alix-panabières c, pantel k. clinical applications of circulating tumor cells and circulating tumor dna as liquid biopsy. cancer discov. 2016; 6: 479–91.

Answer/Explanation:

It results in offspring with genetic variation. 2 different mates must be used in sexual reproduction. This is because each person is different since cells are produced and combined differently in the original offsprings. If the two adults were exactly the same, the offspring would have the exact same cell traits. Likewise will be done for the offspring of the two adults. The genes may be similiar to the ones of the adults, but since combined it will not be an exact replica. In the long run sexual reproduction will result in an offspring with slightly different traits or genetic variation.

Answer:

biotechnology has made it possible to modify or introduce genes between organisms

Explanation:

The term that corresponds to the given description is "centromere."

The centromere is a region of a chromosome that plays a crucial role in cell division. It is responsible for ensuring the proper segregation of chromosomes during mitosis and meiosis. The centromere contains specialized DNA sequences and proteins that help in attaching the chromosomes to the spindle fibers.

This attachment is essential for the accurate distribution of genetic material to daughter cells during cell division. The centromere is a distinct region on a chromosome that can be identified by staining differences when treated with Giemsa stain.

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Answer:

b

Explanation: thermal energy transferred from the hotter object to the cooler one until they are at an equilibrium because heat always flows into the cooler object.

Answer:

Explanation:

1,2,3,4,5.6,7,8

The statement that is true concerning conventional medicine is that it is often referred to as allopathic or traditional medicine.

Correct option is, a. It is often referred to as allopathic or traditional medicine.

Conventional medicine or western medicine is the standard practice of treating ailments by medical professionals. It is referred to as allopathic or traditional medicine because it is practiced by most healthcare professionals to help alleviate the symptoms of their patients. It is based on the modern approach to medical science that includes surgery, chemotherapy, and prescription drugs.

The conventional medicine approach treats disease and illness with various therapeutic techniques that can include surgery, radiation, chemotherapy, and other approaches. It is different from alternative medicines as it emphasizes on biological research and medical intervention rather than personal responsibility and holistic approaches.It is often referred to as allopathic or traditional medicine.

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The cells must not be damaged during the smear preparation and staining procedure; if done correctly, microscopic examination can reveal their true shape and arrangement.

To avoid removal when the stain is rinsed off the slide, the cells must be heated attached to the slide. For correct viewing following staining, it is crucial to reduce any cell artifacts or distortion. To observe individual cells, smears must be thin.

A well-made smear fulfills two goals. In order to stain and study germs, it makes them stick to a slide. Additionally, it destroys them, making harmful germs manageable. Learning to identify the appropriate density of bacteria to place on the slide is one goal of making smears.

To prevent them from being washed away during the staining processes, the bacteria must be firmly adhered to the slide.

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Answer:

Pollen from a plant is a biotic factor.

Explanation:

The reason why pollen is a biotic factor is because the pollen  has life and it is basically a living cell which can give life to a flower.

Answer:

tRNA

Explanation:

have to have 20 characters

Answer:

Ghana rose as result of good economy and fell as a result of losing its monopoly on profitable trade routes. Mail rose as a result of strong military leadership and fell when the empire became too large and too weak for the king to rule. And the same happened to Songhai.

Answer:Ghana rose as a result of a good economy and fell as a result of losing its monopoly on profitable trade routes. Mali rose as a result of strong military leadership and fell when the empire became too large for a weak king to rule. History repeated itself when the same happened to Songhai.

Explanation:

how I know that because tell me that.

The phase of the OPT (Optimum Performance Training) model that aims to enhance stabilization endurance and simultaneously increase prime-mover strength is the Stabilization Endurance Phase.

In this phase, the focus is on improving muscular endurance, enhancing the stability of the joints, and developing efficient movement patterns. The exercises performed during this phase typically involve low loads and high repetitions, targeting the stabilizing muscles and promoting postural alignment. By improving stabilization endurance, the body becomes better equipped to maintain proper alignment and control during more intense exercises in the subsequent phases of the OPT model. The capacity to continue contracting a muscle, or set of muscles, despite opposition over time, such as weights or body weight, is known as muscular endurance.

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Answer:

True becuase it makes two daughter cells with the same DNA so it must duplicate to creat a set for each

Answer:

I think your right the first one

Explanation:

‍♀

Answer:

Hope this helps :)

Explanation:

Lesson 04.02 The Biosphere

• Identify factors that determine Earth's climates

Latitude, Ocean currents, wind/ air masses, Elevation, Relief, and Nearness to water are all factors that determine the Earth’s climate.

• Explain how climate and seasonal variations affect Earth’s varying biomes

With the changing climate and season it has a big effect on Earth’s varying biomes. Extreme heat rising in temperature would cause species to travel to a colder region. Climate change can have an effect on the arctic region. This would affect the life of polar bears, their hunting technique would be affected and without being able to hunt they will starve and later it can lead them to extinction. Other animals can be on the verge of extinction because of the dramatic climate change’s.

• Describe biotic and abiotic features of Earth's six major biomes

Tundra, Coniferous, Deciduous, Tropical rain forests, Grasslands, and deserts are the biotic and abiotic features of earth's six major biomes. The Tundra is a permanently frozen habitat. Plant life in this biome includes mosses, grasses, small flowers, shrubs. The animal life in the Tundra biome are birds, foxes, wolves, and reindeers. The coniferous also known as the Evergreen biome is a cold climate. This biome provides enough rainfall for trees to grow. The animal life in this biome include mooses, squirrels, beavers, and rabbits. Deciduous has a moderate climate. It has a long growing type season that is followed by a cold season. Leaves of maple or oak trees will fall off. This biome has many types of birds and animals. The Rainforest biome provides a lot of rain and it is hot all year around. This biome has large and tall trees, It has a large variety of plants. It has many different types of animals such as ocelots, sloths, jaguars, lemurs and other types of animals. The Grasslands has a moderate climate but there is not enough rain provided for this biome. Large herds of animals are in this biome such as Lions, prairie dogs, Bisons, Badgers, Coyotes, horses, and other animals. Deserts have a moderate to hot temperature with very little rain. The animals include lizards, camels, coyotes, scorpions and other animals.

• Describe the habitats of coastal, freshwater, and estuary ecosystems

Habitats in the estuary ecosystem include, reefs, kelp forests, deepwater swamps, coastal marshes, mangroves, submerged aquatic vegetation, riparian forests and other habitats that relate to the ones listed.

Lesson 04.03 Ecosystems

• Describe four factors that affect population size

The four factors that affect the population size are Birth Rate, Death Rate, Immigration, and emigration.

• Identify factors that limit population growth

Factors that limit population growth are, food limitations, climate changes, seasonal cycles, and pollutants in the environment.

• Explain the difference between primary and secondary succession

The primary succession have newly exposed or newly formed rocks grouped by living things for the first time. The secondary succession is an area that has previously been occupied by living things that have been disturbed.

• Difference between habitat and niche

The habitat and niche has a slight difference. A Habitat is a place where an organism lives. A Niche is an organism’s role in the environment. The Habitat is focused on how an environment impacts organisms while Niche focuses on how the organism impacts the environment.

\(PI3K,\) the mechanism does \(pi-3\) phosphate promote activation of pkb .

Normally, the regulatory subunit linked to the active receptor directly stimulates \(PI3K\)or is indirectly stimulated by adaptor molecules such as the insulin receptor substrate (IRS) proteins. A RAS protein that binds to GTP can also activate \(PI3K\).

A receptor tyrosine kinase (RTK) on the plasma membrane is triggered when an external ligand binds to it, producing receptor dimerization and cross-phosphorylation of tyrosine residues in the intracellular domains. Cell metabolism, growth, proliferation, and survival are all influenced by protein kinase B, also known as Akt. Phosphoinositide-3-kinase is a key player in a multi-step process that regulates its activation.

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Answer:

D

Explanation:

D: A statistical test having high power also has high probability for finding significant support.

Answer:

D

Explanation:

Answer:

scientists combine several well-tested techniques to find out the age of fossils. relative dating is when fossils and layers of rock are placed in order from older to younger, and radiometric dating allows the actual ages of certain type of rocks to be calculated.

Answer:

Repeated analyses of the fossil finding it to be the same age each time

Explanation:

i took the test and got it right :]

Answer:

precipitation

Explanation:

The instrument being used in the metabolism lab likely requires a warm-up period to stabilize the temperature and ensure accurate measurements.

Metabolic experiments often involve sensitive instruments like calorimeters or respirometers that require stable conditions for proper functioning. A calorimeter measures heat transfer, so it must be at a constant temperature before use to ensure accurate readings. Similarly, a respirometer measures oxygen consumption, so it must be stabilized to ensure accurate measurements of metabolic rate. The warm-up period allows for the instrument to reach a stable and consistent temperature, pressure, and other conditions. Failing to warm up the instrument can lead to inaccurate measurements, which can affect the results of the experiment and ultimately the conclusions drawn from the data.

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Extinction of a species means that all members of the species have died out and have left no descendants.

This occurs when a species cannot adapt to changes in its environment or when it is over-harvested or hunted to the point of extinction. It is a significant loss to the biodiversity of the planet and can have far-reaching impacts on ecosystems and other species.

Extinction occurs when every individual of a species dies, and there are no remaining members to reproduce and continue the species. This is different from a species experiencing a decline in population or a reduction in its geographic range. Extinction is the complete disappearance of a species from Earth.

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The term you are referring to is "natural resources." Natural resources encompass all the elements and materials present in the environment that are considered valuable and useful for human activities. They include everything that is available in its natural state and can be used as productive inputs for various purposes.

Natural resources can be classified into different categories based on their origin and characteristics. Here are some examples:

1. Land and Soil: Land provides a physical space for human activities and supports various ecosystems. It includes arable land for agriculture, forests, grasslands, and other terrestrial environments. Soil, a crucial component of land, is essential for plant growth and agriculture.

2. Water Resources: Water is a vital natural resource, necessary for drinking, irrigation, industrial processes, and the functioning of ecosystems. It includes freshwater sources such as rivers, lakes, and groundwater.

3. Mineral and Energy Resources: This category includes minerals, ores, fossil fuels, and other energy sources. Examples include coal, oil, natural gas, uranium, iron ore, copper, gold, and various other minerals that are extracted and used in industries.

4. Forests and Biodiversity: Forests are rich sources of timber, wood products, and non-timber forest products. They also provide habitat for numerous species and play a crucial role in carbon sequestration and climate regulation.

5. Air and Atmosphere: While not typically thought of as a resource, the atmosphere provides essential gases, such as oxygen and nitrogen, necessary for life. It is also affected by human activities and is a vital component in climate regulation.

Natural resources are essential for sustaining human life and supporting economic activities. However, their availability and distribution are not uniform globally, leading to challenges in resource management, conservation, and equitable access. Responsible and sustainable use of natural resources is crucial to ensure their long-term availability and to mitigate negative environmental impacts.

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B. Abscess. The presence of an anechoic mass within the prostate during a transrectal ultrasound in a patient with acute prostatitis is most likely indicative of an abscess.

The most likely interpretation for an anechoic mass within the prostate during a transrectal ultrasound in a patient with acute prostatitis is an abscess. An abscess is a localized collection of pus formed as a result of an infection. In the case of acute prostatitis, bacteria can infect the prostate gland, leading to the formation of an abscess. On ultrasound, an abscess typically appears as an anechoic (black) mass due to the fluid content within it. The absence of internal echoes is consistent with the low-density nature of pus. Other options such as prostate utricle cyst, hematoma, lymphocele, and seroma are less likely in the context of acute prostatitis. It is crucial to further evaluate and manage the patient with appropriate clinical correlation and possibly additional diagnostic tests or interventions.

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The phrase "epigenetic modification," also known as "DNA methylated bases," refers to the cell change associated with variable levels of cytosine methylation on the cytosine bases of ill patients.

Inadequate epigenetic markings can cause birth abnormalities, childhood illnesses, or disease signs at various stages of life. Additionally, epigenetic systems control how an organism develops and adapts throughout its lifetime, and changes to these mechanisms may cause numerous diseases like cancer.

A person's appearance, susceptibility to certain diseases, and gender at birth are all determined by their genes, which are segments of DNA. Gene on/off status is affected by epigenetic modifications. Epigenetic alterations only affect which genes are activated and inactive, not the DNA code.

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The observation that would provide the strongest evidence that the role of the macromolecule is the storage of energy is as follows: All of the monomers are identical, and they are composed only of carbon, oxygen, and hydrogen (option B).

Macromolecules are very large molecule, especially used in reference to large biological polymers (e.g. nucleic acids and proteins).

In biological organisms, there are four major macromolecules as follows;

Each of these macromolecules have a specific function in the cell. The macromolecule responsible for energy storage is carbohydrates and lipids.

However, the monomers of these macromolecules are made up of carbon, hydrogen and oxygen only.

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Answer:  Lichens affect every species in the ecosystem, in 2013 Russia had a dramatic lichen die off which caused 61,000, 20% of the entire reindeer population to die from starvation. And with fewer deers, the bears and wolves also suffered from the loss of lichens and if it takes a long time for lichens to grow back in an ecosystem, animal declines may take years if ever to be corrected.  Lichens serve as a basis for several food chains, especially in artic communities.

The argument which shows why lichens are necessary to establish a new ecosystem is as follows;

Lichens are known to enable algae to live all over the world in many different climates.

On this note, lichens also provide a means to convert carbon dioxide in the atmosphere through photosynthesis into oxygen, a process required by all to survive.

Additionally, lichens provide us with valuable information about the environment around us.

On this basis, lichens are important for establishing a new ecosystem after an extreme disturbance.

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Answer:

please give me brainlist and follow

Explanation:

At one end, the tRNA has an anticodon of 3'-UAC-5', and it binds to a codon in an mRNA that has a sequence of 5'-AUG-3' through complementary base pairing. The other end of the tRNA carries the amino acid methionine (Met), which is the the amino acid specified by the mRNA codon AUG.