PLEASE HELP(this question has been asked a lot of times by other people with no good answers.)

1. Which of the following statements about classification of organisms is true?

A: Phylogenetic classification uses genetics and ancestral relationships to classify organisms.

B: The Linnaean system of classification takes into account ancestral relationships between organisms

C: Linnaeus concentrated on the genetic characteristics of organisms to classify them.

D:In phylogenetic classification, the group that organisms are put into is called a taxon.

Answer:

ljfkrejdmnc bdkcbkjdbjckbdkj idbb b  b b

Explanation:

Biological molecules are involved in the process of life. The research material that enables understanding of the biological molecules and their analysis can be accessed from library databases and research tools.

Biological molecules have been defined by the organic and inorganic compounds that are present and function in the living cell. They are considered the fundamental unit of life that consists of "carbon, oxygen, hydrogen, sulfur, and nitrogen molecules".

The online research tools and library databases of various research universities are the best places where one can access the research materials and information that allows the understanding of the importance of the biological molecules and the tests used to identify them.

Therefore, libraries and databases are used to get research information.

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Answer:

humans go through lactic acid fermintation,fermentation, the body needs energy in a hurry...hope thos helps

Answer :student 2

I had the same question in my test

Answer:

Proteins and lipids

Explanation:

These 2 are the main organic compounds used.

Scientists have very little knowledge about the Precambrian eon because there are very few fossils from that time.

The Eon in the Precambrian means "before the Cambrian era." It is used to define the entire period of the Earth's history which existed before the discovery of the oldest rocks which have identifiable fossils in them.

The organisms which existed during the Pre-Cambrian eon were basically soft-bodied and therefore there very few animals of that time which had bones, skeletons, or hard shells and so an existence of very less number of fossils have been found from that time. The time period was so long ago that the natural activity on earth like subduction of continental plates, volcanic action, erosion, etc. washed out the most of what was then the Earth's crust.

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The activity of the direct downstroke flight muscles of Locusta migratoria during steering behavior in flight is related to patterns of time shift. This means that the timing of muscle activation plays a crucial role in the steering behavior of locusts during flight.

When a locust is flying, it needs to adjust its wing movements to change its direction. This is achieved by activating specific flight muscles at different times. The direct downstroke flight muscles are responsible for generating the downward stroke of the wings, which provides the main thrust during flight.
To steer, the locust adjusts the timing of muscle activation in these direct downstroke flight muscles. By activating specific muscles at different times, the locust can change the angle of its wings and produce different forces on each wing, resulting in a change in direction.
For example, if the locust wants to turn left, it may activate the left direct downstroke flight muscles slightly earlier than the right ones. This would result in a stronger downward stroke on the left wing, causing the locust to turn left.
In summary, the activity of the direct downstroke flight muscles of locusta migratoria during steering behavior in flight involves adjusting the timing of muscle activation to change wing movements and steer in different directions.

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Answer:

The answer is C

Explanation:

Whenever a cell divides, it's always a carbon copy of the cell it originates from.

Answer:

C

Explanation:

Answer:

1) Aerobic respiration : In this case pyruvate is broken down into water and carbon dioxide along with release of energy. It commonly occurs in mitochondria of cells.

2) Anaerobic respiration in yeast : In yeast cells during fermentation pyruvate is converted into ethanol and C02 in the absence of 02

Explanation:

Answer:

1) Aerobic respiration : In this case pyruvate is broken down into water and carbon dioxide along with release of energy. It commonly occurs in mitochondria of cells. 2) Anaerobic respiration in yeast : In yeast cells during fermentation pyruvate is converted into ethanol and C02 in the absence of 02

2)Anaerobic respiration in yeast : In yeast cells during fermentation pyruvate is converted into ethanol and C02 in the absence of 02.

3) Anaeorbic respiration in muscles: Due to lack of oxygen, eg. during vigorous running or exercise, in human muscles, pyruvate is converted to lactic acid.

Explanation:

Hope this helps! :)

formation of maltose (malt sugar) from two molecules of glucose

_____________________________________________________

Answer:

Dehydration synthesis reactions are reactions in which molecules combine by the removal of a H atom and an OH group between them, which together form a molecule of water, H20. Therefore, a new molecule is synthesized while the reacting molecules lose a molecule of water (dehydration) between them.

For example, the formation of maltose (malt sugar) from two molecules of glucose is a dehydration synthesis.

A muscle fiber is stimulated with increasing frequency individual twitches be to summate if no relaxation occurs between twitches the contraction is called Fused tetany .

Fused tetanus is when the muscle fibers are not relaxed between stimuli and it occurs during a high rate of stimulation. A fused tetanic contraction is measured as strongest single-unit twitch in contraction. When tetanized, the contracting tension in the muscle remains constant in a steady state.

Fused tetanus  is caused by electrolyte imbalances most often low blood calcium levels. It's important to talk to your healthcare provider if you're experiencing tetany. They may  require immediate medical treatment.

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Answer:

D.) when its temperature changes from a solid to a liquid

Explanation:

At the melting point the solid and liquid phase exist in equilibrium.

Answer:

The purpose of mitosis is to make more diploid cells. It works by copying each chromosome, and then separating the copies to different sides of the cell. That way, when the cell divides down the middle, each new cell gets its own copy of each chromosome.

Answer:

The answer is D.

Explanation:

In conclusion, an imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. The three main body planes are sagittal, frontal, and transverse, each dividing the body into different sections to facilitate anatomical description and analysis.

An imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. Body planes are used as a reference to describe the position and direction of body structures. They help in understanding anatomical relationships and movements within the body.
There are three main body planes commonly used in anatomy:
1. Sagittal plane: This plane divides the body into left and right halves. It runs vertically from front to back, creating a right and left side. An example of a sagittal plane is the midline that separates the nose into two equal halves.
2. Frontal (coronal) plane: This plane divides the body into front (anterior) and back (posterior) portions. It runs vertically from side to side, creating a front and back side. For instance, a cut across the chest from shoulder to shoulder would be in the frontal plane.
3. Transverse (horizontal) plane: This plane divides the body into upper (superior) and lower (inferior) parts. It runs horizontally, creating an upper and lower section. A transverse plane could be represented by a line drawn across the waist.
By using body planes, medical professionals can accurately describe the location, orientation, and movement of body structures. Understanding these planes is essential for effective communication in healthcare and anatomical studies.
In conclusion, an imaginary line drawn through the body to separate it into sections and create directional terms is called a body plane. The three main body planes are sagittal, frontal, and transverse, each dividing the body into different sections to facilitate anatomical description and analysis.

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A. The rate would increase

Answer:

parthenogenesis I think

Answer:

parthenogenesis

Explanation:

Answer:

1. 10% 2. 90% 3. 80% 2. Yes 3. Into 3. Swell 6. Hypotonic

Explanation:

1. Given the image, it shows there is 10% glucose outside the cell.

2. Because there is 10% glucose outside the cell, you can automatically conclude that there is 90% of water outside. (You want it to equal to 100%. So, 10 + 90 = 100)

3. Given 20% glucose inside the cell based on the image, you can conclude that there is 80% water inside the cell.

2. Yes, osmosis will occur. Osmosis is the movement of water from a higher concentration to a lower concentration. In this case, there is more water outside the cell than in. So, yes, osmosis will occur.

3. The water will move into the cell (There's less water inside, and more outside, so of course, the water will move in).

3. The cell will swell, since water is getting moved in.

6. This is a hypotonic solution. Definition of a hypotonic solution: The concentration of solutes outside the cell is less than that of water. Hypotonic solutions always swell, as water moves into it.

Hopes this helps!^^ I tried the best I could at explaining.

An entity used for classification is a taxon (plural taxa). Species, genera, families, orders, classes, phyla (in animals), divisions (in plants), and kingdoms are examples of taxa at various levels of the hierarchical structure, in that sequence.

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Chemical barriers destroys the pathogen on the outer body surface , at body opening and on inner body lining .Sweat , mucus , tear and saliva all containing enzymes that can bacteria or pathogens . Urine too contains acidic for many pathogens and semen contains zinc  , which most pathogens cannot tolerate . In addition stomach acid kills pathogen that enters the GI  tract in food or water.

1. Saliva

  Saliva have enzymes that destroy bacterial cell by breaking down cell          wall. These enzyme are called lysozymes ,  which provide innate immunity , providing protection against  bacteria , virus and fungi.

2. Mucus

   The mucosal surfaces that form the boundary between the external environment and the underlying tissue are protected by mucus barrier . Mucin and Glycoproteins , both secreted and cell surface mucins , are major component of this barrier . They can  exclude pathogen and toxins while hosing the commensal bacteria.

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The main function of the capsid is to allow a virus to affix to hosts.

The capsid is the protein shell that encloses the nucleic acid of a virus.

Three functions of the capsid are:

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Complete question:

Capsid - The capsid is the protein shell that encloses the nucleic acid; Three functions:

1) it ----the nucleic acid from digestion by enzymes,

2) contains special ---- on its ----- that allow the virus to attach to a host cell, and

3) Allow virus nucleic acid,  -----  the host cell's membrane and, in some cases, to ---- the infectious nucleic acid into the cell's cytoplasm.

The lithosphere,which is the rigid outermost shell of the planet(the crust,and upper mantle),is broken into tectonic plates.The earth's lithosphere is composed of seven or eight major plates(depending on how they are defined)and many minor plates.In this way,the total surface of the lithosphere remain,the same.

The upper mantle, crust, and lithosphere, the planet's solid outermost shell, are divided into tectonic plates. Depending on how they are classified, the lithosphere of the earth is made up of seven or eight major plates as well as several lesser plates. The lithosphere's overall surface remains constant in this fashion.

In terms of plate tectonics, the lithosphere serves as the “plate.” Seismic waves enter the warm, plastic Asthenosphere at a slower speed in this "low-velocity” seismic zone, which denotes the base of the lithospheres. With a property known as plastic behavior, the Asthenosphere (weak sphere) is a component of the flowing Mantle.

Therefore, In plate tectonics, the Earth's lithosphere, which is composed of the crust and upper mantle, is divided into sizable rocky plates. These plates are situated on top of the asthenosphere, a rock layer that is still partially molten.

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Sydney's uterine tube scarring, which reduced the diameter by 75%, could lead to several potential effects. One significant impact is a higher risk of ectopic pregnancy, as the reduced diameter makes it difficult for a fertilized egg to pass through and implant in the uterus.

Additionally, the scarring may hinder the movement of sperm, making it harder for the sperm to reach the egg, thus reducing her chances of conception. This may ultimately contribute to fertility issues or even infertility in severe cases.

Lastly, if the uterine tubes become partially or completely blocked due to the scarring, Sydney may experience pelvic pain or an increased likelihood of infections. Overall, the scarring in her uterine tubes may impact her reproductive health and ability to conceive.

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Answer:

The diaphragm works together with the intercostal muscles of the ribs to help the alveoli by expanding the chest cavity, thus increasing the volume. As the volume of the chest cavity increases the pressure inside it drops, allowing air from outside the body to be pulled in and fill the lungs/alveoli.

The diaphragm helps the alveoli during respiration by creating changes in air pressure that facilitate the movement of air in and out of the lungs.

The diaphragm is a dome-shaped muscle located at the base of the chest cavity, separating the thoracic (chest) cavity from the abdominal cavity. During respiration, the diaphragm plays a crucial role in facilitating the movement of air in and out of the lungs.

When the diaphragm contracts, it flattens and moves downward, increasing the volume of the thoracic cavity. This expansion of the thoracic cavity lowers the air pressure within the lungs, creating a partial vacuum. As a result, air from the external environment, which has a higher pressure, rushes into the lungs through the airways and eventually reaches the alveoli.

Alveoli are small, thin-walled sacs located at the ends of the bronchioles in the lungs. They are the primary sites of gas exchange, where oxygen from the inhaled air diffuses into the bloodstream and carbon dioxide, a waste product, diffuses out of the bloodstream into the alveoli to be exhaled.

The movement of the diaphragm creates changes in pressure within the thoracic cavity, causing air to move into the lungs and reach the alveoli. As the diaphragm relaxes and moves upward, the volume of the thoracic cavity decreases, increasing the air pressure within the lungs. This higher pressure forces air out of the lungs and out through the airways during exhalation.

In summary, the diaphragm's contraction and relaxation create changes in air pressure that enable air to be drawn into the alveoli during inhalation and expelled from the alveoli during exhalation. This process facilitates efficient gas exchange between the alveoli and the bloodstream, allowing oxygen to be taken in and carbon dioxide to be eliminated from the body.

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Answer:

mRNA

Explanation:

DNA is too large to leave the nucleus, so it wouldn't be found in the cytoplasm. Since it says it takes messages from the control center, it most likely means the nucleus. mRNA literally stands for messenger RNA which transcripts DNA in the nucleus and then leaves it trying to find a ribosome for translation. Before it does though, it will be found in the cytoplasm.

The volume of Arwan’s piece of quartz is 303.42 cm³

Volume is described as a measure of occupied three-dimensional space or the amount of space that a substance or object occupies, or that is enclosed within a container.

Mass of the Quartz piece brought by Arwan = 788.9 g

Density of the quartz = 2.6g/ cm³

Density of the substance is described as mass present in per unit volume of the substance. It is measured in gram per centimeter cube.

Density = mass/volume

2.6 = 788.9/ volume

volume =  303.42  cm³ .

Density is denoted as mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.

Density has the units of measurement in mass divided by volume such as grams per centimeters cube (g/cm3) or kilograms per liter (kg/l)

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The complete question is:

Arwan finds a piece of quartz while hiking in the mountains. When he returns to school, he takes it to his science teacher. She helps him determine the mass to be 788.9 g. She also tells Arwan that the density of quartz is 2.6 . What is the volume of Arwan’s piece of quartz?

Antibiotics that attack the cell wall are considered bactericidal because a weakened cell wall leads to cell lysis. The cell wall provides structure and support for bacterial cells, and without it, they are unable to maintain their shape and integrity.

When an antibiotic targets the cell wall, it weakens it and causes it to break down, which in turn leads to the destruction of the bacterial cell. This process is known as cell lysis.
Cell lysis occurs because without the cell wall, the bacterial cell is unable to withstand the osmotic pressure that exists between the cell and its environment. This pressure causes the cell to burst, releasing its contents into the surrounding environment. As a result, the bacterial cell is unable to reproduce or carry out its normal metabolic functions, leading to its eventual death.
Antibiotics that attack the cell wall are particularly effective against actively dividing bacterial cells because they are more vulnerable to cell wall damage during the process of cell division. This is why cell wall-targeting antibiotics are often used to treat bacterial infections that are caused by rapidly dividing bacterial cells. Overall, antibiotics that attack the cell wall are considered bactericidal because they kill bacterial cells by causing irreversible damage to their cell walls, leading to cell lysis and eventual death.

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