13.
Which is the most accurate statement?

Sucrose digestion probably requires a different enzyme than lactase. Lactose-intolerant individuals only lack the lactase enzyme but may still produce the enzyme for digesting sucrose.

One molecule of glucose and one molecule of fructose make up sucrose, also referred to as table sugar. Polysaccharides, which are sugars made up of two or more molecules, include sucrose and are connected by a glycosidic bond, a unique chemical connection that holds carbohydrates together. Despite being digested, absorbed, and metabolized separately, glucose and fructose both produce the same final product, which your body utilizes as fuel.

Before the sugar enters the small intestine, sucrose digestion does not start. Because polysaccharides cannot be absorbed in their natural state, sucrose must first be broken down into its constituent sugars. One molecule of water is required for every molecule of sucrose to help break the glycosidic link and separate the molecules of glucose and fructose through a process known as hydrolysis. But this response happens naturally very slowly. This process is accelerated by the enzyme sucrase, which is present in the small intestine.

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The plant roots containing nitrogen fixing bacteria are

Plants of the Pea Family known as legumes, are some of the most important hosts for nitrogen-fixing bacteria, but a number of other plants can also harbour these helpful bacteria.

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Answer:

Explanation:

The change in the percentage of light colored moths and dark colored moths between 1850 and 1900 is a result of industrial melanism, a phenomenon in which the frequency of dark-colored individuals increases in a population over time in response to increased levels of pollution and soot. During this period, the population of light colored moths, which were once abundant, began to decline as the dark colored moths, which were previously rare, began to increase in number. This change was due to the increased visibility of the dark colored moths, which were better able to blend in with the dark soot-covered trees and avoid being preyed upon by birds.

Between 1950 and 2000, the trend of industrial melanism continued, but at a slower rate. The dark colored moths remained more numerous than the light colored moths, but the difference between the two populations became less pronounced as environmental regulations reduced the levels of pollution and soot in the environment. The decrease in industrial melanism is a testament to the effectiveness of environmental regulations in protecting biodiversity and restoring the balance of ecosystems.

In conclusion, the change in the percentage of light colored moths and dark colored moths between 1850 and 1900 was a result of industrial melanism, while the change between 1950 and 2000 was a result of both industrial melanism and the success of environmental regulations.

Answer:

A subscript is used only when more than one atom of a given type is present.

Explanation:

Molecular formulas are written with an index in the lower right corner. The index indicates the total number of atoms of one chemical element that is part of a molecule.

In the molecular formula of a compound, the coefficients can be different and that means that we have a different number of molecules of the same compound, but the indices cannot be different, because then it is no longer the same compound.

Answer:

its A &B

Explanation:

The F2 generation of dwarf violet would be 3/16.

C is the correct answer.

This dihybrid cross is usual. Due to the homozygosity of both parents, two distinct types of gametes—TV and (tv)—will be produced. The genotype (TtVv) will be heterozygous in the F1 plant. The F1 plants produce four different types of gametes: (TV), (TTV), (tTV), and (tTV).

The ratio of phenotypes in the F2 progeny is 9:3:3:1. One (TTvv) and two (Ttvv) of these dwarf plants had violet, making a total of three recombinants that are produced three times per sixteen progenies.

A mating experiment between two organisms that are equally hybrid for two traits is referred to as a dihybrid cross. A heterozygous organism is one that possesses two distinct alleles at a certain genetic location, making it a hybrid.

A phenotypic ratio is a numerical comparison of two phenotypes that demonstrates how frequently the occurrence of one trait corresponds with another. The phenotypic ratio produced from a test cross is used by researchers to determine the gene expression for generations of an organism.

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The  features make h2o a polar molecule :

a) The molecule has an uneven distribution of electron density.

d) The electrons are distributed unevenly within each bond of the molecule.

e) The molecule has a bent molecular shape.

A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms. The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be a highly polar molecule. Certain chemical species, such chains of carbon molecules, are believed to be nonpolar molecules because they exchange electrons evenly.

A molecule is often classified as polar or nonpolar based on the total of all of its bonds taken into account. There is a certain electronegativity for each element. The atom with the higher electronegativity will often draw more electrons when it is linked to another atom.

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Full Question: Which features make H2O a polar molecule? Select all that apply.

a) The molecule has an uneven distribution of electron density.

b) The molecule is electrically charged.

c) Each H2O molecule has a different shape.

d) The electrons are distributed unevenly within each bond of the molecule.

e) The molecule has a bent molecular shape.

Answer:

C. chemical weathering

Explanation:

took test on edge 2020

Answer:The germination process is commonly regulated by many abiotic factors, both individually and interactively, and these include light, temperature, pH, burial depth, soil salinity and moisture.

Explanation:

Post-translational control refers to the regulation of gene expression after translation. This process involves modifying or altering the synthesized protein to ensure proper function, stability, and localization.                                            

The process of post-translational control refers to the regulation of gene expression after translation. It involves modifications to the newly synthesized protein that can affect its stability, localization, and activity. This can include adding or removing chemical groups, folding or unfolding the protein, or targeting it for degradation. Post-translational control allows cells to respond quickly to changes in their environment and adapt to different cellular states.
 It is a crucial step in controlling gene expression as it enables the cell to fine-tune protein activity in response to various signals and environmental conditions. Some common post-translational modifications include phosphorylation, glycosylation, and ubiquitination.

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The centers for the control of heart rate, respiration, and blood pressure are located in the  medulla oblongata. The medulla oblongata is the most caudal structure of the brainstem. It controls heart rate, blood pressure, and respiration through the vagus nerve.

The lower portion of the brainstem is made up of a long, stem-like structure called the medulla, also known as the medulla oblongata or just medulla. In relation to the cerebellum, it is anterior and somewhat inferior. Autonomic (involuntary) processes, including as vomiting and sneezing, are controlled by this cone-shaped neural mass. The autonomic functions of breathing, heart rate, and blood pressure, as well as the sleep-wake cycle, are all controlled by the cardiac, respiratory, vomiting, and vasomotor centres found in the medulla.

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The process that links the physical sensory world and the brain for each of the senses (vision, hearing, taste, smell, and touch) is known as transduction.

Here's how transduction works for each of the senses:

1. Vision: The eye transduces light energy into neural impulses, which are then transmitted to the brain via the optic nerve.

2. Hearing: The ear transduces sound waves into neural impulses, which are then transmitted to the brain via the auditory nerve.

3. Taste: Taste buds on the tongue transduce chemical signals from food into neural impulses, which are then transmitted to the brain via the gustatory nerve.

4. Smell: Olfactory receptor cells in the nose transduce chemical signals from odors into neural impulses, which are then transmitted to the brain via the olfactory nerve.

5. Touch: Sensory receptors in the skin transduce physical pressure, temperature, and pain into neural impulses, which are then transmitted to the brain via various sensory nerves.

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Answer:

Explanation:

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

Answer:

NBT stands for national benchmark tests

NBT stands for National Bench Mark Test.

NBT is a short abbreviation for National Bench Mark Test. These are assessments for first-year applicants into higher education institutions.

The test is used to select the  most suitable and qualified candidate into first year program in higher education institutions.

Thus, NBT stands for National Bench Mark Test.

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Answer:

Land breeze, a local wind system characterized by a flow from land to water late at night. Land breezes alternate with sea breezes along coastlines adjacent to large bodies of water. Both are induced by differences that occur between the heating or cooling of the water surface and the adjacent land surface.

Explanation:

Answer:

A land breeze

Explanation:

Answer:

lysosomes→recycling shop

ribosoms→assembly shop

Explanation:

I have the same question all I know is that

This measurement, 6.410102 , is from scientific notation to standard notation.  The answer will be 6.41

Scientific notation is a way of writing numbers in two parts:

Only the figures (with the decimal point after the first digit), followed by × 10 to the power that moves the decimal point where you should be (that is, showing how many positions the decimal point moves).

On the other hand, the standard notation is the one that is normally used for not-so-large numbers by putting one digit behind another.

Thus, The answer will be 6.41.

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It is possible for anaerobes to be involved in bite wound infections due to the specific conditions present in these types of wounds.

Most bite wounds occur on the hands or fingers, which have little tissue and few blood vessels, creating an environment that is fairly anaerobic. Additionally, facultative anaerobes present in the wound can reduce the available oxygen in the affected tissue, further creating anaerobic conditions that are favorable for anaerobic bacteria to thrive. While tissues in the body are generally well-oxygenated, bite wounds can disrupt this balance and create conditions that allow anaerobes to multiply.

This can lead to the development of infections that require specific treatment, such as antibiotics that target anaerobic bacteria. In summary, while anaerobes may not be present in all types of infections, they can certainly play a role in bite wound infections due to the specific conditions that are present in these wounds.

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Answer: it will be the second one.

Explanation:

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Answer:

Explanation:

When cattle are processed, the most likely use for the animals' fat is for the production of tallow. Tallow is a rendered form of animal fat that can be used for various purposes such as making soap, candles, and cosmetics. It is also used in the production of food products such as fried foods and baked goods. In addition, tallow is used in the manufacturing of industrial products such as lubricants, biodiesel, and as a feedstock in the production of oleochemicals used in the manufacture of plastics, detergents, and other products. It is also used in the production of leather and upholstery, although these applications are not the primary use for cattle fat.

Surface water is typically saltiest near the coast rather than in the middle of the ocean.

The salinity of surface water is influenced by various factors, including evaporation, precipitation, and freshwater input from rivers. Near the coast, there is often a higher concentration of salts due to limited freshwater input and high evaporation rates. Evaporation causes water molecules to escape, leaving behind the dissolved salts, thus increasing the salinity. Additionally, coastal areas may experience higher levels of evaporation due to warmer temperatures and stronger sunlight. This combination of factors leads to a higher salinity near the coast compared to the middle of the ocean.

However, it is important to note that salinity levels can vary depending on specific coastal characteristics and regional factors. For example, along the coast of California, the water can sometimes be unusually salty due to specific oceanographic conditions. These conditions may include upwelling events, where cold, nutrient-rich waters from the deep ocean rise to the surface. These upwelling events can bring in water with higher salinity, resulting in temporary increases in coastal salinity levels.

Understanding the factors influencing coastal salinity is crucial for various reasons, including ecosystem health, water management, and the impacts of climate change. By studying and monitoring salinity patterns, scientists can gain insights into ocean circulation, climate dynamics, and the distribution of marine organisms.

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Osmosis and diffusion are two essential processes that happen in our body. Both the processes have certain similarities that are as follows:

Both allow solute molecules to move across a semipermeable membraneBoth move molecules from areas of high concentration to areas of low concentration. Therefore, option (D) is correct regarding the similarities between osmosis and diffusion. It is also essential to note that osmosis and diffusion differ in the types of molecules being transported and in the direction of transportation. In diffusion, all types of molecules and particles can move, while in osmosis, only water molecules can move.

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Answer:

C. Sepal

Explanation:

The flower of a plant is the reproductive structure of that plant where all reproductive activities of the plant takes place. However, some structures in the flower performs respective duties to aid this reproduction process. One of those structures or parts of a flower is the SEPAL

The sepal is a usually green external part of a flower that functions to protect some of the other reproductive structures in flowers e.g petals, due to its thick epidermis. Note that, the collection of sepals in a flower is called CALYX

True, Meiosis is referred as transfer of of genetic code from parent to offspring

Human typically have 46  chromosomes in each cell of their body made up of 22 pairs of chromosomes and 2 sex chromosomes. These chromosomes contain between 22000 to 25000 genes new gene are being identified all the time .

people usually have two copies of each chromosomes 1 copy is inherited from their mother (via the egg) and other from their father (via the sperm).A sperm and an egg each contain one set of 23 chromosomes . when the sperm fertilizes the egg , two copies of each chromosome are present ( and therefore two copies of each gene) and so an embryo is formed by the process of meiosis.  

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The diameter of a capillary tube is 2.5135m

Capillary tubes are those with very small diameters (narrow cylindrical tubes). When these small tubes are immersed in a liquid, the liquid in the capillary either rises (or lowers) relative to the surrounding liquid level. This phenomenon is known as capillary action, and such tubes are known as capillary tubes.

Rise in capillary is given by

h = \(\frac{2\times \sigma \times cos\theta}{\rho \times r\times g}\)

σ = surface tension

ρ = density of liquid

r = inner radius

h = height

θ = contact angle made by the liquid meniscus with the capillary’s surface.

Given,

h = 1.21 cm

σ = 540 × 10 N/m

θ = 140°

ρ = 13.6 × 10³ Km

Substituting the value in equation,

h = \(\frac{2\times \sigma \times cos\theta}{\rho \times r\times g}\)

r = \(\frac{2\times 540\times10\times cos140}{13.6\times10^3\times1.21\times10^-^2\times10}\)

r = 50.27 × 10⁻¹m

d = 2.5135m

The diameter of a capillary tube is 2.5135 m.

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Answer:

A

Explanation:

The genotype TT stands for the homozygous state, in which both alleles of a gene are present in a homologous pair. Alleles are various variations of a single gene.

If an organism possesses 2 versions of the same allele for a gene, it is said to be homozygous. An organism might be homozygous recessive (RR) or homozygous dominant (TT) (tt). A heterozygous creature is one that has two different alleles (Tt) for the same gene.

The presence of two identical alleles at a specific gene locus is referred to as the homozygous condition. A homozygous genotype can have two alleles with the same variance or two normal alleles.

A person is considered to be homozygous if they have two equal copies of a particular gene. A genotype with heterozygosity, on the other hand, possesses distinct alleles.

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Hair that has been treated with a hydroxide relaxer is unfit for curling and will not hold a curl.

Hydroxide relaxers are permanent chemical treatments that straighten and relax the hair. This process breaks down the structure of the hair and coats it with a chemical residue, which can make it difficult to style. As a result, the hair will not hold a curl.

The relaxer prevents the hair from curling because the chemical residue makes it difficult for the curl to take hold, and even if it does, the curl will not last long. Hydroxide relaxers also make the hair more brittle, which can further decrease its ability to hold a curl.

Additionally, the chemicals used in the relaxer can create buildup which can also weigh down the hair, preventing it from curling. All of these factors make it difficult for hair that has been treated with a hydroxide relaxer to hold a curl.

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