One strand is formed as continuous leading strand whereas the other strand is formed as a discontinuous lagging strand.
The semiconservative form of DNA replicated was proved by Meselson and Stahl. They performed an ultra centrifugation of the DNA strands that gave bands at the top (of light DNA) and at the middle (of the hybrid DNA).
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Related Questions
Fill in the blanks below.
Gene _____ is more complex than Gene _____ because________________
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Answer:
I don't know if this will help, sorry if wrong.
Eukaryotic gene expression is more complex than prokaryotic gene expression because the processes of transcription and translation are physically separated.
Bones are covered and lined by a protective tissue called periosteum. The inner (osteogenic) layer consists primarily of ________. A) chondrocytes and osteocytes B) dense irregular connective tissue C) osteogenic cells D) cartilage and compact bone
Answers
Answer: C
Explanation:
Bones are covered and lined by a protective tissue called the periosteum. The inner (osteogenic) layer consists primarily of C) osteoblasts and osteoclasts.
which property is conserverd in chemical reactions but not in nuclear reactions
Answers
Answer:
mass
Explanation:
The flu viruses are a good example of virus evolution through: Group of answer choices genome reassortment. mutation. All of these are correct. genetic recombination.
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If you work together with someone when writing up a lab report, can you both use the same (or nearly identical) answer for any of the questions?
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When working together with someone to write a lab report, it is generally not recommended to use the same or nearly identical answers for any of the questions.The purpose of a lab report is to demonstrate your individual understanding of the experiment, the data collected, and the conclusions drawn from the analysis.
Using the same answers as your partner may give the impression that you have simply copied each other's work without understanding the underlying concepts or performing the necessary analysis independently. It can raise concerns about academic integrity and may be considered a form of plagiarism.
Furthermore, lab reports often require critical thinking and analytical skills to interpret the results and draw conclusions. If you and your partner have the exact same answers, it might indicate a lack of independent thinking and analysis, which are important skills to develop in a scientific or academic setting.
That being said, collaboration and discussion are valuable during the process of writing a lab report. Working together allows you to share ideas, clarify concepts, and check each other's understanding. You can discuss your findings, compare data, and even review each other's drafts. However, when it comes to providing individual responses to questions or sections of the report, it's essential to ensure that your answers reflect your own understanding and analysis of the experiment.
In summary, while collaboration is encouraged during the writing of a lab report, it is important to provide individual answers that reflect your own understanding and analysis. Copying or using nearly identical answers from a partner can compromise the integrity of the report and hinder your personal growth as a student or researcher
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43) which evidence suggests that upper motor neurons in the primary cortex have a preferred direction?
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One of the pieces of evidence that suggests upper motor neurons in the primary cortex have a preferred direction is the phenomenon of directional tuning.
Directional tuning refers to the fact that these neurons exhibit a higher firing rate when movement is directed in a specific preferred direction. Studies using single-neuron recordings in animal models have shown that when a monkey or other animals perform motor tasks, such as reaching or grasping objects in different directions, specific upper motor neurons in the primary cortex exhibit increased activity when the movement is in their preferred direction. Microstimulation studies in which small electrical currents are applied to specific areas of the primary cortex have also demonstrated that stimulating different locations can elicit specific movements in particular directions. This suggests that the upper motor neurons in those areas are organized according to a somatotopic map, with specific regions corresponding to different body parts and their preferred movement directions. The presence of directional tuning in upper motor neurons and the ability to elicit specific movements by stimulating different cortical areas provide evidence for the existence of a preferred direction in the primary cortex's upper motor neurons.
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Upper motor neurons in the primary cortex have a preferred direction as evidence from the "direction tuning" concept suggests.
The direction tuning concept is based on the observation that the preferred directions of upper motor neurons in the primary motor cortex are not random. They are distributed in a way that makes sense anatomically, indicating that this organization reflects the underlying organization of the musculature.
The direction tuning phenomenon is the strongest evidence for the existence of the preferred direction of upper motor neurons. When the stimulus is delivered in the neuron's preferred direction, it will produce a stronger signal than when it is delivered in a different direction.
In summary, the evidence that suggests that upper motor neurons in the primary cortex have a preferred direction is the direction tuning concept.
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what did the experiment by avery, macleod, and mccarty in 1944 with the r and s strains of streptococcus pneumoniae demonstrate
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The experiment by Avery, MacLeod, and McCarty in 1944 with the r and s strains of streptococcus pneumonia demonstrate that DNA (rather than proteins) has the ability to change the properties of cells.
Oswald Avery, Colin MacLeod, or Maclyn McCarty issued the outcomes of an experiment in 1944 that showed DNA is responsible to feed bacterial differentiation (the conversion of a specific strain of microorganisms to another strain for a chemical substance) and thus is likely to be bacteria's genetic material.
Proteases, which digest proteins, did not remove the transforming principle, according to Avery and McCarty. Lipases, which break down lipids, did not work either. They discovered that the material that transformed the substance was high in nucleic acids, however, Ribonuclease which usually digests RNA did not render it inactive.
Griffith found transformation in bacteria. He discovered that when a lethal pneumococcal strain's dead strain (S-type) is mixed with a nonlethal strain (R-type), the nonlethal strain (R-type) becomes lethal.
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Arrange the events in the order that they occur during DNA replication.
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DNA replication is a complex process that occurs during cell division, allowing for the accurate transmission of genetic information from parent cells to daughter cells. Initiation Elongation Termination
Initiation: Replication begins at specific sites on the DNA molecule called origins of replication. Here, a group of proteins called the initiator complex binds to the DNA and separates the two strands, forming a replication bubble.
Elongation: DNA polymerase, the enzyme responsible for adding nucleotides to the growing DNA strand, begins synthesizing a new strand of DNA using the template strand as a guide. The polymerase moves along the template strand in the 3' to 5' direction, adding nucleotides to the new strand in the 5' to 3' direction.
Termination: Replication continues until the polymerase reaches the end of the DNA molecule or encounters an obstacle, such as another polymerase or a damaged DNA strand. At this point, the polymerase detaches from the DNA and replication is complete.
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1
are organisms capable of transforming one
form of energy (light energy or chemical energy) into the food
they need to do work.
Check it
2 SCRATCHPAD
Improve thls question
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Answer: Yes, organisms are able to transform both light energy and chemical energy into food.
Please help my brain cannot comprehend this :p
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Answer:
its the third one
a person running 100m straight
Explanation:
idfk some sh*t we learn in physics class
which of these are part of the scifitific methood
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Which of the following is an example of a part of the cell theory?
A. Bacterial cells divide on a cell culture plate. B. Mitochondria replicate during the cell cycle.
C. A virus infects the lungs, causing a cold.
D. All organisms use the same genetic code.
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Cell theory has 3 basic points: Cells are the basic unit of all living things. The tiniest living organism that is capable of carrying out all life's duties is the cell.
What does the cell theory say?According to the unified cell theory, each living entity is made up of one or more cells, each cell is the building block of life, and new cells develop from existing cells. this idea benefited greatly by the contributions of Rudolf Virchow.
Which three key cell checkpoints are there?The G1/S checkpoint, the intra-S checkpoint, and the G2/M checkpoint are the three primary cell cycle checkpoints [60]. Cyclin-dependent kinases control how the cell cycle progresses through its many stages.
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True or False: Chromosomal mutation only involve altering nucleotides within one gene.
Answers
Answer:
true
Explanation:
Chromosomal mutations involve changes in the structure or number of chromosomes, which can affect multiple genes or even entire sets of genes. So, the given statement is False.
What are Chromosomal mutations?Changes in the shape or quantity of chromosomes in the cells of an organism are known as chromosomal mutations. These mutations can result from errors in meiosis or mitosis, exposure to radiation or certain chemicals, or other environmental conditions.
The phenotypic and fitness of an organism can be affected in a variety of ways by chromosomal alterations, which may affect multiple genes or even entire sets of genes. While some chromosomal mutations can be harmful or even lethal, others can be beneficial or neutral. The characteristics or health of an organism can sometimes be affected in more subtle ways by these types of mutations, which can also result in genetic disorders and diseases.
Therefore, the given statement is False.
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In a prairie ecosystem, which of the following populations has the most stored energy for use by other organisms?
A prairie grasses
B. prairie dogs
C. coyote
D. hawks
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Answer:
I believe the answer would be A. because grass stores the energy it gets from the sun. Therefore it'd have more stored energy for other organisms to use.
Explanation:
In prairie ecosystem, the population with the most amount of stored energy for use by other organisms would be the prairie grasses.
Prairie ecosystems are ecosystems formed from continuous interactions between some biotic and abiotic factors such as plants, animals, fire, temperature, landforms, and precipitation. These interactions lead to the ecosystem being dominated by grasses and forbs as well as animals such as prairie dogs, squirrels, pronghorn, coyotes, and many more.
Prairies grasses are the primary producers in prairie ecosystems. They fix energy directly from the sun through the process of photosynthesis.
Thus, prairie grasses, and generally, producers in any ecosystem, hold the highest amount of energy that can be used by other organisms in the food chain or web of an ecosystem.
Other organisms such as the prairie dogs, coyote, and hawks are consumers.
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Before fats can be metabolized in aerobic cellular respiration they must be converted to _____.
1)
simple sugars
2)
fatty acids and glycerol
3)
amino acids
4)
fatty acids and amino acids
Answers
Before fats can be metabolized in aerobic cellular respiration they must be converted to fatty acids and glycerol.
The correct answer is option 2) fatty acids and glycerol.
Fats are stored in adipose tissue as triglycerides, which are composed of three fatty acid molecules attached to a glycerol molecule. In order for these fats to be used as an energy source in cellular respiration, they must first be broken down into their constituent parts of fatty acids and glycerol through a process called lipolysis. The fatty acids can then undergo beta-oxidation in the mitochondria to generate ATP through aerobic respiration.
Before fats can be used for energy in aerobic cellular respiration, they need to be broken down into their components, which are fatty acids and glycerol. This process is called lipolysis. The fatty acids then undergo a process called beta-oxidation, which generates acetyl-CoA molecules that can enter the citric acid cycle (also known as the Krebs cycle or TCA cycle) for further metabolism and energy production.
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Why do plants need water, light, and carbon dioxide?
Answers
Answer;
these are used in photosynthesis altogether. light splits the water into hydrogen and oxygen. water is used to manufacture starch, soften the testa during germination, dissolve food as well. carbon dioxide is also used during photosynthesis.
in spermatogenesis the spermatogonium with _____ chromosomes, yields ____ final spermatids with _______ chromosomes by a process known as _______
Answers
In spermatogenesis, the spermatogonium with diploid chromosomes, yields four final spermatids with haploid chromosomes by a process known as meiosis.
Spermatogenesis is the process by which spermatozoa are produced in the male gonads. It occurs in the testis and results in the development of fully mature spermatozoa capable of fertilizing an ovum. Spermatogenesis is a multi-step process that begins with the mitotic division of the spermatogonium. The resulting cells, known as primary spermatocytes, undergo meiosis I to produce two secondary spermatocytes, which then undergo meiosis II to yield four haploid spermatids. During spermiogenesis, the spermatids differentiate into spermatozoa.
In spermatogenesis, the spermatogonium with diploid chromosomes yields four final spermatids with haploid chromosomes by a process known as meiosis. Meiosis is the process by which the chromosome number is reduced from diploid to haploid. During meiosis, the chromosomes duplicate and then pair up. The paired chromosomes exchange genetic material, resulting in a reshuffling of genetic information. Finally, the paired chromosomes are separated, resulting in two daughter cells with half the chromosome number of the parent cell. This process occurs twice during meiosis, resulting in four haploid daughter cells.
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Name four factors that affect population growth then explain how each factor contributes to population growth
Answers
Answer:
The four factors are birth rate, immigration, death rate, and emigration.
Birth rate and immigration add individuals to the population, increasing the size.
Death rate and emigration remove individuals to the population, decreasing the size.
(birth rate + immigration) – (death rate + emigration) = population growth
Explanation:
i got it right on Edge 2021
Which describes an old technology and a current technology that can fulfill people’s needs?
emerging technologies
overlapping technologies
obsolete technologies
coexisting technologies
Answers
Answer:
coexisting
Explanation:
Answer:
Coexisting
Explanation:
In which of the following organizations was the United States NEVER a member or contributor?
Answers
Answer:
I got no idea
Explanation:
Answer:
the answer is b or league of nation
Explanation:
brainly plz
In what type of cell does the cell wall take place of the membrane?
a. plant cells
b. fungi cells
c. cell walls never take place of cell membranes
Answers
Answer:
A: Plant Cells
Explanation:
the cell membrane is found in all living species, including plants.
when are cells triggered to go through mitosis
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Answer:
So far, we have discussed the phases of the cell cycle and the controls that regulate the passage of the cell from one phase to the other. Once the cell has successfully completed S-phase, when its chromosomes are duplicated, and passed through G2, it is ready to enter M-phase, when mitosis occurs.
What is a possible reason people would choose to live near volcano even with the possibility of volcanic eruption?
A. Volcanic eruptions are serious when they occur.
B. Volcanic eruptions occur every few year.
C. Volcanoes are very rare.
D. Volcanic areas have good soil.
Answers
Answer:
well they live next to them because of geothermal energy can be harnessed by using the steam from underground which has been heated by earth's magma
Explanation:
its used to produce electristy for domestic and industrial use ...hoped this help narrow.
WILL GIVE BRAINLYEST
1. The graph below shows a students walk after school. Use the graph to descrito their walk. Make sure to indate the direction they are waking and the speed scordant, they are credits
in speed, or decreasing in speed. 3 points)
HINT: Think about this student's motion in three steps
A Students After School Walke
2
HURRRYYYYYYY IDK-
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Answer:
J'aiderais, mais s'il y avait plus d'informations, je les comprendrais mieux pour moi et pour les autres utilisateurs également.
Explanation:
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8. All seeds hove seed or fruit to protect them as they grow. How do seeds grow? 9. The of a plant begins with a seed. 10. The way plants grow, five, and is called their life cycle. 11. Most seeds need water, food, and a little heat to become new plants. 12. A new plant has the same life cycle as its plant. Critical Thinking 13. How ore new plants that grow from seeds like their parent plonts?
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Seeds grow with the help of various natural resources like water, oxygen, and sunlight, which help them to sprout and grow roots and develop into new plants. Some seeds grow as soon as they land in the ground, while others need a specific time period to grow.
The life of a plant begins with a seed that contains the necessary resources required for the plant's growth, which includes the embryo, endosperm, and protective seed coat.
The process through which plants grow, reproduce, and die is called their life cycle. It includes different stages like germination, growth, flowering, pollination, fertilization, seed production, and dispersal.
Seeds need water, food, and a little heat to grow into new plants. Water helps seeds to soften and expand, and food helps them to provide the necessary nutrients required for growth. The heat helps seeds to break dormancy and activate enzymes that speed up the germination process.
A new plant has the same life cycle as its parent plant. Plants have a unique life cycle, and every stage of the life cycle is essential for their growth and development. New plants inherit their genetic traits from their parent plants, and their life cycle is the same as that of their parent plant.
New plants that grow from seeds inherit their genetic traits from their parent plants and have the same life cycle as their parent plants. The life cycle of a plant includes the stages of germination, growth, flowering, pollination, fertilization, seed production, and dispersal. Thus, new plants that grow from seeds are like their parent plants.
My father was crying it was the first time I saw him cry I had never thought it possible
Answers
Answer:
Yeaaaa well for me it's my step-dad because my dad died but i heard my step-dad cry with my mom they have separation depression and my mom had to take a flight with me somewhere but ya long story but i it made short- have a good day-! :D
Explanation:
5. Asteroids and comets are both objects that orbit the sun.
A. What is one similarity between asteroids and comets?
Answers
Answer:
They both have unusual orbits.
Explanation:
Hope this helps
About how many genes were involved in producing the dramatic differences between teosinte and modern corn? a. 1 b. 5 c. 10 d. 15
Answers
About 5 genes were involved in producing the dramatic differences between teosinte and modern corn. Option B is correct.
The process of domestication in plants and animals involves genetic changes that lead to the emergence of new and desirable traits. In the case of corn, the wild ancestor teosinte underwent significant changes during domestication to become the highly productive modern crop we have today. Research has shown that only a few genes were responsible for the major differences between teosinte and modern corn.
A study published in the journal Nature in 2012 identified five genes that played a crucial role in the transformation of teosinte to modern corn. These genes were involved in controlling the size and shape of the corn ear, the number and arrangement of kernels on the ear, and the timing of flowering. By selectively breeding plants with desirable traits, early farmers were able to create corn varieties that were more productive and better suited to their needs.
While the changes in these five genes were key to the transformation of teosinte to modern corn, it is important to note that many other genes also contribute to the overall characteristics of corn. Nevertheless, the discovery of these five key genes has provided important insights into the process of plant domestication and the genetic basis of important crop traits. Option B is correct.
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Please help i am give brainilest
Which of the following characteristics is shared by viruses and living cells? Both viruses and living cells –
A. have a nucleus, as well as a cell wall.
B. contain nucleic acids such as DNA or RNA.
C. can replicate independently of a host cell.
D. use organelles to perform life functions.
i don't want to see any link
If i do you will be reported
Answers
Answer:
B
Explanation:
answer these questions ill give you a Brainliest
1. What is matter made of?
2. Define matter.
3. Give 3 examples of things that are made of matter.
4. What is the difference between solid, liquid, and gas?
5. What is a chemical reaction?
6. Explain the difference between the reactants and products.
7. Do you have any plans for Halloween and the break?
Answers
2. a substance that takes up mass and volume
3. water, food, plants
4. Solid- maintains a fixed volume and shape
Liquid- takes the shape of it’s container (no fixed volume or shape)
Gas- expands to occupy a space
5-A chemical reaction rearranges atoms to create different substances as products
6- Reactants present at the start of the reaction, Products are present at the end