Imagine that a volcano starts to emit a lot of gas and has an increase in shallow earthquakes, indicating that magma may be rising towards the surface. A couple of days later the activity ceases before an eruption occurs. Which of the following could explain why the activity shut off?
A)The rising magma encountered a very strong rock layer.
B)There was probably a large landslide on the volcano that increased the lithostatic pressure?
C)The number of bubbles in the magma increased and stopped the magma from rising.
D)The magma encountered water which made it stop erupting.

Answer:

The new model correctly shows the process of oxygen and carbon dioxide exchange that takes place in the capillaries. However, it does not show that this oxygenated blood travels back to the heart for distribution to the body. It also does not show the structure of the alveoli.

Explanation:

PLATO answer

The letter that indicates a structure that secretes a hormone that promotes maturation of gametes is A.

The reproductive system is the system of organs within an organism which work together for the purpose of reproduction.

The male reproductive system is mostly located outside of the body. These external organs include the scrotum and testicles etc.

The testicles is the major male reproductive organ responsible for the secretion of hormones and production of male gamete (sperm).

The structure in the above image that depicts the testicles is structure A.

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Answer:

Excretion

Explanation:

the characteristics of living thing are as follows Nutrition irritability growth excretion respiration movement reproduction and death. the only plausible answer is to be Excretion cos its excreted the waste that it produces hence excretion

Answer:A

Explanation:

Answer: A

Explanation:

Metaphase is when the chromosomes meet in a straight line down the middle! I like to think of it as “M”etaphase=“M”iddle. Both start with an “M”! Hope that helped.

Answer:

B. allows processes as growing and repair tissues in the body.

Explanation:

Mitosis is a process where a single cell divides into two identical daughter cells. During mitosis one cell divides once to form two identical cells and the dividing cell's chromosomes are copied and then distributed equally between the two new nuclei of the daughter cells.

The major purpose of mitosis is for growth and to replace worn out cells. It also plays an important part in the development of embryos.

Mitosis is divided into five stages:

1. Interphase- during interphase, the DNA in the cell is copied resulting in two identical sets of chromosomes. Microtubules also extend from the centrosomes outside the nucleus

2. Prophase- during this phase, the sister chromatids in each chromosome pair up, the nuclear membrane dissolves and the mitotic spindle consisting of microtubules and other proteins extend across the cell between the centrioles which move to opposite ends of the cell.

3. Metaphase- the chromosomes line up at the centre of the cell and the mitotix spindle attaches to eachmof the sister c hromatids.

4. Anaphase- the sister chtomatids are pulled apart to each end of the cell by the mitotic spindle.

5. Telophase- at each pole, a full set of chromosomes gather together, a membrane encloses each chromosome, the cell pinches at the middle and then divides into two. This is known as cytokinesis.

The difference between lactic fermentation and alcoholic fermentation is that lactic fermentation occurs in muscles while alcoholic fermentation occurs in sugars.

Fermentation is defined as a chemical or metabolic process that involves the breakdown of an organic substance in the presence of enzymes.

There are various types of fermentation which includes the following:

Lactic fermentation is the process that occurs in the muscle during strenuous activities and decreased oxygen. The end product of glucose metabolism which is Pyruvate, is converted to lactic acid by lactate dehydrogenase.

Alcohol fermentation is defined as the conversation of sugar into ethanol and carbondioxide.

From the above given definitions, it can be states that a clear difference between lactic fermentation and alcoholic fermentation is that the lactic fermentation occurs in the muscles while the alcohol fermentation occurs in food products that contains sugars.

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Answer:

Explanation:

Waxy cuticle is a white powdery substance that is insoluble, it is found usually on the surface of stem or leave and it prevent excessive loss of water through transpiration.

It is an adaptive mechanism used in dry areas or desert to help plants retain water that is needed for their growth by reducing amount of water loss through transpiration.

Cactus is an example of plant with cuticle that thrive well in dry areas

The complementary base pairing of DNA allows us to determine the sequence of one strand based on the sequence of the other strand. In this case, the sequence of the other DNA strand with the sequence ATCGATCGAT is TAGCTAGCTA.

The sequence of one strand of the DNA double helix can be used to determine the sequence of the other strand, since the two strands are complementary and have a specific base pairing. Adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

A pairs with T, so the first base in the complementary strand is T.

T pairs with A, so the second base is A.

C pairs with G, so the third base is G.

G pairs with C, so the fourth base is C.

A pairs with T, so the fifth base is T.

T pairs with A, so the sixth base is A.

C pairs with G, so the seventh base is G.

G pairs with C, so the eighth base is C.

A pairs with T, so the ninth base is T.

T pairs with A, so the tenth base is A.

Putting these complementary base pairs together, we get the sequence of the other DNA strand as TAGCTAGCTA.

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Answer:

The ratio of the mass of an oxygen atom to the mass of a hydrogen atom is therefore approximately 16:1. If we have 2 atoms of each element, the ratio of their masses is approximately 32:2, which reduces to 16:1—the same ratio.

The mass of oxygen compared to the mass of hydrogen is approximately 16:1.

There are several types of chemical reactions depending on the reaction mechanisms: combination, single-displacement, double-displacement, combustion, decomposition, combustion and redox reactions.

Thus, 16:1 is the answer.

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A second mutation that affects the translational machinery can produce a nonsense suppressor. With this mutation, the cell can respond to the nonsense codon by insertion of an amino acid, leading to a wild-type or nearly wild-type phenotype.

DNA undergoes nonsense mutations when a sequence change results in a stop codon rather than a codon that specifies an amino acid. The new stop codon leads to the creation of a truncated protein that is probably not functional.

In a procedure known as synthetic rescue, a suppressor mutation is a second mutation that lessens or reverses the phenotypic effects of an already existing mutant. Therefore, genetic suppression brings back the phenotype that existed before the original background mutation.

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Carbon dioxide is the main greenhouse gas emitted by human activities. Human activities include the burning of fossil fuels such as oil (gasoline) and coal. This gas is released into the atmosphere as complete combustion of fossil fuels is achieved.

We can conclude that the correct answer is:

D. CO2 (carbon dioxide), burning fossil fuels

Answer:

Proteins

Explanation:

These are all examples of proteins

As a protein, insulin is made up of two chains A and B each of these chains have 21 and 30 amino acids.

As a protein, haemoglobin has 4npolypeptides chains. Each of these chains have greater than 140 amino acids. The chains are attached to a heme group.

Albumin is also a protein. It's composition is about 69% of blood protein. It is made by the liver.

Maltose is a disaccharide

Answer:

TRUE

Explanation:

Answer:

Law Of Conservation Of Matter

Explanation:

The law of conservation of matter states that "Matter cannot be destroyed or created", considering how all atoms are made of matter, all a chemical reaction can do is rearrange them in different ways. Having unequal amounts will make this impossible.

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The statement is correct according to ~

" The law of conservation of mass "

The number of atoms in reactants should be equal to the number of atoms in products because, mass can neither be created nor be destroyed, the atoms can only be rearranged to form different compounds ~

Answer:

polygenic; multifactorial

Explanation:

A polygenic trait can be defined as any phenotypic feature of an organism that is controlled by the action of several polymorphic genes which interact with the environment to produce a given phenotype (i.e., they are multifactorial traits). The polygenic traits are controlled by many genes localized in different regions of the genome (i.e., loci) and exhibit a continuous range of variation, where each genomic region associated with the variation of the trait is called Quantitative Trait Locus (QTL). Some examples of polygenic/quantitative traits include, among others, height, hair color, weight, blood pressure, etc.

The correct answer is C. the light-independent reactions, where carbon dioxide is fixed and converted into organic compounds during photosynthesis.

The process of carbon dioxide fixation refers to the conversion of atmospheric carbon dioxide into organic compounds during photosynthesis. This occurs during the light-independent reactions, also known as the Calvin cycle or the dark reactions. These reactions take place in the stroma of chloroplasts, specifically in the chloroplasts of plant cells.

During the light-independent reactions, carbon dioxide molecules are combined with molecules derived from the light-dependent reactions, such as ATP and NADPH. The key enzyme involved in carbon dioxide fixation is called RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase). RuBisCO catalyzes the incorporation of carbon dioxide into an organic molecule called ribulose-1,5-bisphosphate (RuBP), which then goes through a series of reactions to produce glucose and other organic compounds.

In contrast, the light-dependent reactions, which occur in the thylakoid membranes of chloroplasts, involve the absorption of light energy and the generation of ATP and NADPH. These energy-rich molecules produced in the light-dependent reactions are subsequently used in the light-independent reactions to drive the carbon dioxide fixation and synthesis of organic molecules.

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The radiometric dating of sedimentary rock is not exact due to the fact that sedimentary rock is made up of weathered and eroded bits of other rocks, including igneous rocks.

Radiometric dating relies on measuring the abundance of radioactive isotopes and their decay products within a rock sample. However, in the case of sedimentary rock, the minerals within the rock are typically not the original components but rather fragments from different sources. These fragments may have different ages and could have undergone various geological processes before being deposited as sedimentary rock.

As a result, the different minerals and fragments within the sedimentary rock may have different isotopic compositions and ages. When attempting to date a sedimentary rock using radiometric methods, it becomes challenging to accurately determine the initial composition of the minerals and the timing of their formation.

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The retina is a complex layer of tissue in the eye that contains several distinct layers, each with its own important function.

These layers include the pigment epithelium, photoreceptor layer, outer limiting membrane, outer nuclear layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglion cell layer, optic fiber layer, and an inner limiting membrane.

The pigment epithelium is a layer of cells that is located between the choroid layer and the photoreceptor layer in the retina of the eye. It is responsible for absorbing excess light and preventing reflection, which helps to maintain the clarity of the visual image.

The photoreceptor layer contains two types of cells, rods and cones, which are responsible for detecting light and transmitting signals to the brain. The outer segments of the rods and cones are responsible for absorbing light, while the inner segments contain the cell's nucleus and other organelles.

The outer limiting membrane serves as a barrier between the photoreceptor layer and the cells above it.

The outer nuclear layer contains the nuclei of the rods and cones, while the outer plexiform layer contains synapses between the photoreceptor cells and the cells in the inner nuclear layer.

The inner nuclear layer contains the cell bodies of the bipolar cells, while the inner plexiform layer contains synapses between the bipolar cells and the cells in the ganglion cell layer.

The ganglion cell layer contains the cell bodies of the ganglion cells, which transmit signals to the brain via the optic nerve.

The optic fiber layer contains the axons of the ganglion cells.

The inner limiting membrane serves as a barrier between the retina and the vitreous humor.

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Answer:

protein

Explanation:

because it has many functions andreplaces most nutrients

a. Ryan’s interest after the four years is $131.44.

b. Ryan’s balance after four years will be $906.44

c. The interest Ryan’s account earn the first year is $32.86

d. The interest Ryan’s account earn the fourth year is $131.44

e. Brian’s interest after the first year is $32.86.

f. Brian’s balance after the first year is

From the information, Ryan deposits $775 in an account that pays 4.24% simple interest for

four years. The interest rate will be:

= (775 × 4.24% × 4)

= $131.44

Brian deposits $775 in an account that pays 4.24% simple interest for one year. The interest will be:

= (775 × 4.24% × 1)

= $32.86

Ryan’s balance after four years will be:

= $775 + $131.44

= $906.44

Brian’s balance after the first year will be:

= $775 + $32.86

= $807.86

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An abiotic factor is a non-living part of an ecosystem, including its physical and chemical aspects.

Examples of abiotic factors include:

Sunlight: It is the source of energy for plants and affects animal habits.

Temperature: It affects the life of every species, determining where they can exist, afects metabolic reactions and is determinant for the variation of plants and animals.

Atmosphere: It sustains life on earth protecting animals from UV radiation for example.

Humidity: it affects the internal balance of organisms.

Soil: It is a source of nutrients for plants, therefore its composition affects their functions

The depth of a body of water can also be considered an abiotic factor. It affetcs for example the type of species that can live there and it determines the preassure they would have to withstand.

Answer:

C

Explanation:

Due to constant erosion, it will erode and collapse from which sediments form which sink into the sea or float depending on its mass

If I am understanding correctly, the first thing they are asking you to do is match nitrogen bases.

Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).

Then, whichever are the double strands, cut them out and put them into you notebook. (I am not sure where the notebook is, but I am assuming you know)

Then in the speech bubble next to the picture of Chargaff- talk about his rule.

What does the rule mean?

What does the rule explain?

How is the rule demonstrated?

Lastly, finding percents. What percent of the pairs has Adenine in them?

For example:

If I look at this pairing below

A →T

T→ A

G →C

C→ G

50% of the pairs include Adenine.

Hope I helped! Comment if you have questions about my answer :)

Answer:

If the sequence of nitrogenous bases of a DNA strand is ATCTAGGCCG, the complementary strand would be TAGATCCGGC, with a percentage of guanine 30%, cytosine 30%, adenine 20% and thymine 20%, according to Chargaff's rule.

Explanation:

DNA is made up of sequences of nitrogenous bases, which are adenine (A), guanine (G), thymine (T) and cytosine (C).  The bases of one strand are matched with the bases of another, according to the complementarity of nitrogenous bases, where:

The image shows a DNA chain whose chain is complementary:

DNA Strand given      Complementary Strand

    Adenine                                Thymine

    Thymine                                Adenine

    Cytosine                                Guanine

    Thymine                                Adenine

    Adenine                                Thymine

    Guanine                                 Cytosine

    Guanine                                 Cytosine

    Cytosine                                Guanine

    Cytosine                                Guanine

    Guanine                                 Cytosine

Therefore, in a DNA molecule there is as much adenine as thymine, and an equal amount of cytosine and guanine. In this example there are 4 molecules of adenine, 4 molecules of thymine, 6 guanines and 6 cytosines.

The proportion or percentages of nitrogenous bases can be calculated according to Chargaff's rule.

Chargaff was able to establish that in a DNA molecule the ratio of purine:pyrimidine of 1:1, so there must be the same amount of thymine as adenine and a similar amount of guanine for the cytosine, according to the complementarity of bases.

Taking into account the law of the base pair, if in a DNA chain there is 30% of Adenine, in the molecule there is:

Guanine 30%

Cytosine 30%

Adenine 20%

Thymine 20%

Total ..... 100%

Answer:

Temperature of atmosphere: The Earth's temperature range in Fahrenheit is from 2,700 degrees Fahrenheit (1,500 degrees Celsius) in the uppermost atmosphere to a global average temperature of around 59 degrees Fahrenheit (15 degrees Celsius) near the surface.

Answer:

D

Explanation:

Population density is the number of individuals in a unit square area. As if population density increases in a population that is density-dependent, will increase immigration, i.e., option D.

Immigration is a process by which individuals become residents of another country permanently.

The process of immigration is of great importance for social, economic, and culture of states.

As population density increases in a population that is density-dependent immigration will also increase.

Thus, the correct option is D.

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