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What process ensures that the normal number of chromosomes is restored after each cell division? During what part of the cell cycle does this occur?
Answers
Answer:reproduction
Explanation: when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring. Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
Related Questions
Identify the organelle *
1 point
Outer membrane
Inner membrane
Crista
Matrix
DNA
ma
O Ribosome
O Mitochondria
Ο Ο Ο Ο
Nucleus
O Chloroplast
Answers
Explanation:
Mitochondria
hope it helps u
What cell has a cell wall, cell membrane, and mitochondria
1. Eukaryotic
2. Prokaryotic
3. Bacteria
4. An Animal cell
Answers
Cell wall, cell membrane and mitochondria are all found in a eukaryotic cell. The correct answer is option 1.
Large and complex organisms are made up of eukaryotic cells, which have a nucleus enclosed within the nuclear membrane. Eukaryotic cells are found in fungi, plants, animals, and protozoa.
The cell wall comprises cellulose, hemicellulose, proteins and pectin. Function of the cell wall is to maintain the shape of the cell and helps in interacting with other cell.
The cell membrane or the plasma membrane works as a check post for the material entering and exiting the cells. While the mitochondria processes the energy unit.
Therefore, a eukaryotic cell posses a cell wall, plasma membrane and mitochondria. The correct answer is option 1.
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Question
Which statement describes the relationship between a gene and an allele?
Responses
A gene can take different forms called alleles.
A gene can take different forms called , alleles, .
Many genes put together are called an allele.
Many genes put together are called an , allele, .
Alleles are similar genes from different species of organisms.
Alleles are similar genes from different species of organisms.
A gene is made of small parts called alleles.
, , A gene is made of small parts called alleles .,
Answers
Answer:
A gene can take different forms called alleles.
Explanation:
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. For example, the gene for eye color has several variations (alleles) such as an allele for blue eye color or an allele for brown eyes.
Place the steps in order below using the terms first, second, third, and so on.
Some viral DNA is incorporated into the bacterium's genome as a spacer.
Bacteria is exposed to phage (virus) for the first time and survives.
Cas-9 removes the targeted sequence of cutting it out of the bacterial genome.
The RNA acts as a guide for the protein
Cas-9 finds an exact DNA sequence match
in an invading virus.
Transcription occurs and RNA is made
from DNA.
Answers
CRISPR-Cas9 is a revolutionary gene editing technique that has enabled scientists to make precise changes to an organism’s DNA.
Bacteria is exposed to phage (virus)First, bacteria is exposed to phage (virus) for the first time and survives. Second, transcription occurs and RNA is made from DNA.Third, the RNA acts as a guide for the protein Cas-9. Fourth, Cas-9 finds an exact DNA sequence match in an invading virus.Fifth, Cas-9 removes the targeted sequence of cutting it out of the bacterial genome.Finally, some viral DNA is incorporated into the bacterium's genome as a spacer.The process begins when bacteria is exposed to phage (a virus) for the first time and survives.This triggers the production of RNA from the DNA which acts as a guide for the protein Cas-9.Cas-9 then searches for an exact match in the invading virus and when found, cuts out the targeted sequence from the bacterial genome.The viral DNA is then incorporated into the bacterium’s genome as a spacer.This process is highly precise and efficient, and is being used to explore the potential of gene editing in many fields.To learn more about Bacteria is exposed to phage (virus) refer to:
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Laboratory instruments are sterilized prior to reuse by __________.
Answers
Laboratory instruments are sterilized prior to reuse by autoclaving (steam autoclave).
An autoclave is a device used in industrial and scientific procedures that call for higher temperature and pressure in comparison to ambient temperature. Before surgery, autoclaves are used to sterilize the area. In the chemical sector, autoclaves are used to vulcanize rubber, cure coatings, and perform hydrothermal synthesis.
Industrial autoclaves are employed in a variety of industrial settings, particularly in the production of composite materials. Sterilization autoclaves are frequently employed in the fields of microbiology and mycology, medicine and the manufacture of prostheses, tattooing and body piercing, and burial rituals.
They are frequently referred to as retorts in the chemical and food sectors and vary in size and function based on the medium to be sterilized.
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what is the primary pigment that makes leaves green in land plants?
Answers
hope this helps!!
Chlorophyll is the primary pigment that makes leaves green in land plants, by absorbing red and blue light.
What is chlorophyll?It is a pigment present in the plant leaves, through which plant leaves apers green in observation, it plays several roles in the plants other than the green appearance of the leaves.
During photosynthesis, this chlorophyll pigment is responsible to form reaction center through which light is absorbed and leads to a process through which light converts into chemical energy for the synthesis of food.
It is present in the chloroplast, which is the site of photosynthesis, and provides the necessary components for plant food synthesis.
Therefore, the primary pigment that makes leaves green in land plants is known as chlorophyll.
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Heart disease is the leading cause of death among both men and women in the United States.
It is usually caused when a sticky substance called plaque builds up in the arteries. Often, the
only symptoms of heart disease are chest pain or discomfort.
Why do you think heart disease is so prevalent in the United States? How could heart
disease affect other
organ systems?
Answers
Heart Diseases prevalent in the United States due to the leading causes of High blood pressure, a High Cholesterol level, diabetes, Overweight and obese, Alcohol overuse are the key factors.
Heart disease could affect other organs as if the heart is weak, blood could not be circulated and pumped properly thus fluid will start filling in kidneys, lungs, stomach, etc. cause swelling in ankles in feet or legs.
Coronary heart disease is most common cause of death, data suggests that over 20.1 million adults age 20 and older have CAD. CAD can occur when arteries that supply blood and oxygen to heart becomes clogged due to fatty materials called plague. Such factors results sudden Cardiac arrest.
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Where on a DNA strand does replication begin?
on the closed end of the DNA strand
on both ends of the DNA strand
on the middle of the DNA strand
on one end of the open part of the DNA strand
Answers
The DNA replication begins at both the ends which are close to the replication fork. Replication fork is the site where the unwinding of DNA begins. Thus, the correct option is B.
What is DNA replication?DNA replication is the biological process of producing two new identical replicas of the DNA molecule from one original parent DNA molecule. DNA replication occurs in all types of living organisms which are acting as the most essential part for the biological inheritance.
DNA replication initiates at the specific points called as origins, where the structure of DNA double helix is unwound. A short segment of the RNA molecule, called as a primer, is then synthesized and acts as the starting point for the new DNA synthesis. An enzyme called as DNA polymerase then begins replicating the DNA molecule by matching bases to the original strand.
Therefore, the correct option is B.
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Answer: on one end of the open part of the DNA strand.
Explanation: i put b like the person above me said the answer was and it was wrong !
The presence of organic material in soil makes it more productive for plant growth.
Please select the best answer from the choices provided
T
F
Answers
Answer:
True
Explanation:
Organic matter in the soil is called "humus". It is formed by the decomposition of plant material by microorganisms.
It is extremely important for retaining water and nutrients in the soil, both of which are crucial for plant growth and survival. Therefore, organic matter in the soil makes the soil much more "productive."
DNA replication is considered semiconservative because
Answer choices
after many rounds of DNA replication, the original DNA double helix is still intact.
each daughter DNA molecule consists of two new strands copied from the parent DNA molecule.
each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand.
new DNA strands must be copied from a DNA template.
Answers
DNA replication is considered semiconservative because "each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand" is the correct answer.
DNA replication is the process of copying DNA to create a new strand of DNA. During DNA replication, the DNA double helix unwinds and separates into two separate strands. Each of these strands serves as a template for the new strand of DNA. A new strand of DNA is built by matching up complementary nucleotides, the building blocks of DNA.
Once the new strand is complete, two identical DNA molecules have been created. Each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand.
This was first proposed by Watson and Crick in 1953. DNA replication is an essential process for the growth and repair of cells. Without DNA replication, cells would not be able to divide and grow.
Additionally, DNA replication plays a critical role in maintaining the integrity of the genetic material. Errors during DNA replication can lead to mutations that can cause diseases like cancer.
Therefore, DNA replication is considered semiconservative because of the two different types of strands in the newly synthesized DNA.
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Which statement best explains why multicellular organisms have specialized cells?
O They must undergo cellular respiration to get energy needed to move and grow.
O They must replace dead cells with new ones.
O They must undergo photosynthesis to obtain energy needed for cellular respiration.
O They are made of cells that form tissues and organs that perform specialized functions.
Answers
Answer:
I think your answer would be D.
Explanation:
The tissues are not specialized. The organelles do not cooperate in order to perform the functions of living things. The majority of its cells do not come into contact with the outside world.
Multicellular organisms means the the organisms composed of more than one cells. These cells will differentiate to perform specialized functions.
Why multicellular organisms have specialized cells?According to level of organization, cell combine to form tissue, tissue group together to form organs, organs combine to form organ system and organ system work in coordination to form organism.
In multicellular organisms, each group of cells perform specialized functions.
Thus, option D is correct, i.e., they are made of cells that form tissues and organs that perform specialized function.
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Which would be the order of the bases on the opposite strand of dna
Answers
Explanation:
if one side is A the other would be T
if one side is G the other would be C
A-T
G-C
in a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of: group of answer choices conservation. expression. translation.
Answers
In a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of selection.
Mutations are a change in the DNA sequence in a living being. It can result from various things, such as exposure to mutagens, viral infection, or errors in DNA replication during the cell division process. Random mutation plays a really important part in the theory of evolution by natural selection. In that theory, mutations give rise to adaptation that is passed on to offspring, which changing their chances of survival. Organisms that had harmful random mutation would me killed, therefore not able to create offsprings and eventually eliminated from nature.
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Draw a well labelled diagram of the lateral view of human brain
With a well labelled diagram show all the Parts of the lateral view of human Ear
Answers
Answer:
Here you go
You can thank me later
Explanation:
PLS RATE AS BRAINLIEST ANSWER
From the information on linkage, chromosomal mapping, and many associated phenomena, what answers would you propose to the following fundamental questions?
Part A
How was it established experimentally that the frequency of recombination (crossing over) between two genes is related to the distance between them along the chromosome?
Answers
Crossing over is the exchange of chromosome segments between non-sister chromatids during meiosis. This process is one of the mechanisms responsible for genetic diversity and also serves as the basis for genetic mapping. Genetic mapping is used to determine the position of genes on a chromosome.
To establish experimentally that the frequency of recombination between two genes is related to the distance between them along the chromosome, the following steps must be followed: The frequency of recombinants is determined by cross-breeding parent organisms with different traits. Determining the distance between the two genes is the next step in the process. This is accomplished by observing the percentage of recombinant progeny that result from a particular cross. The distance between the genes is proportional to the frequency of recombinant progeny. Crossing over occurs more frequently between genes that are far apart on the chromosome than those that are close together. As a result, genes that are close together are less likely to cross over and produce recombinant offspring.
To determine the distance between genes on the chromosome, a mapping function is used. By analyzing the frequency of recombinant progeny resulting from different crosses, the distance between the genes can be calculated. This distance is proportional to the frequency of recombinants.
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Deep-sea hydrothermal vent communities a. get their energy from photosynthesis in the photic zone near the surface. b. use bioluminescence to generate food. c. are built on the energy produced by the activity of chemoautotrophs that oxidize sulfur. d. contain only bacteria and other microorganisms.
Answers
Deep-sea hydrothermal vent communities get their energy from the energy produced by the activity of chemoautotrophs that oxidize sulfur.
A hydrothermal vent is a fissure in the Earth's surface from which geothermally heated water gushes forth. Hydrothermal vents are frequently found near volcanically active places, undersea ridges, and areas where tectonic plates are moving apart at a rapid pace. Hydrothermal activity is associated with a variety of mineral deposits, and these vents are a significant habitat for various biological species that have adapted to harsh conditions that are unusual for their regular habitat.Scientists have discovered deep-sea hydrothermal vents around the globe, from the Atlantic to the Pacific Oceans. There are communities of life-forms that thrive in these unlikely places. Hydrothermal vents are home to several strange organisms that have adapted to survive in the scorching waters surrounding them. The intense heat and lack of light suggest that hydrothermal vent communities get their energy from the energy produced by the activity of chemoautotrophs that oxidize sulfur, which is the correct answer from the options given above. They exist in a symbiotic relationship with bacteria that live inside them and turn inorganic compounds into organic compounds. These species are found nowhere else on the planet, and they have piqued the interest of scientists. They are studying these areas, trying to learn more about these unusual organisms and how they survive. The hydrothermal vents offer a valuable new perspective on the world's living organisms and their habitats. In conclusion, deep-sea hydrothermal vent communities are built on the energy produced by the activity of chemoautotrophs that oxidize sulfur.
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which of the following organisms are able to take energy from the sun and make it usable for living things?
A. consumers
B. decomposers
C. omnivores
D. producers
Answers
Which of the following soil amendments is associated with dependency resulting from extended use?
humus
NPK fertilizer
manure composts
plant compost
Answers
Answer: its NPK fertilizer
Explanation:
Did the assignment on
Which best describes the process of peer review?
A. Scientists allow other people to draw the conclusions from their
work.
B. Scientists allow other people to choose their control groups.
C. Scientists examine each other's work to make sure it is not biased
or unreliable.
D. Scientists prevent other scientists from seeing their experimental
data.
SUBMIT
Answers
Scientists examine each other's work to make sure it is not biased or unreliable this describes the process of peer review. The correct option is C.
What is a peer review?The peer-review process is used to verify academic scientific quality by confining an author's published work, research, or ideas to the scrutiny of others who are experts in the same field (peers).
Scientists examine each other's work to make sure it is not biased or unreliable this describes the process of peer review.
Thus, the correct option is C.
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An unidentified element melt at -7-2 c and boils at 58C. What is its physical state at room temperature
Answers
When a mosquito bites you and consumes some of your blood it is
acting as a(n) ____.
a. endoparasite
b. parasitoid
c. ectoparasite
d. metaparasite
Answers
When a mosquito bites you and consumes some of your blood, it is acting as an ectoparasite. So, option C is accurate.
An ectoparasite is an organism that lives on the external surface of its host and derives its nourishment or resources from the host's body. These parasites can be found on various animals, including humans, and they typically feed on blood, skin cells, or other bodily fluids.
In the case of a mosquito, it feeds on the blood of its host by piercing the skin with its mouthparts and sucking blood. The mosquito does not live inside the host's body but rather feeds externally. Therefore, the correct answer is option c, ectoparasite.
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Which effect of temperature rise causes a feedback resulting in a rise in global temperatures?
more severe storms
more water vapor in the atmosphere
less water vapor in the atmosphere
less severe storms
Answers
Answer:
Less water vapor in the atemosphere
Explanation:
Answer:
less water vapor in the atmosphere
Explanation:
Type the correct answer in the box. spell all words correctly. which environmental factor controls the amount sunlight that reaches underwater plants and animals? controls the amount sunlight that reaches underwater plants and animals.
Answers
Abiotic factors control the amount of sunlight that reaches underwater plants and animals.
The ecosystem's non-living elements are referred to as abiotic factors. These consist of elements like soil, wind, water, sunlight, temperature, and humidity. Abiotic components of an environment can be either chemical or physical. All living things may be impacted by abiotic factors in terms of their development, reproduction, and survival.
The following are examples of abiotic factors in an ecosystem:
Water
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How do musical embellishments help enhance a piece of music?
Answers
Musical embellishments are decorative or ornamental elements that are added to a musical piece to enhance its emotional expression or to make it more interesting or appealing. There are many different types of musical embellishments, including trills, turns, mordents, and vibrato, and they can be used to add variety and interest to a piece of music.
Embellishments can help to bring out the melody or theme of a piece of music, adding emphasis and expression to certain notes or phrases. They can also help to add a sense of movement or flow to the music, creating a sense of momentum or momentum. Additionally, embellishments can help to create a sense of drama or tension, particularly when used in a strategic or expressive way. Overall, embellishments can help to enrich the emotional content of a piece of music and make it more engaging and enjoyable for the listener.
___________ are the central building blocks of the nervous system.
Answers
Answer:
neuron is the answer
Explanation:
When is DNA replicated?
during mitosis
immediately before cytokinesis
GO phase
S phase
Answers
Answer:
S phase
Explanation:
DNA replicates in the S phase of the cell cycle and initiates at specific regions in the DNA sequence known as DNA replication ‘origins’. A number of proteins participate in DNA replication and the process is subject to scrutiny by cell surveillance mechanisms called cell cycle checkpoints.
Answer:
d
Explanation:
What are the major steps in forcing the release of sea urchin gametes? List 4.
Answers
Answer:
Sea urchin gametes are produced by injecting the urchins with 1mL of 0.5M Potassium Chloride solution. The solution is injected near the mouth of the urchin. This process kills the urchins, forcing them to release their sperm, in the case of a male, or eggs, in the case of a female
Explanation:
Based on the critical review of contemporary international sources, explain two key ideas for how uncertainty should be dealt with in the new Environmental Impact Assessment (EIA) procedures. (800 words with references)
Answers
Uncertainty is an important element of EIA procedures. Risk assessment and management, as well as improved communication and collaboration between stakeholders, are two key ideas for how uncertainty should be dealt with in the new EIA procedures.
There are two key ideas for how uncertainty should be dealt with in the new EIA procedures. First, there should be a focus on risk assessment and management. This involves identifying the sources of uncertainty, assessing the potential impact of these sources, developing strategies to reduce the risks associated with them, and monitoring the implementation of the strategies.
By focusing on risk assessment and management, potential impacts of uncertainty can be minimized, allowing for more informed and effective decision-making. Second, improved communication and collaboration between stakeholders is essential.
This involves actively engaging stakeholders in discussions surrounding potential sources of uncertainty, developing strategies to manage uncertainty, and ensuring that stakeholders are kept informed of any changes or developments.
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if recombinant dnase i is added to a vial of respiratory secretions from a cystic fibrosis patient, which result would indicate that the recombinant dnase i is functional?
Answers
Addition of recombinant DNase I to vials of respiratory secretions from cystic fibrosis patients decreased the viscosity of the secretions, indicating that recombinant DNase I is working.
Deoxyribonuclease (DNase) enzymes achieve a variety of important cellular functions by downgrading DNA by hydrolysis of the phosphodiester backbone. Deoxyribonuclease I (DNase I) enzymes cleave single- or double-stranded DNA and require divalent metal ions to hydrolyze DNA, producing 3 ΄-hydroxyl and 5 ΄-phosphorylated products. to generate
Airway clearance therapy (ACT) and recombinant human deoxyribonuclease (rhDNase) nebulization are the most commonly used methods for sputum mobilization. rhDNase cleaves extracellular DNA, reduces sputum viscosity, and transforms sputum from a non-flowing viscous gel to a fluid liquid.
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I NEED HELP IDENTIFYING THE STEPS OF MITOSIS!!! PLZ HELP THIS IS DUE TODAY
Answers
Answer: phases are prophase, prometaphase, metaphase, anaphase, and telophase
Explanation: i hope this helped