Explain how nucleotide subunits link to form a single DNA strand.

the native american children were forced to assimilate by forcing them to attend boarding schools they were forced to learn english, wear uniforms and force to study under study standards

An element having an atomic number of eight and a mass number of 18 will contain eight protons.

The total number of protons and neutrons in the nucleus of an atom of a specific element is known as the atom's "atomic weight."

The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number. This is the number of protons present in the nucleus of each atom of that element, or the proton number, for conventional nuclei.

Ordinary chemical elements can be uniquely identified by their atomic number.

The atomic number is significant because it allows you to determine which element an atom belongs to. The fact that the contemporary periodic table is arranged according to increasing atomic number is another significant factor in why it matters. The atomic number is a crucial factor in defining an element's properties, to sum up.

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Answer:

The function that makes HIV virus unique is option B: It attacks and destroys certain cells in the bodies of its host organism

HIV is a viral disease popularly known as Human Immunodeficiency Virus.

It is transmitted through exchange of blood and semen such as blood transfusion, sexual intercourse, sharing of sharp objects.

HIV attacks its host by weakening and destroying the antibodies and the entire immune system of the host

Any host organism that is affected by Human Immunodeficiency Virus will be susceptible to different kinds of ailments because certain cells responsible for fighting these diseases have been

Human Immunodeficiency Virus will be susceptible to different kinds of ailments because certain cells responsible for fighting these diseases have been attacked and destroyed

Therefore, the function that makes the HIV virus unique is that it attacks and destroys certain cells in the bodies of its host organism

The possibilities of the offspring to have dimples is 75% (TT, Tt and Tt) and no dimples are 25% (tt) because both the parents are heterozygous dominant.

Mendelian inheritance is a type of biological inheritance that follows the principles that were initially proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 by Hugo de Vries and Carl Correns, and popularized by William Bateson.

Mendel put out the hypothesis that, in order for reproduction to occur, the inherited components need to partition themselves into reproductive cells. It had come to his attention that permitting hybrid pea plants to self-pollinate would result in offspring that did not resemble their respective parents in appearance.

Law of Dominance is one of Mendel's three proposed laws of inheritance, which also includes Law of Inheritance. The law that enforced segregation. The Principle of Independent Assortment is a Law.

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Light-dependent reactions produce ATP and NADPH that are used during light-independent reactions. Chloroplasts could not carry out photosynthesis to produce sugars because no ATP or NADPH would be available to carry out the Calvin cycle.

Photosynthesis is the process through which plants take solar energy to produce organic compounds. Two alternating and closely related stages are involved in this process.

During this stage, chlorophyll molecules absorb luminous energy from the sun and turn it into chemical energy.

This event takes place in the thylakoidal membrane where the electron transporter chain is located.

The final result is the production of ATP and NADPH and oxygen release from water molecules.

This stage is known as the Calvin cycle and occurs in the chloroplast stroma.

CO₂ enters the leaves and fixates, producing organic compounds like carbohydrates.

The whole cycle is possible because it uses ATP and NADPH produced during light-dependent reactions.

According to this information, chloroplasts could not carry out photosynthesis to produce sugars because, in the absence of light-dependent reactions, solar energy could not be absorbed, and chemical energy needed for the Calvin cycle would not be produced.

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Answer

B - because they are isolated from human embryos

Explanation

Stem cells are undifferentiated or partially differentiated cells that can differentiate into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage. They are found in both embryonic and adult organisms

We have to consider that the DNA is first transcribed into pre mRNA in the nucleus of the cell by the RNA polymerase. After this process, the non-coding fragments (introns) of the molecule are spliced by ribonucleoproteins (snRNP). Eventually, each end of the pre mRNA is modified, being a modified nucleotide named CAP joined to the 5' end, and a polyA (poly Adenine) tail at the 3' end before the now matured mRNA gets out of the nucleus to the cytoplasm.

At this point, the mRNA will be recognized by ribosomes, which will synthesize each group of three nucleotides (codons) into amino acids in a process called translation, by the action of tRNA, and finally joined into a new protein.

Note that A, P, and E are sites of the ribosomes, being A the position where first arrives the mRNA.

The observation for the student #2 must starts by the claim, going to evidence, and finishing with the reasoning.

1 - Claim = To the grass (producer) is easier to acquire nergy than it is for a hawk (quartenary consumer), because the base of the food pyramid is where most of the energy of the food chain is maintained, and the producers are able to produce their own food from the natural resources in the environment;

2 - Evidence = The food web in the picture shows how the trophic levels are distribute in the ecosystem, being the food pyramid divided into: producers (autotroph organisms), consumers (primary-herbivores, secondary-omnivore, and tertiary-carnivore), predators, preys, and decomposers. The graph shows that from each levels a small quantity of energy is lost by the organisms, going from the levels with more energy (plants- that uses the sun to make photosynthesis) until the tertiary consumer (the pradator - hawk, that is a heterotroph). To have energy the plants need only to be in a good place, while the hawk have to go after preys and an environment that have a good balance between the trophic levels;

3 - Reasoning = The student #2 came to the conclusion that is much difficult for the hawk to obtain energy because of the observation of the challenges for each level tropic level being bigger and bigger. That's because the way that each organism get their food and what it eats is a determinant factor, as well the loss of energy to complete the most basic functions. Being the conclusion that the grass that just need sunlight and water have a lot less difficults and energy loss than a hawk that needs to hunt for food, survival, reprodutive needs and so on.

The warmest climate is A because in this classification type A is the one that includes tropical climates (this climate extends northward and southward from the equator).

The surface that only vacuum metal deposition can  be used on is option  B: Non-porous surfaces.

Nonporous materials are substances that do not permit the passage of liquid or air. Nonporous materials are those that are not porous, such as glass, plastic, metal, and varnished wood.

Note that  Vacuum lifting nonporous materials is much simpler than vacuum lifting porous surfaces, as the definition suggests. A proven method for creating latent fingerprints on non-porous surfaces is vacuum metal deposition (VMD).

Therefore, A variety of displays, such as flexible plastic packaging, plastic bottles, glass, and others, respond best to vacuum metal deposition (VMD).

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Endocrine glands are organs connected to the lymphatic system and are in charge to produce hormones.

The answer is D

The rate of cell division over time is calculated as an average for the entire meristem by dividing it with the total cell flux. Total cell flux may be characterized as the number of cells in the meristem.

Cell division may be defined as a type of biological process through which a parental cell divides into two or more daughter cells. There are two types of cell division are there:

According to the context of this question, the availability of the nutrient plays an active role in the process of cell division. It can increase the population of cells by doubling the rate of promoting growth and division of respective cells.

Therefore, the rate of cell division over time is calculated as an average for the entire meristem by dividing it with the total cell flux.

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The male and female reproductive parts in plants are different in terms that the female plants (pistiliate) possess a functional pistil but lack stamens, while the male plants (staminate) contains stamens, but no pistils. Therefore the complete flower structure have stigma, style, pistil, stamen and the other acessory parts of the reproductive system, while a imperfect (pistillate) flowers don't have a stamen. According to the question and the information above the correct alternative to differenciate the gender of that plant flower is A. stamen.

Answer: The process by which green plants and some other organisms use sunlight to synthesize from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Answer: Molecular Weight of 4C2H6

120.2762 g/mol

The molar mass and molecular weight of 4C2H6 is 120.276.

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Answer:

it produces two (2) daughter cells

Answer: photosynthesis

Explanation:

photosynthesis

Plants use energy from sunlight to turn water and carbon dioxide into an energy-rich sugar called glucose. This process is called photosynthesis, which means “making things with light”. Photosynthesis takes place inside capsules in the leaf cells, called CHLOROPLASTS.

Genetic flow is a mechanism of evolution wherein allele frequencies of a populace extrude over generations because of chance .

Genetic flow happens in all populations of non-endless size, however its outcomes are most powerful in small populations. Genetic flow can also additionally bring about the lack of a few alleles (together with useful ones) and the fixation, or upward thrust to, percent frequency, of different alleles.

Genetic flow could have main outcomes while a populace is sharply contracted via way of means of a herbal disaster (bottleneck effect) or while a small institution splits off from the principle populace to determined a colony (founder effect).

In an countless populace, we anticipate directional choice to sooner or later restoration an effective allele, however this could now no longer always manifest in a finite populace, because the outcomes of waft can triumph over the outcomes of choice if choice is susceptible and/or the populace is small.

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Earth's distance and tilt affect the relative amounts of solar radiation regions receive.

Earth's distance and tilt affect the relative amounts of solar radiation regions receive. There are no options provided in the question, but this is the correct answer. The earth's orbit is not circular and the earth rotates in a tilted orbit. Whenever the south pole is tilted towards the sun, then the south pole will get more solar radiation than the north pole. The Earth absorbs most of the energy reaching its surface and a small fraction is reflected. In total, approximately 70% of the incoming radiation is absorbed by the atmosphere and the Earth's surface while around 30% is reflected back to space and does not heat the surface.

Answer:

The human body wants blood glucose (blood sugar) maintained in a very narrow range. Insulin and glucagon are the hormones which make this happen. Both insulin and glucagon are secreted from the pancreas, and thus are referred to as pancreatic endocrine hormones. The picture on the left shows the intimate relationship both insulin and glucagon have to each other. Note that the pancreas serves as the central player in this scheme. It is the production of insulin and glucagon by the pancreas which ultimately determines if a patient has diabetes, hypoglycemia, or some other sugar problem.

The complete chart indicating the number of chromosomes after meiosis, in body cells, in gametes and after mitosis are indicated in the given image.

Meiosis is the process of cell division in which the number of chromosomes are reduced to half. This is the reason why it is also called the reductional division. The process occurs in two phases: Meiosis I and Meiosis II. Meiosis I is the phase where actual reduction takes place.

Mitosis is the process of cell division where the daughter cells are identical to the parent cell. Here, the number of chromosomes remain the same and hence is called equational division.

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Water may pass readily across a semipermeable membrane, but solute cannot. Water travels to the solution side as the membrane divides pure water on the right from solution on the left. Osmosis is the cause of this water flow.

Osmosis is the net movement of water across a membrane that is permeable only to certain substances, and it is caused by the concentrations of different solutes on each side of the membrane.

Osmosis is the mechanism through which water diffuses across cell membranes. Osmosis is the process by which water moves from one region of low solute (dissolved material) concentration to another region of high solute concentration through a semipermeable membrane.

Osmosis is the process through which water diffuses across a semipermeable membrane based on the gradient of water concentration across the membrane. Osmosis simply moves water over a membrane, whereas diffusion moves materials both inside cells and across membranes.

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If the mating of 2 black guinea pigs produced 29 black and 9 white offspring, the genotypes of the parents would be heterozygous.

Expected phenotype ratio = 3:1 black to white

Expected genotypic ratio = 1 AA:2Aa:1aa

The mating of 2 black guinea pigs produced 29 black and 9 white offspring. The parents must be heterozygous.

Assuming the allele for the black trait is A while that of the white trait is a. The cross is between Aa and Aa.

    Aa    x    Aa

AA   Aa   Aa   aa

The black allele is assumed to be dominant over the white allele. Thus:

Phenotype ratio = 3:1 black to white.

The ratio of the offspring produced from the mating is 29 black to 9 white, which is roughly 3:1. Thus, the mating is between two heterozygous black individuals.

Expected phenotype ratio = 3:1 black to white

Expected genotypic ratio = 1 AA:2Aa:1aa

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Living in rural environments can be difficult due to the distance from the major centers and amenities of urbanization, since the way in which the human pecies has adapted to live in a community is direct linked to technologies that are sometimes nor available in a rural region. The lack of diversity of functions can also become a hindrance, since the rural region have agricultural activities or related to agriculture as the marjor, or in some cases the only, possibility of branch of work.

To the environmental the increase in people living in a rural region is the increased comsumption and exploitation of local natural resources, as well as the urban expansion for housing construction and other infrastructures. The population growth in the region can inevitably leads to climate changes and modifications in the fauna and flora.

Budding produces more yeast by: (2) Budding splits the DNA of yeasts in two separate cells.

Budding is among the forms of asexual reproduction where only one parent is required to give rise to daughter cells and no formation of gametes occurs. In budding, a small projection comes out from the parent body which eventually grows into an adult and separates from the parent body.

Yeasts are the eukaryotic unicellular species. They belong to the kingdom fungi. There are several species of yeasts in existence. The major use of yeasts can be seen in baking and making of alcoholic beverages.

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Answer: B

Explanation:

The most seismic activity occurs in earthquakes .

Seismic waves are caused by the sudden movement of things that are present within the Earth, also considered as fault during an earthquake. Other reasons may includes Volcanic eruptions, explosions, landslides, avalanches, and even rushing rivers can also cause seismic waves.

For example The Ring of Fire is a string of volcanoes and sites of seismic activity, or earthquakes, present at the edges of the Pacific Ocean. Mainly  two types of plate boundaries that produce volcanic activity are divergent plate boundaries and convergent plate boundaries. Divergent Plate Boundaries the tectonic plates move apart from one another.

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A prophage is a viral genome that infects bacterial cells, thus it integrates into a bacterial genome; while a provirus is a viral genome that integrates into an ekcaryotic genome.

Answer: Jupiter

Explanation:

Jupiter has the greatest mass when compared with the other planets in the solar system. According to the attached gravity formula and considering the only variable is the mass of the planet in this example then it has the greatest gravitational force.

A recession may be defined as A.6 quarters of declining GDP

Recessions are times of economic collapse that are indicated by rising unemployment, falling stock prices, and a decline in the housing market.

A recession is characterised as a protracted period of real GDP (output) growth that is weak or negative and is accompanied by a considerable increase in the unemployment rate. A recession also weakens a lot of other economic activity indices.

In simple words, a recession occurs when the economy's performance declines over a protracted period of many months, as seen by a reduction in GDP, an increase in the unemployment rate, and decreased consumer expenditure. A recession may have a huge influence on people's daily life.

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