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Answer: Carbon Dating though measuring Carbon-14 levels

Explanation:

Scientist measure the age of a fossil determined on the Carbon-14 level compared to the Carbon-12 level. This method works because:

Answer:

True

Explanation:

dominant alleles essentially overpower or mask the recessive alleles and there are more prevalent over time

Dominant alleles will always increase in frequency -  this statement is true.

The term allele denotes the variant of a given gene. In genetics it is normal for genes to show deviations or diversity all alleles together make up the set of genetic information that defines a gene.

The frequency of an allele has nothing to do with whether it’s dominant or recessive. Recessive alleles can be more common that dominant alleles. It all depends on the allele, the evolutionary history of the population, and selective pressures from the environment.

The dominant allele increases in frequency as it masks recessive alleles. Not all individuals have homozygous dominant alleles but even with a heterozygous combination of alleles, the dominant allele will mask the recessive allele.

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Answer:

D

Explanation:

The Earth’s core has two different parts is true about the earth's layer.

The extremely hot and dense core of our planet is called the Earth's core. Underneath the chilly, brittle crust and the largely solid mantle is the ball-shaped core.

Earth was a homogeneous ball of hot rock when it first formed roughly 4.5 billion years ago. The ball heated up even more due to radioactive decay and heat left over after planetary formation (the collision, accretion, and compression of space rocks).

After roughly 500 million years, our young planet's temperature reached 1,538° Celsius (2,800° Fahrenheit), the temperature at which iron melts. The iron age refers to this crucial period in Earth's history.

Therefore, The Earth’s core has two different parts is true about the earth's layer.

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Answer:

Allopatric speciation

Explanation:

The kind of speciation that occurs when 2 populations of rabbits separated by water become different species is allopatric speciation.

Allopatric speciation occurs when two populations of the same organisms become physically separated and each population ends up developing unique characteristics that make them distinct species. This is as opposed to sympatric speciation in which a new species just spontaneously emerge from the existing population without any being separated from the population.

Other forms of speciations include parapatric speciation which occurs as a result of the spreading out of a population over a large geographical area and peripatric speciation which occurs as a result of the breaking off of a small group from a large group of organism.

In the illustration, the two populations of rabbits are separated physically by the river. Hence, the speciation that will occur if each population goes ahead to form a new species would be allopatric speciation.

The correct answer is C. A single round of DNA synthesis followed by two separate rounds of meiotic cell division.

During meiosis, the process of gametogenesis (formation of gametes), the DNA is replicated once, followed by two rounds of cell division. The purpose of meiosis is to produce haploid gametes (sperm and eggs) with half the number of chromosomes as the parent cell.

In meiosis I, homologous chromosomes pair up and undergo crossing over, leading to genetic recombination. The homologous chromosomes then separate, resulting in two haploid cells with duplicated chromosomes. In meiosis II, the sister chromatids of each chromosome separate, similar to mitosis, resulting in a total of four haploid cells with unduplicated chromosomes. These four cells are the final gametes produced through meiosis.

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Answer:

c. 50%

Explanation:

i just searched the answer up lol

Answer:

C

Explanation:

Of the options provided, the true statement regarding genetic mutations is that mutations may result from environmental agents. So option c is correct.

Environmental factors can induce mutations in the DNA of an organism, leading to changes in the genetic code that can have both positive and negative effects. These environmental agents can include exposure to radiation, chemicals, and certain viruses. In addition to environmental factors, mutations can also occur spontaneously during DNA replication or as a result of errors in cellular processes such as DNA repair.

While errors in DNA replication or duplication can lead to mutations, they are not necessarily fatal or irreparable. In fact, cells have a range of mechanisms to repair damaged or mutated DNA, including mismatch repair and nucleotide excision repair. However, in cases where the damage or mutation is extensive or affects critical genes, it can lead to serious consequences, including cell death or the development of cancer.

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Answer:don’t put pesticides that will harm humans on your crops.

Explanation: many pesticides in today’s world will get people sick and cause disease.

To obtain DNA from a crime scene or an individual, the key requirement is cells.

Clothing fibers, fingerprints, and pedigree analysis are not directly related to the collection or extraction of DNA. DNA, the genetic material, is contained within cells of an individual's body.

Therefore, to obtain DNA, one needs a sample that contains viable cells. This can include various biological materials like blood, saliva, hair follicles with the root, skin cells, or semen.

These samples are collected using appropriate forensic techniques and then subjected to DNA extraction processes to isolate and analyze the genetic material.

Through DNA analysis, forensic investigators can establish links between individuals, identify suspects, or provide evidence in criminal investigations.

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Answer:

well the plants live and die from life to death they get there nutrients from water from rain. and oxygen from the air and nitrogen from the ground. the plant grows and dies. when it dies it decompose and puts nitrogen back into the soil along with the seeds that where produced in it's life time.

Photosynthesis and cellular respiration move carbon, nitrogen and water through the different Earth systems by exchanging these elements between the biosphere, atmosphere, hydrosphere and geosphere through the processes of absorbing, converting, releasing and exchanging them.

Both photosynthesis and cellular respiration also involve the movement of nitrogen and water through the different Earth systems. Nitrogen is a critical element for the growth of plants and is taken up by plants through the roots, it is a key component of proteins and nucleic acids, and also plays a role in the formation of chlorophyll, which is essential for photosynthesis. Water is also essential for photosynthesis, as it is needed to convert light energy into chemical energy.

In summary, photosynthesis and cellular respiration are closely linked processes that move carbon, nitrogen, and water through the different Earth systems by taking in and releasing these elements in the atmosphere, hydrosphere, and geosphere, and providing energy for the biosphere.

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Answer:

The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes. In this theory, the first eukaryotic cell was probably an amoeba-like cell that got nutrients by phagocytosis and contained a nucleus that formed when a piece of the cytoplasmic membrane pinched off around the chromosomes. Some of these amoeba-like organisms ingested prokaryotic cells that then survived within the organism and developed a symbiotic relationship. Mitochondria formed when bacteria capable of aerobic respiration were ingested; chloroplasts formed when photosynthetic bacteria were ingested. They eventually lost their cell wall and much of their DNA because they were not of benefit within the host cell. Mitochondria and chloroplasts cannot grow outside their host cell.

Explanation:

The correct order of the steps of the scientific methods is Ask questions, Conduct background research, Construct a hypothesis, Test the hypothesis, Analyze the results, Draw conclusions, and Communicate the results.

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To prevent iron deficiency, it is important for children aged 1-3 years old need 7 milligrams of iron per day, while children aged 4-8 years old need 10 milligrams of iron per day.

Iron deficiency is a common nutrient deficiency that can affect children and adults. It occurs when the body does not get enough iron from the diet or is unable to absorb enough iron from the food that is consumed. Iron is an essential nutrient that is needed for the production of red blood cells, which carry oxygen throughout the body.

To prevent iron deficiency, it is important for children to get enough iron in their diet. The recommended daily intake of iron for children varies depending on their age and gender. According to the Centers for Disease Control and Prevention (CDC), children aged 1-3 years old need 7 milligrams of iron per day, while children aged 4-8 years old need 10 milligrams of iron per day.

To ensure that children are getting enough iron in their diet, it is important to include iron-rich foods in their meals and snacks. Some good sources of iron for children include meat, poultry, fish, beans, fortified cereals, and dried fruits. It is also important for children to consume foods that are rich in vitamin C, as vitamin C can help the body absorb iron more effectively.

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Answer:

by studying maps geologists can see the shape and geology of the earth's surface and deduce the geological structures that are hidden beneath the surface.

Answer:

Epithelial cells are the protective cells. They form the outer covering of the body surface which protects the body from any external danger.Cuboidal epithelial cells, as their name suggests, are shaped like cubes. These are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands. Columnar epithelial cells are long and thin, like columns. These are usually found in places that secrete mucus such as the stomach.

Answer:

option b

Explanation:

Answer B.) is the correct answer.

Answer:

They fill new roles in changed environment

Explanation:

The functional group shown in the image with three hydrogen atoms bonded to one carbon atom is a methyl group, and the correct answer is option B.

Functional groups are specific atoms or groups of atoms that are responsible for the chemical properties and reactions of a molecule. A methyl group is a non-reactive alkyl functional group consisting of one carbon atom bonded to three hydrogen atoms (HaC-). It is often represented as -CH3 and is commonly found in organic compounds, including fats, oils, and many other organic molecules. The presence of a methyl group can affect the physical and chemical properties of a molecule, such as its solubility, boiling point, and reactivity. Therefore, recognizing functional groups is essential for understanding the structure and properties of organic compounds. In this question, the functional group shown in the image matches the description of a methyl group, making option B the correct answer.

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The global forestry industry is facing various challenges, including deforestation, climate change, and increased demand for wood products. However, efforts are being made to promote sustainable practices, such as forest management and reforestation initiatives.

Technological advancements and an increased focus on environmental conservation have led to improved efficiency in the industry, as well as more environmentally friendly practices.
Most of the world's lumber supply comes from two major regions: North America and Europe. North America, particularly the United States and Canada, has a large forestry industry with abundant forests and a strong infrastructure for timber production. Canada is one of the world's leading producers of softwood lumber, while the United States produces both softwood and hardwood lumber.
Europe also contributes significantly to the global lumber supply, with countries like Russia, Sweden, and Finland being major players in the industry. Russia has vast forests, and its timber industry is a crucial part of its economy. Sweden and Finland, with their advanced forest management systems, produce high-quality softwood and hardwood lumber.
In conclusion, the current state of the world's forestry industries is shaped by various challenges and opportunities, with a growing focus on sustainability and technological advancements. North America and Europe are the two major regions supplying the world with lumber, each contributing significantly to the global production of wood products.

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Answer:

chloroplast

Explanation:

Answer:

c

Explanation:

Physical and psychological factors play a crucial role in succumbing to body issues. Body image is a multifaceted phenomenon that is influenced by numerous physical and psychological factors.

Physical factors that play a role in succumbing to body issues: Body weight: Body weight is the most apparent physical factor that affects body image. People with low body weight or obesity are more susceptible to body image concerns. Body Shape: Body shape is another physical factor that impacts body image. People with specific body shapes like pear-shaped or apple-shaped are prone to body image issues. Skin color: Skin color can also have an impact on body image. For instance, people with dark skin may feel inferior or ashamed of their bodies because of societal norms. Psychological factors that play a role in succumbing to body issues: Depression and anxiety: Depression and anxiety are among the most common psychological factors that impact body image. People with depression and anxiety are more likely to experience body dissatisfaction. Low self-esteem: Low self-esteem is another psychological factor that influences body image. People with low self-esteem have negative thoughts about themselves, which can lead to body image issues. Social pressure: Social pressure is a psychological factor that contributes to body image problems. Social pressure from friends, family, or media can lead to unrealistic body image expectations.

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Answer:

Explanation:Photosynthesis and aerobic respiration are both part of a cyclic process of biochemical reactions. ... Photosynthesis requires the products of aerobic respiration (carbon dioxide and water), while aerobic respiration requires the products of photosynthesis (glucose and oxygen).

Glycogen, a form of glucose storage, is found in the muscles and liver.

In animals, glucose is stored as a complex carbohydrate called glycogen. It is created and kept in the muscles and liver, where it may be quickly changed back into glucose as needed.

Glycogen is the appropriate response to the question of how glucose is stored in the liver and muscles.

The body needs glucose as a source of energy. To keep blood sugar levels steady, the body must control glucose levels. In the liver and muscles, extra glucose is stored as glycogen. Glycogen is converted into glucose and delivered into the bloodstream when energy is required.

Each branch of the highly branching polymer of glucose molecules that makes up glycogen contains several glucose subunits. About 100 grams of glycogen are stored in the liver; this glycogen can be converted to glucose and released into the bloodstream to regulate blood sugar levels. On the other hand, during activity, muscle glycogen is predominantly used to produce energy. Glycogen is not released into the bloodstream even though muscle tissue stores significantly more of it than the liver does.

In conclusion, glycogen, a type of glucose, is stored in the liver and muscles. When required, this complex carbohydrate can be swiftly broken down into glucose to act as a reserve energy source.

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