What is carrying capacity?

Answer:

internal structure of a cell

Answer:

D

Explanation:

To copy original DNA strands into complementary strands​

The option (D) is correct. To copy original DNA strands into complimentary strands​.

Complementary DNA (cDNA) is a DNA copy of a messenger RNA (mRNA) molecule produced by reverse transcriptase, a DNA polymerase that can use either DNA or RNA as a template.

Moreover, the complementary strand for DNA must follow the base pairing and polarity rules. Pairing means that A=T and G=C. Polarity means that the strands have to run in opposite directions. First write the correct base pairing below the original sequence and label the 5' and 3' ends.

Therefore, the upper strand of DNA is the "mRNA-like" strand. The lower strand is the strand that is complementary to the mRNA.

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Answer:

b

Explanation:

Alkenone molecules from phytoplankton are robust enough to survive the effects of weathering and chemical breakdown for 110 million years. Rock layers yield chemical traces of these ancient organisms. Their chemical composition indicates ancient water temperatures.

Answer:

B

Explanation:

Alkenone molecules from phytoplankton are robust enough to survive the effects of weathering and chemical breakdown for 110 million years. Rock layers yield chemical traces of these ancient organisms. Their chemical composition indicates ancient water temperatures.

The sample is heated to almost the boiling point in PCR because the DNA denatures or separates. The polymerase chain reaction is carried out in a thermocycler, which enables the reaction temperature to be repeatedly altered to allow for the denaturation and annealing of DNA strands. The correct option is c.

PCR or Polymerase Chain Reaction is a molecular biology technique that is used to amplify a single copy or a few copies of a segment of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.

The separation of the double-stranded DNA into two complementary strands that are separated is referred to as DNA denaturation or separation. When DNA is heated, hydrogen bonds that hold the two complementary strands of DNA together are disrupted, causing the strands to separate. This process is referred to as denaturation, and it usually occurs at a temperature of 95 degrees Celsius.

The PCR process has three basic steps, which are repeated for 20-40 cycles to achieve millions of copies of DNA sequences.

Step 1: Denaturation: The double-stranded DNA sample is heated to nearly boiling point, which separates the DNA strands by disrupting the hydrogen bonds between them.

Step 2: Annealing: The temperature is lowered to around 50–60°C, which allows the primers (short pieces of DNA that match the start and end of the target DNA sequence) to bind to the single-stranded DNA template at the opposite ends of the target DNA sequence.

Step 3: Extension: The temperature is raised to about 72°C, which activates Taq polymerase, a heat-stable enzyme that extends the primers by attaching new nucleotides to the 3′ end of each primer, creating new complementary DNA strands that are extended from the primers.

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Once it enters the cytoplasm of a host cell and sheds its capsid, replication of HIV begins when reverse transcriptase is used to synthesize a double strand of DNA from the viral RNA.

Once it enters the cytoplasm of a host cell and sheds its capsid, replication of HIV begins when reverse transcriptase is used to synthesize a double strand of DNA from the viral RNA.

What is HIV?HIV stands for Human Immunodeficiency Virus, a virus that attacks and weakens the immune system of humans. HIV replicates in the host cell cytoplasm after shedding its capsid, and it is called replication. When the reverse transcriptase enzyme is used to create a double-stranded DNA from the viral RNA, replication begins. HIV attacks the T-helper cells in the immune system, which are in charge of defending the body against foreign invaders. HIV gets into the bloodstream and travels to the CD4 T-helper cells after being contracted. The virus begins to reproduce after it has entered the host cell's cytoplasm. The viral RNA then acts as a template for reverse transcriptase, an enzyme that catalyzes the creation of a DNA copy of the RNA. The RNA template is destroyed and a second DNA strand is created by the same enzyme, reverse transcriptase. This second DNA strand is complementary to the first and forms a double-stranded DNA molecule.

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Yes. This statement is true. Changes to an organism's physical environment are likely to result in an evolutionary change.

When there's a change in an organism's environment, it forces the organisms to adapt to new changes. Eventually, it leads to evolutionary changes.

For example, if an organism eats a particular type of plant and then disease occurs and destroys all those plants, the organism either has to fight the disease or adapt to a new type of plant to fulfill its energy needs.

Moreover, when a particular type of organism is isolated and can't find similar mates to reproduce, mutations and chromosomal variations occur forcing them into a new environment and they eventually evolve into new species.

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Animals, Plants, and Fungi are multicellular, meaning that they have more than one cell in their body. Each cell also has a nucleus in it, a property which the other two kingdoms, Bacteria and Eubacteria don't have.

Pls give brainliest.

Answer:

Emigration

Explanation:

If there is a large number of deaths, then the population would move onto another area to find a mate, more food, and to be together to protect themselves from danger

The component of population that will most likely increase with a high death rate would be emigration.

When the death rate shoots up in a particular environment due to certain factors, organisms are bound to emigrate away from such environment to avoid death from reaching them.

It is a natural instinct of every living organism to respond to stimuli. A high death rate is a stimulus that organisms would want to move away from.

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Answer:

A. Mobility

Explanation:

The Polymerase Chain Reaction(PCR) involves three main steps: denaturation, annealing, and extension.

The Polymerase Chain Reaction (PCR) has changed biotechnology by allowing scientists to study DNA more easily and quickly than ever before.

The Polymerase Chain Reaction (PCR) is a technique used in molecular biology to amplify a single copy or a few copies of a piece of DNA repeatedly. PCR can be used to create copies of genetic material from a variety of sources, including forensic samples, pathogen detection, ancient DNA studies, and genetic testing. It can also be used to make products for gene therapy and synthetic biology.

PCR involves three main steps: denaturation, annealing, and extension.

During the first step of PCR, denaturation, the double-stranded DNA template is separated into two single strands by heating it to 94-96°C for 15-30 seconds.

In the next step, annealing, the temperature is lowered to 50-60°C to enable the primers to bind to their complementary sequences on the single-stranded template DNA.

Finally, during extension, the temperature is raised to 72°C, and the Taq polymerase enzyme extends the primers by adding nucleotides to the 3' end of each primer. The extension temperature is usually maintained for 1-2 minutes, depending on the length of the target DNA sequence.

The Polymerase Chain Reaction (PCR) has changed biotechnology by allowing scientists to study DNA more easily and quickly than ever before. PCR is a quick and easy way to amplify DNA fragments from small amounts of starting material, such as a single cell or a single hair follicle. PCR has also enabled researchers to create new techniques for studying genes and proteins, such as DNA sequencing and protein expression analysis. PCR has transformed many areas of biology, from genetics and biochemistry to microbiology and forensic science.

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Answer:

The proportion of oxygen went up because of photosynthesis by plants. The proportion of carbon dioxide went down because: it was locked up in sedimentary rocks (such as limestone) and in fossil fuels. it was absorbed by plants for photosynthesis.

Explanation:

Answer:

Flexibility

Explanation:

Flexibility is the ability to move your to and fro from full range of movement

Answer:

Felixibity

Explanation:

Flexibility is the ability of your joints to move through their full range of motion without pain or stiffness.

Orlistat inhibits pancreatic lipase activity, whereas olestra is a non-absorbable fat substitute. Both can lead to undigested lipids in the colon, but they achieve this through different mechanisms..

Orlistat is a drug that inhibits the activity of pancreatic lipase, which is an enzyme that breaks down fats in the small intestine. By inhibiting pancreatic lipase, orlistat prevents the digestion and absorption of dietary fats, leading to the presence of undigested lipids in the colon. Orlistat is used as a weight loss aid, as it reduces the amount of calories that can be absorbed from dietary fats.

Olestra, on the other hand, is a fat substitute that is not digested or absorbed by the body. Olestra is a non-caloric compound made from sucrose and fatty acids that has a similar texture and mouthfeel to fats, but it is too large to be absorbed by the small intestine. Because olestra is not absorbed, it passes through the digestive system without contributing calories or being stored as fat. However, because olestra is not absorbed, it can lead to the presence of undigested lipids in the colon, which can cause gastrointestinal symptoms such as cramping, bloating, and diarrhea.

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Answer:

These plants grow in very difficult environments. So, researching their genes may help botanists working in agricultural areas develop crops that can grow in inhospitable areas. Also, understanding how these plants survive in harsh conditions may help conservation scientists protect plants if their environments change.

Explanation:

Answer:

bc it's named thermosphere

Answer:

CAM plants temporally separate carbon fixation and the Calvin cycle. Carbon dioxide diffuses into leaves during the night (when stomata are open) and is fixed into oxaloacetate by PEP carboxylase, which attaches the carbon dioxide to the three-carbon molecule PEP.

Explanation:

Answer:

Independent: the type of humming bird food

Dependent: the amount of humming birds that come to the feeder

Explanation:

Answer:

Amino acid substitutions at the interaction interface may result in binding affinity changes, and thus affect the structure of the protein complex. ... This structural change may significantly affect the binding energy, and make the protein complex unstable

Explanation:

I hope it helped

A sensitive and dynamic method of controlling protein activity, stability, protein interaction, and subcellular localization is provided by phosphorylation. Multiple kinases frequently target global regulators, changing the expression of numerous genes.

Kinase mutations can deactivate apoptotic pathways, activate proliferative pathways that disrupt cell cycle checkpoints and lead to genomic instability, inhibit or eliminate DNA damage response, increase angiogenesis and cell motility, or all of the above.Kinase mutations can decrease or abolish the DNA damage response, increase angiogenesis and cell motility, activate proliferative pathways that break cell cycle checkpoints and cause genomic instability, or do all of the above.Hanks-type kinases and phosphatases are used by bacteria for signal transduction, just like eukaryotes, and protein phosphorylation is involved in a variety of cellular processes.

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We used the stem plot because it is an effective way to display the distribution of yearly rock sole recruitment, as it groups data into stem (left) and leaf (right) digits.

Recruitment is one of the critical measures of ocean ecosystems' health. The recruitment of rock sole in the Bering Sea from 1973 to 2000 is shown below. 1973 - 173 1974 - 234 1975 - 616 1976 - 344 1977 - 515 1978 - 576 1979 - 727 1980 - 1411 1981 - 1431 1982 - 1250 1983 - 2246 1984 - 1793 1985 - 1793 1986 - 2809 1987 - 4700 1988 - 1702 1989 - 1119 1990 - 2407 1991 - 1049 1992 - 505 1993 - 998 1994 - 505 1995 - 304 1996 - 425 1997 - 214 1998 - 385 1999 - 445 2000 - 676

We have to create a stem plot for rock sole in the Bering Sea for the given data, i.e., Recruitment (millions) from 1973 to 2000. We should round the data to the nearest hundred, as instructed above to make the stemplot. The stemplot for the given data is shown below. 0| 3 4 5 5 6 7 7 8 9 1| 0 0 1 1 2 4 7 7 8 9 2| 2 3 4 5

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Based on the given options, the correct materials that light could be passing through when transitioning from glycerin into a new medium are:

In summary, air, plexiglass, and diamond are materials that can allow light to pass through them, while helium is not a suitable medium for light transmission.

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Protein concentration is the component that has a much lower concentration in cerebrospinal fluid (CSF) than in cerebral capillary blood. Option D is correct.

Cerebrospinal fluid (CSF) is the clear, colorless fluid which surrounds the brain as well as spinal cord. It plays essential roles in providing mechanical protection, buoyancy, and nutrient supply to the central nervous system. CSF is derived from plasma (the liquid component of blood) through a specialized barrier called the blood-brain barrier.

The blood-brain barrier limits the movement of various substances, including ions and large molecules such as proteins, from the bloodstream into the CSF. It is highly selective and tightly regulates the composition of CSF to maintain optimal brain function.

Hence, D. is the correct option.

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Answer:

Us goverenment article

Explanation:

Answer:

An actual computer virus is a malicious software, often known as malware, that can harm a computer and its users.

Virus hoaxes are false or misleading information about viruses that circulate through various communication channels.

They can be more dangerous than actual viruses due to their ability to spread quickly, cause panic, and undermine effective public health measures.

Virus hoaxes are deceptive messages or claims that often exaggerate the severity or impact of a particular virus. They can be spread through social media, email chains, or word of mouth. These hoaxes may include misinformation about symptoms, transmission methods, or false remedies, leading people to take ineffective or even harmful actions.

What makes virus hoaxes particularly dangerous is their potential to create panic and misinformation at a rapid pace. The viral nature of social media and other communication platforms allows these hoaxes to reach a wide audience within a short period. As a result, people may make decisions based on false information, such as avoiding necessary medical treatment, taking unnecessary precautions, or spreading fear and misinformation to others.

Moreover, virus hoaxes can undermine public health efforts by diverting attention and resources from legitimate preventive measures. They can erode trust in healthcare authorities and disrupt the dissemination of accurate information, making it harder for individuals to make informed decisions and follow recommended guidelines.

This can have severe consequences, especially during outbreaks or pandemics, where timely and accurate information is crucial for public safety. Therefore, it is essential to verify the credibility of information and rely on trusted sources to mitigate the risks associated with virus hoaxes.

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Answer:

stimuli

Hope this helps :) !!!

In pavlov's work, he found that dogs would salivate to various stimuli such as seeing someone who usually brings food enter the room or a cabinet door opening.

A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.

In the simple words it is defined as the reactions are the activities which are organism do were to react or response anything which is done surrounding its environment.

For example if we kept a potted plant in a dark room which have only one window and we kept it near the window then the plant will move in the direction of the window because it want sunlight for the process of photosynthesis. it is the physical change in the plan that makes it to move to the side of window.

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When the class performs a sea cucumber dissection. It belongs to the holothuroidea class.Thus, the correct answer is Holothuroidea.

More than 1,400 different species of soft-bodied sea cucumbers are found in the Class Holothuroidea.

Due to their tubular bodies, which lack a skeleton that can be seen and hard appendices, holothurians do not first resemble other echinoderms.

Moreover, a bilateral symmetry doubles the fivefold symmetry that is typical for echinoderms while yet being structurally retained, giving them the appearance of chordates. Nonetheless, some species still display a central symmetry through five 'radii' that run from the mouth to the anus (much like sea urchins), where the tube feet are attached. Hence, unlike sea stars and other echinoderms, which have "oral" or "aboral" faces, the

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