after meiosis i, what is the ploidy of each daughter cell? what is the replication state of the chromosomes in each cell? (replicated or unreplicated)
Answers
The initial cell division of meiosis , known as meiosis I, divides the chromosomes into two cells. After this division, each cell receives a ploidy number of 2N.
What is the meiotic ploidy?After meiosis II, there is no decrease in ploidy since both parent and daughter cells only have one copy of each meiosis. Each cell after mitosis has a chromatid for every homologous chromosome. Thus, each cell has enough DNA to make two copies of each chromosome.
Reductional division also occurs during the first meiotic stage, when a diploid parent cell divides into haploid daughter cells, resulting in a shift in ploidy. Meiosis II does not include a change in ploidy because it is an equational division.
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Related Questions
Some antibiotics are no longer effective in killing pathogens. Use your knowledge of natural selection to explain why.
Answers
Antibiotic resistance in pathogens occurs due to natural selection, where bacteria with genetic variations that make them less susceptible to antibiotics survive and reproduce, leading to the ineffectiveness of the drugs.
Antibiotic resistance, where pathogens become resistant to the effects of antibiotics, is a consequence of natural selection. When antibiotics are used to kill bacteria, some bacteria may possess genetic variations that make them less susceptible to the drug's effects. These resistant bacteria have a survival advantage and can survive and reproduce while susceptible bacteria are eliminated. Over time, the resistant bacteria proliferate and become dominant in the population, leading to the ineffectiveness of the antibiotic. This is because the selection pressure of the antibiotic favors the survival and reproduction of the resistant bacteria, driving the evolution of antibiotic-resistant strains. The misuse and overuse of antibiotics further accelerate this process, highlighting the importance of responsible antibiotic use to preserve their effectiveness in combating pathogens.In conclusion, the ineffectiveness of some antibiotics in killing pathogens is attributed to the process of natural selection, whereby bacteria with genetic variations that confer resistance to the antibiotics survive and reproduce, leading to the prevalence of antibiotic-resistant strains.
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What is reproductive isolation?Why is it necessary for speciation to occur? Explain one way reproductive isolation might occur.
Answers
Reproductive isolation is a process in which individuals in a population are prevented from reproducing. This isolation can occur in several ways, such as a physical barrier that separated these species into two groups that will reproduce with each other and generate a new species.
Why is it necessary for speciation to occur?Speciation is an essential evolutionary process for the creation of new species. It is worth remembering that from reproductive isolation, the individuals of a population have been differentiating and evolving and in the end, there will be a different species from the initial one. Therefore, speciation is necessary for the emergence of new species.
Explain one way reproductive isolation might occur.Reproductive isolation may occur due to a geographic barrier. In this case, a population is separated by a geographic barrier such as a river, a canyon, or a mountain, thus generating subpopulations that will begin to evolve and adapt in different ways. In the end, we will have different subpopulations, but in the beginning, they were part of the same population.
why doesn’t the thermosphere feel warm even though many of the sun’s ultraviolet rays are present?
Answers
Which of the following is NOT a hypothesis for why organisms undergo senescence? 1Rate-of-living hypothesis 2Mutation accumulation hypothesis 3 Molecular clock hypothesis 4Antagonistic pleiotropy hypothesis
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The Molecular clock hypothesis is NOT a hypothesis for why organisms undergo senescence. The correct option is 3.
The Molecular clock hypothesis is actually a hypothesis related to the accumulation of genetic changes over time, but it is not specifically focused on explaining why organisms undergo senescence.
The Molecular clock hypothesis suggests that genetic mutations and changes occur at a relatively constant rate in organisms' DNA sequences over time. These changes can be measured and compared across different species to estimate their evolutionary divergence or the time since they shared a common ancestor. The hypothesis assumes that this molecular clock ticks at a constant rate, serving as a measure of time.
While the Molecular clock hypothesis is relevant to understanding the genetic changes that occur during aging and evolution, it does not directly address the underlying causes or mechanisms of senescence in organisms. Senescence is a complex biological process involving various factors, such as genetic, cellular, and environmental influences. Several other hypotheses, such as the Rate-of-living hypothesis, Mutation accumulation hypothesis, and Antagonistic pleiotropy hypothesis, specifically focus on explaining senescence and the reasons why organisms undergo aging and deterioration over time.
Therefore the correct option is 3.
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why is commensalism called commensalism
Answers
Answer: Commensalism’s literal translation from Latin is “to eat at the same table”, is a formality of symbiosis(relationship btwn 2 organisms).
Explanation:
the receptionist said to the manager,'I have booked your flight tickects for Monday'. change into imdirect speech
Answers
Answer:
The correct answer is- The receptionist told the manager that he had booked his flight tickets for Monday
Explanation:
Indirect speech is the expression any statement of a consverstaion that occured in past without quoting explicitly. Indirect speech is the stating any quoted statement in simple statement. In this type of speech some grammer and certain noun and pronoun change accordingly.
So the correct indirect speech of the receptionist said to the manager,'I have booked your flight tickects for Monday'. would be The receptionist told the manager that he had booked his flight tickets for Monday
The heart is a muscular pump with two main functions: receive deoxygenated blood from the systemic circuit and then pump it to the lungs to get rid of the CO, and pick up oxygen. Theo be pumped out through the arterial system. Study how blood moves into and out of the heart. View Available Hint(s) Reset Help Bicuspid valve Pulmonary veins Pulmonary semilunar valve Lung capillaries Tricuspid valve Pulmonary arteries Left ventricle Aortic semilunar valve Right ventricle Pulmonary trunk Left atrium Right atrium Aorta The correct ranking cannot be determined.
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Blood moves into and out of the heart through a series of valves and vessels. The exact ranking of these structures cannot be determined based on the given information.
The movement of blood into and out of the heart involves a coordinated series of events. Deoxygenated blood returns to the heart from the systemic circuit through the superior and inferior vena cava, entering the right atrium. From the right atrium, blood flows through the tricuspid valve into the right ventricle. The right ventricle then contracts, pumping the blood through the pulmonary semilunar valve into the pulmonary trunk, which splits into the left and right pulmonary arteries.
The pulmonary arteries carry deoxygenated blood to the lungs, where it exchanges carbon dioxide for oxygen in the lung capillaries. Oxygenated blood from the lungs returns to the heart through the pulmonary veins, entering the left atrium. From the left atrium, blood flows through the bicuspid (mitral) valve into the left ventricle. The left ventricle contracts, pumping the oxygenated blood through the aortic semilunar valve into the aorta, which is the main artery of the systemic circuit.
The blood then branches out through the arterial system to supply oxygen and nutrients to the body's tissues. The exact ranking of the structures (valves and vessels) involved in this blood flow cannot be determined based on the given information.
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Why has it been difficult for scientists to edit specific genes?
Answers
No matter the research, essential genes are crucial for organism to survive. Altering genetic sequence in any way can lead to lethality, therefore, making it essential genes difficult to edit.
Why is it difficult for scientists to edit specific genes?There are many reasons why it has been difficult for scientists to edit specific genes:
Human genome is extremely complex, making it challenging to target specific gene for editing.
Traditional gene editing methods such as restriction enzymes and insertion/deletion can cause unintended mutations in genome.
Gene editing methods that use viral vectors can trigger immune response, which make it difficult to achieve stable and long-lasting gene editing.
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Which is a function of the lymphatic system?
regulating hormones
maintaining body temperature
maintaining fluid balance
distributing oxygen
Answers
Explanation:
Which is a function of the lymphatic system?
Maintaining fluid balance...
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which of the following cell types would have full complementary number of chromosomes?
a. haploid cell
b.somatic cell
c.gamete
d. sperm
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What is the principal enzyme involved in dna replication.
Answers
Answer:
DNA polymerase
Explanation: :)
The enzyme joins nucleotides to synthesize a new two strand of DNA. DNA replication is called proofreads because each new DNA molecule is made up.
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What is common to all minerals?
Group of answer choices
They are soft.
They are solid.
They are living.
They are man-made.
Answers
rocks aren’t soft
rocks aren’t alive
they were dug from the ground not man-made.
Fredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. Which of the following groups of items should she bring?
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The group of items that Fredrika should bring from her backyard ecosystem which would be abiotic factors should be a smooth rock, some red dirt, and an empty bird's nest. Option B.
What are the abiotic factors of ecosystems?The abiotic factors of an ecosystem refer to the non-living factors of the ecosystem. The non-living factors of the ecosystem include:
Edaphic factors or soil factorsClimatic factors such as temperature, pressure, precipitationTopographic factorsIn other words, the non-living factors of the ecosystem include all factors of the ecosystem apart from the plants, animals, and microbes in the ecosystem.
Plants, animals, and microbes are otherwise known as the biotic or living factors of the ecosystem. Thus, a combination of smooth rock, some red dirt, and an empty bird's nest represent a non-living factor of the ecosystem.
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Fredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. Which of the following groups of items should she bring?
A. a lightning bug, a plug of grass, and a worm
B. a smooth rock, some red dirt, and an empty bird's nest
C. a ladybug, a spider, and some water from a mud puddle
D. a caterpillar, a pine cone, and a piece of a robin's egg
Plant cells and bacteria both have cell walls. Many antibiotics work by breaking down the proteins that make up the cell wall, so bacteria become vulnerable to the human body's immune system.
Which statement explains why antibiotics do not break down cell walls in plants?
Responses
Plant cells are less complex than bacterial cells, and their cell walls are made of enzymes which prevent the antibiotic from breaking down the plant cell walls.
Plant cells are less complex than bacterial cells, and their cell walls are made of enzymes which prevent the antibiotic from breaking down the plant cell walls.
Plant cells are prokaryotic, and their cell walls are made of lipids which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are prokaryotic, and their cell walls are made of lipids which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are simple cells, and their cell walls are made of carbohydrates which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are simple cells, and their cell walls are made of carbohydrates which prevent the antibiotics from breaking down the plant cell walls.
Plant cells are eukaryotic, and their cell walls are made of different proteins which prevent the antibiotics from breaking down the plant cell walls.
Answers
Antibiotics do not break down cell walls in plants because: Plant cells are eukaryotic, and their cell walls are made of different proteins which prevent the antibiotics from breaking down the plant cell walls. The last option is the correct answer.
What is Antibiotics?This is a type of substance that fight against bacteria. It is a very vital type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or stop the growth of bacteria.
cell walls a rigid, external layer that is specifically designed to give structural support and rigidity. It also keeps the interior components of the cell firm and safe from the external environment.
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What are silver carp strengths and weaknesses?
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You have cut the DNA of a circular double-stranded viral genome with a restriction endonuclease and electrophoresed the products on an agarose gel. You observe only one (1) band on the gel. The size of the band on the gel is equivalent to the size of the viral genome. This is because
restriction endonucleases do not cut RNA and this virus has an RNA genome
there is only one restriction site for this enzyme in the viral genome
the introns contain the recognition sites and have already been spliced out
all of restriction fragments are too small to detect
Answers
The reason why you observe only one (1) band on the gel, with a size equivalent to the size of the viral genome, is that there is only one restriction site for this enzyme in the viral genome. Therefore, the correct answer is B.
Restriction endonucleases are enzymes that recognize and cut DNA at specific sequences, known as restriction sites. If there is only one restriction site in the viral genome, the enzyme will make only one cut, resulting in a single fragment of the same size as the original genome. This single fragment will appear as one band on the agarose gel.
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Choose the best description of the cell cytoskeleton.
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Answer:
The cell cytoskeleton is a dynamic network of fibers that can be quickly dismantled and reassembled to change cell shape and the position of cell components,The fundamental functions of the cytoskeleton are involved in modulating the shape of the cell, providing mechanical strength and integrity, enabling the movement of cells and facilitating the intracellular transport of supramolecular structures, vesicles and even organelles.
Explanation:
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The USA ha about 100 million houehold. Aume each houehold recycled 500 g of aluminum per month,
Step 1. How much aluminum overall (all of the USA) would be aved per year ?
Step 2. Convert your anwer into metric tonne (1 tonne= 1,000 kg= 1 x 106 g)
Ue only exponential notation and how your calculation
Answers
According to the research, "the current 2021 U.S. plastic recycling rate is anticipated to be between 5% and 6%. A recycling rate of 32. 1% was achieved with respect to the 94 million tonnes of MSW that were recycled and composted.
The true rate of plastic recycling in the United States may even be lower when additional losses that aren't monitored are taken into account, such as plastic waste that is collected for 'recycling' but is actually burned. Municipal solid waste (MSW) recycling rate is defined in proposed Section 11505(4) as "the quantity of MSW recycled and composted divided by the total amount of MSW recycled, composted, landfilled, or incinerated. The recycling rate excludes material that is reused, avoided, or used to generate energy.
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Cladograms are scientific hypotheses that can be overturned by new data. True False Angiosperm plants did not appear until after the extinction of the dinosaurs. True False The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". True False In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. True False The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". True False An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. True False
Answers
An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. This statement is false. An ichnofossil is a trace fossil, which is any indirect evidence of past life, such as tracks, burrows, and feces. It is not part of the hard skeleton left behind by a vertebrate.
Cladograms are scientific hypotheses that can be overturned by new data. This statement is true. Cladograms are diagrams that show the evolutionary relationship between organisms based on various traits. New data can cause changes to be made to cladograms which can result in a change to the interpretation of the evolutionary history of organisms.
Angiosperm plants did not appear until after the extinction of the dinosaurs. This statement is false. Angiosperms, also known as flowering plants, appeared in the fossil record at least 140 million years ago. Although the dinosaurs went extinct around 66 million years ago, angiosperms were already widespread and diversifying by that time.
The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". This statement is true. Analogous characters are traits that have evolved independently in different groups of organisms due to similar environmental pressures and not due to a shared ancestor.
In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. This statement is true. Non-genetic changes that occur during an organism's life span are not heritable and cannot be passed on to the next generation. Only genetic changes that occur in the germ cells, such as mutations, can be passed on to the offspring.
The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". This statement is false. A monophyletic group is a group of organisms that has a single ancestor and contains all of the descendants of this unique ancestor. This group is also called a clade.
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EMERGENCY!!!!! Pregnant female bears do not go into deep hibernation in the winter like other bears. why might this be a physiological adaptation for mother bears?
a. the pregnant bear's metabolic rate would rise too high, and the fat stores would be gone quickly
b. the fat stores that bears building up in the summer and fall would be wasted on a pregnant bear
c. pregnant bears need to maintain a higher metabolism that nonpregnant bears
d. pregnant bears are unable to build up fat stores during the summer and fall moths.
Answers
Answer:
c. pregnant bears need to maintain a higher metabolism that nonpregnant bears
Explanation:
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who adapts, the population or individual
Answers
Answer:
to be honest i think the answer is the population
Explanation:
Answer:
Populations evolve through a process known as natural selection which allows individuals with beneficial traits for survival to breeding with other individuals who share those traits, eventually leading to offspring who only exhibit those superior traits.
Explanation:
which statement describes stability in the data?
Answers
The statement that describes the stability of the nuclei of potassium atoms is:
3) some potassium atoms have unstable nuclei that spontaneously decayWhat brings about the stability of the nuclei of potassium atoms?The stability of the nuclei of potassium atoms is due to the balance in the ratio between the neutrons and protons in the nuclei of the potassium atom.
For the nuclei of atoms to be stable, the ratio between the protons and the neutrons must be less than 1.5. When the ratio is greater, the nucleus spontaneously decays until it becomes stable.
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Complete question:
Which statement describes the stability of the nuclei of potassium atoms?
1) All potassium atoms have stable nuclei that spontaneously decay.
2) All potassium atoms have unstable nuclei that do not spontaneously decay.
3) Some potassium atoms have unstable nuclei that spontaneous decay.
4) Some potassium atoms have unstable nuclei that do not spontaneously decay
EXPLANATION: potassium has many isotopes, of which, most but not all are stable, being non-radioactive. From table N, it shows two different radioisotopes of potassium ³⁷K and ⁴² K. In all radioactive atoms, the nucleus is unstable and emits particles and/or energy as it disintegrates to a more stable state
Which organelle is responsible for transporting lipids in the cell? (1 point) O Golgi apparatus O rough ER O nucleus O mitochondrion
Answers
Answer:
Endoplasmic Reticulum (ER)
Explanation:
The organelle that is responsible for transporting lipids in the cell is Golgi apparatus. The correct option is A.
What is Golgi apparatus?A Golgi body, also renowned as a Golgi apparatus, is a cell organelle that aids in the processing along with packaging of proteins as well as lipid molecules, mainly proteins destined for cell export.
The Golgi body is a series of stacked membranes which is basically named after, Camillo Golgi the one who discovered it.
The Golgi apparatus transports, modifies, along with packaging proteins as well as lipids into vesicles for delivery to specific destinations.
The Golgi apparatus is a crucial organelle for cargo post-translational modification.
Golgi-resident enzymes including glycosyltransferases, glycosidases, and kinases mediate post-translational modification of secreted and membrane proteins.
Thus, the correct option is A.
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how would expect venous pressures to compare to arterial pressure? why?
Answers
Venous pressures are generally lower than arterial pressures due to the differences in their respective functions and the resistance offered by arterial walls.
Venous pressures are expected to be lower than arterial pressures. Arterial pressure refers to the force exerted by the blood against the walls of arteries, generated by the pumping action of the heart during systole.
Arteries are responsible for transporting oxygenated blood away from the heart to tissues throughout the body.
The arterial system experiences higher pressure due to the pumping action of the heart, the elastic properties of arterial walls, and the need to maintain blood flow against resistance.
In contrast, venous pressure refers to the force exerted by the blood in the veins. Veins carry deoxygenated blood back to the heart.
The veins are thinner-walled and less elastic compared to arteries, which means they have less ability to withstand and maintain high pressures.
Moreover, venous return is aided by various mechanisms, such as the contraction of surrounding muscles, the presence of one-way valves, and the respiratory pump (breathing movements).
These mechanisms assist in propelling blood towards the heart and overcoming the resistance in the venous system, resulting in lower venous pressures compared to arterial pressures.
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If a diploid cell has 10 chromosomes (2n = 10) in g1 phase, how many pairs of sister chromatids will be present in the 'prophase' nucleus of these cells?.
Answers
Answer: 20
Explanation:
What effect does deforestation have on the environment?
A increased oxygen in the atmosphere
B increased carbon dioxide in the atmosphere
c decreased oxygen in the geosphere
D decreased carbon dioxide in the atmosphere
Answers
Answer: its definitely B or C i think that it might be C
Explanation:
As more trees are removed there is less trees to remove the Carbon Dioxide from our atmosphere.
This means that there are less trees producing Oxygen which almost all living organisms need to survive which will decrease the amount of Oxygen in The Geosphere
The Geosphere is any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere.
how many blood smears are required for a differential white blood cell count?
Answers
In order to count differential white blood cells, only one blood smear is required.
What is a differential white blood cell count? A differential white blood cell count, also known as a "diff," measures the number of each type of white blood cell in your blood. A diff assists in determining if there is an infection or inflammatory condition in your body, as well as providing insight into other medical concerns.
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amoeba sisters video recap food chains food webs and an introduction to biodiversity for
Answers
The Amoeba Sisters video recap on food chains and food webs is a great resource to understand the interconnections between different organisms in an ecosystem. A food chain is a linear sequence of organisms where each one is consumed by the next, while a food web is a more complex network of interconnected food chains.
The concept of biodiversity is also introduced in the video, which refers to the variety of living organisms in an ecosystem. Biodiversity is important for maintaining a healthy and balanced ecosystem, as each organism plays a vital role in maintaining the overall functioning of the ecosystem.
Understanding food chains, food webs, and biodiversity is crucial for understanding how ecosystems work and how human activities can impact them. By learning about these concepts, we can make informed decisions about how to protect and preserve the natural world around us.
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The part of the atom that carries a negative charge is the ____ and the part that carries a positive charge is the ____
neutron; proton
proton; neutron
neutron; electron
electron; proton
Answers
Answer:
D) The part of the atom that carries a negative charge is the electron and the part that carries a positive charge is the proton
Explanation:
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Answer: Neutron; Proton
Explanation: Neutrons are Negative, Protons are Positive and Electrons are neutral.
what negative impacts do wildfires have on ecosystems, and what can be done to fix this problem?
Answers
fires in the ecosystem have only negative impacts.Because the gases released by their fumes have a harmful content.So the reduction, the over-care of people wanted to change everything.