You would like to create an experiment at your house. You take a sample of E.coli bacteria from the toile
to see if they will grow faster if given different samples of food. You set up 3 samples. One sample of E.coli is placed
in milk, one sample of E.coli is placed on a piece of meatloaf, and one sample of E.coli is given nutrient agar, which
simulates normal laboratory conditions. After 2 days, you count 150 colonies of E.coli in the milk, 100 colonies in the
meatloaf, and 75 on the nutrient agar.
a. Based on this information, what conclusion(s) can you draw?
b. What is your controlled variable (constant)? The same sample item.
What is your independent variable?
What is your dependent variable?
e. What group represents the controlled group?_
f. If you were to graph this experiment, what information would you put on the x-axis and why?
g. What information would you put on the y-axis? Why?

Answer: Through the tricuspid valve, the heart moves oxygen-poor blood from the right atrium to the right ventricle. The blood is subsequently pumped by the right ventricle down the pulmonary artery to the lungs, where it enters the respiration process to absorb oxygen and expel carbon dioxide. The oxygen-rich blood then travels through the pulmonary veins back to the left atrium of the heart. Through the mitral valve, the left atrium delivers blood that is oxygenated to the left ventricle. The aorta, which divides into smaller arteries that carry blood to numerous organs and tissues, is how the left ventricle subsequently pumps the oxygen-rich blood to the rest of the body.

Answer:

D

Explanation:

Wave 2 and Wave 3 have the same amplitude.

It was observed in hershey-chase experiment of bacteriophages that radioactive phosphorous was found to be existing in the bacterial cell

Bacteriophages are viruses which infect bacteria. They do this by parasitizing bacteria and reproducing in them.

Interestingly, bacteriophages are usually, frequently and most of the times used in genetic research

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In the given equation, Ek represents the kinetic energy of an object.

Kinetic energy (Ek) is a form of energy associated with the motion of an object. It is dependent on both the mass (m) and the velocity (v) of the object.

The equation Ek = (1/2)m\(v^2\) represents the formula to calculate the kinetic energy of an object.

The symbol "Ek" is commonly used to represent kinetic energy in scientific calculations and equations. By plugging in the values of mass and velocity into the equation, one can calculate the amount of kinetic energy possessed by the object.

The kinetic energy of an object increases with both its mass and velocity. As the mass increases, the object has more particles in motion, contributing to higher kinetic energy.

Similarly, as the velocity increases, the speed at which the object moves also increases, resulting in greater kinetic energy.

Therefore, understanding and calculating kinetic energy is important in various scientific and engineering applications, such as studying the movement of objects, analyzing collisions, or designing efficient systems.

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Question

Look at the incomplete equation below. What does Ek represent?

Ek =----- x m x v2

BIOLOGY > HUMAN BIOLOGY > DIGESTIVE SYSTEM

EXPLANATION:

In the mouth, physical digestion of the food happens by chewing of the food. In the stomach, the food is broken down by chemical digestion into smaller particles that can be easily absorbed by the body. It will pass through the small intestine first where the microvilli and villi are. Then, most of the undigested and unabsorbed food particles are passed through the large intestine. It will be getting secreted out of the body after.

ANSWER: D. Duodenum is the first section of the small intestine right after the pyloric sphincter.

Most articles pass right through the atom, this means that most of the atom is an empty space.

An atom is described as a particle that consists of a nucleus of protons and neutrons surrounded by a cloud of electrons.

Protons and neutrons make up the core nucleus of an atom, which is encircled by an electron cloud. In relation to the size of the atom as a whole, the nucleus is exceedingly small.

As a result, the electrons surrounding the nucleus are the primary target of interactions when particles or even light pass through an atom. The majority of the atom's remaining space, which includes the nucleus, is vacant.

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Earth's biosphere is an outer covering of the earth. The geosphere is the place containing land and the hydrosphere is the place containing water, and they together make the biosphere.

Earth is a solid planet that is the third planet in the solar system. It is the only planet that contains life. Earth has only one natural satellite, which is the moon.

The biosphere is the outer covering of the earth. It protects the earth from outer things. It also has several layers, and it maintains the conditions and temperature necessary for living beings.

Therefore, the biosphere of the planet is its outer layer. The biosphere is made up of the geosphere, which is the area covered by land, and the hydrosphere, which is the area covered by water.

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Based on this mechanism of action, we can rule out the first two stages of aerobic cellular respiration, which are glycolysis and the citric acid cycle).

Rotenone is a pesticide that inhibits the activity of complex I in the electron transport chain of aerobic cellular respiration. As a result, the flow of electrons from NADH to complex III is blocked.

Glycolysis takes place in the cytoplasm of the cell and does not require oxygen or the electron transport chain. It is the breakdown of glucose to produce two molecules of pyruvate, two molecules of ATP, and two molecules of NADH.

Rotenone does not affect glycolysis because it inhibits the electron transport chain, which is a later stage of aerobic cellular respiration.

The citric acid cycle takes place in the mitochondria of the cell and requires oxygen and the electron transport chain to function. It is the breakdown of pyruvate to produce CO2, ATP, and NADH.

However, rotenone does not affect the citric acid cycle directly because it inhibits complex I, which is not directly involved in the citric acid cycle. However, without functional complex I, the NADH produced by the citric acid cycle cannot be oxidized to produce ATP through the electron transport chain, ultimately leading to a decrease in ATP production.

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Answer:

The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.

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The best description of originality is having a low probability, unique, option D is correct.

Originality refers to the quality of being novel and distinctive, and it implies that something is not derived from anything else. The more unique and uncommon an idea, creation, or expression is, the more original it is deemed to be. Originality can be measured by the probability of its occurrence.

The lower the probability of an idea or creation being generated, the more original it is. A highly original idea is not only new but also unexpected and unconventional, which makes it stand out from the norm. Originality is highly valued in fields such as art, literature, science, and technology, as it contributes to the advancement of knowledge and understanding, option D is correct.

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The correct question is:

What is the best description of originality?

A) nonobvious

B) special or interesting

C) convergent

D) having a low probability, unique

Answer:True

Explanation:

Carl von Linné, also known as Carolus Linnaeus, is well known for being the first to organize organisms in a hierarchy of taxonomic ranks. He also created the binomial nomenclature or the binomial system, in which each species is given a name with two words in latin: one related to its genus followed by another one related to the species (a specific name).

Answer:

Yes

Explanation:

Fjytdhtyfhhfhftuyi

Answer:

Explanation:

The particles of salt become so small, they spread evenly throughout the water. This clear mixture of salt and water will not separate by itself. Sand in water is also a suspension. If you shake a container of sand and water, the sand spreads through the water, forming a cloudy liquid.

Answer:

Option A

Explanation:

Thyroid is primarily caused by lack of iodine but there are other reasons as well that lead to increased size of the thyroid gland. Some of these reason is

a) over- or underproduction of thyroid hormones

b) Nodules in the glans

Some times, due to overstimulation immune system itself attack the thyroid gland thereby producing excess thyroxine and hence causing  the thyroid to swell

Thus, Option A is correct

Answer:

Organic fertilizers continue to improve the soil long after the plants have taken the nutrients they need. Therefore, the longer your soil is fed with organic fertilizers, the better its composition and texture. So, while inorganic fertilizer is cheaper in the short term, it adds less to the soil in the long term.

Bacteria reproduce by the process of A. Budding, which is an asexual mode of reproduction.

Budding cell division is a type of asexual reproduction in which a new organism grows from a small protrusion, or “bud,” that develops on the parent organism. In single-celled organisms, such as bacteria and other microorganisms (e.g. yeast), budding cell division may represent the primary form of reproduction.

Therefore, with this data, we can see that budding is the primary form of reproduction in unicellular organisms such as bacteria which are prokaryotic microorganisms.

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Answer: because the

Explanation: A flying airplane has potential energy has it flies above the ground level. And since the airplane is flying motion is associated with it and thus possesses kinetic energy.

The plane at 10,000 m will have more gravitational potential energy because it is directly proportional to height.

The energy stored by an object as a result of its position is called potential energy.

When an object is at a height, it is able to store gravitational potential energy. This energy is because of the attractive force of gravity acting on the object as a result of its height.

Gravitational potential energy is mainly dependent on two factors. These are - the mass of the object held at a height and the height at which it is held i.e the vertical distance between the object and the earth.

Gravitational potential energy is equal to

P E = m × g × h

Where m is the mass of the object

            g is the acceleration due to gravity

            h is the height

Therefore, gravitational potential energy is directly proportional to the mass of the object and the height at which it is held.

Since in the above case, we are talking about the same airplane so mass will be common. But at a height of 10,000m gravitational potential energy will be considerably higher compared to at a height of 1000 m.

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Answer:

The number of large fish will increase.

Explanation:

Answer: The answer is A

Explanation: Took the test lol

The quickest halt to the signal transduction process after IP3 production occurs through the hydrolysis of IP3 itself, as option A.

The hydrolysis of IP3 results in the quickest termination of the signal transduction pathway among the available alternatives. A series of actions are triggered by IP3, which causes the release of calcium ions from intracellular reserves. IP3 is hydrolyzed by phosphatases, which halts the calcium release and prevents protracted signaling.

Even while the hydrolysis of GTP and PIP2 is a necessary step in the cessation of G protein-coupled receptor signaling, it happens later and does not have the same rapid effects as IP3 hydrolysis. The hormone's own breakdown is not a known mechanism for halting signal transmission.

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Answer:

More quick and farther

Answer:

Energy is abiotic.

Explanation:

Sunlight is the main source of energy on Earth, which makes it an extremely important abiotic factor.

Biotic refers to all living things such as plants, animals, bacteria, fungi etc. Abiotic refers to all non-living parts of an ecosystem such as the sun, wind, soil, rain etc. So sunlight is an abiotic factor

DNA (Deoxyribonucleic acid) and RNA (Ribonucleic acid) are those molecules involved in the storage of our genetic information (DNA), but also in the production of amino acids for proteins (RNA).

Both molecules have a particular structure comformed by nucleotides, a pentose, and a nitrogenous base (Adenine, Thymine, Cytosine, Guanine for both, and Uracile for RNA, which replace Thymine when it replicates the information of DNA in mRNA).

Another difference between these molecules relies on a particular extra oxygen atom they have in a particular C position on the pentose (carbon ring), that in RNA is present, while in DNA not.

One of the main differences in these molecules is that DNA is only found in superior organisms, like animals, plants, or macroscopic fungi, while RNA is only found in other organisms like bacteria or virus, although RNA develops the function of replication in superior organisms.

Also, we could say that the molecule of DNA is a double-stranded molecule (conformed by two complementary strands from DNA), while RNA is linear in most cases, and also circular.

DNA differs too from RNA in that also DNA is packaged in our chromosomes with some proteins called histones, which compacts this molecule.

Answer:

the mass number is protons and nuetrons added together in the atomic nucleus.

Explanation:

Answer:

To calculate the minimum age of the Earth, we can use the fact that the amount of uranium-235 remaining after a certain number of half-lives is given by the equation:

N = N0 * (1/2)^n

where N is the current amount of uranium-235, N0 is the initial amount of uranium-235, and n is the number of half-lives that have passed.

If we assume that the initial amount of uranium-235 in the oldest rocks on Earth was N0, and that 1/64th of the expected amount is present, then the current amount of uranium-235 is:

N = N0 * (1/64)

We can set this equal to the amount of uranium-235 that would remain after n half-lives:

N = N0 * (1/2)^n

N0 * (1/64) = N0 * (1/2)^n

Dividing both sides by N0 gives:

1/64 = (1/2)^n

To solve for n, we can take the logarithm of both sides of the equation:

log(1/64) = log((1/2)^n)

Using the logarithmic property that log(a^b) = b*log(a), we can simplify the right side of the equation:

log(1/64) = n*log(1/2)

Dividing both sides by log(1/2) gives:

n = log(1/64) / log(1/2)

n ≈ 6

Therefore, 6 half-lives have passed since the initial amount of uranium-235 was present in the oldest rocks on Earth.

The age of the Earth can be calculated by multiplying the number of half-lives by the half-life time:

Age of the Earth = n * half-life time

Age of the Earth = 6 * 704 million years

Age of the Earth ≈ 4.2 billion years

Therefore, the minimum age of the Earth is approximately 4.2 billion years.

Many disorders are due to the inability of an individual to break down a particular chemical. A person who has a disease called phenylketonuria (PKU).

Which prevents them from breaking down the amino acid phenylalanine, this is one example of a person who is unable to break down a chemical in their body.

Giving a person the right enzymes can help treat these diseases. Chemicals in our bodies are broken down by enzymes, which act as biological catalysts.

Therefore, if a person is deficient in the right enzyme, that person can be cured by giving them that enzyme. Let's discuss the remaining options.

Antigens are dangerous foreign substances that have gotten inside the body. The genetic material is stored on chromosomes, which are found inside the nucleus.

Organelles are cellular structures, such as the mitochondria, nucleus, and endoplasmic reticulum, that have particular roles.

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Your question is incomplete, but most probably your full question was,

Many disorders are due to the inability of an individual to break down a particular chemical. Sometimes these disorders can be treated by giving the affected individual the appropriate

(1) enzymes

(2) antigens

(3) chromosomes

(4) organelles

Answer:

The correct answers are: B) Catalase works best at human body temperature, C) Normal human body temperature is 98.6°F, which equals 37°C.

Explanation:

Catalase is an enzyme found in our bodies that has the important task of breaking down hydrogen peroxide, a molecule that is very toxic. For catalase to work at its optimus speed, it need the body to have a temperature of 37° celsius -98.6°F-, which is what we normally call human body temperature. If the temperature rises or falls below body temperature, catalase will still work but at a much slower rate, until it stops working completely.

Not all enzymes work best at human body temperature, some enzymes reach their optimus state at higher or lower temperatures; but it is important to remember that enzymes are proteins, and proteins denaturalize when the temperature becomes to high, making them lose their shape and function.

Catalase is an important enzyme for organisms because it breaks down  hydrogen peroxide. The human body temperature (37ºC =98.6°F) is optimum for the enzyme activity. The correct options are b) and c).  

-----------------------------------------

ENZYMES

Enzymes are intracellular catalytic polypeptidic molecules that accelerate different natural chemical reactions.

They need to get an accurate tridimensional structure to accomplish their function.

There is a limited temperature and pH level at which they lose that structure and denaturalize.

The increase in temperature accelerates chemical reactions. As temperature increases, the reaction velocity duplicates.

The optimum temperature refers to the point at which the enzymatic activity is the highest. After this point, the enzymatic activity sharply decreases.

Over the optimum point, there is a loss of the catalytic activity, denaturalizing the enzyme.

CATALASE

In organisms, the catalase enzyme turns to be very important because it breaks down hydrogen peroxide, a toxic molecule.

The optimum temperature for catalase is 37ºC.

The enzyme breaks this toxic molecule down into many subproducts, cleaving the hydrogen bonds and producing water and oxygen.

As temperature increases, it turns easier for the enzyme to act on hydrogen peroxide.

However, when temperature exceeds 37ºC, the enzyme denaturalizes, having no effect on hydrogen peroxide.

Under normal conditions, the human body temperature is between 36.5 and 37ºC, which makes it ideal for good enzyme activity.

So, like many other organisms, humans use this enzyme to protect themselves from the toxic compound.

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If the first cause in a series of effective causes were to disappear, the subsequent causes would be rendered impossible.

The five proofs of Thomas Aquinas can be summed up as follows:

1. The motion we notice in the universe was started by God, who is the First Mover.

2. The effects we see in the universe have God as their primary cause.

3. God maintains the universe's existence.

4. God is the source of the universe's hierarchy of perfections.

5. The intelligence that directs nature is God.

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Answer:

they can involve biotic interactions like competition, predation, and disease, or abiotic factors like severe weather, flooding, drought, and fire. Most species appear to be limited in at least part of their geographic range by abiotic factors, such as temperature, moisture availability, and soil nutrients.

Explanation:

Tears and mucus membranes are a part of the first line of defense, which is a component of the innate external defenses.

The human body has a number of innate defence mechanisms that cooperate to ward off dangerous pathogens like bacteria and viruses. Innate external defenses, which are chemical and physical barriers that stop infections from entering the body, are the first line of defence. The skin, tears, mucous membranes, and stomach acid are among the body's natural exterior defences.

The body's largest organ, the skin, serves as a physical defence against viruses. Pathogen penetration is hampered by the skin's several layers of cells that are closely packed together.

Mucus membranes and tears are two additional physical barriers that keep infections out. The tear ducts in the eyes generate tears, which have enzymes and antibodies that can destroy microorganisms.

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