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Which experiment would most likely contain experimental bias?








A.

A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions.

B.

A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.

C.

A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each.

D.

A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same

water because it's a compound

Water is the only non-element in those choices. There are many ways to figure this out. If you had the periodic table accessible to you, just look on there. If you don't see something on it, it isn't an element. There are only 118 known elements in the world as of today. Another way to do it is to look at the hints that each of their symbols give you. The chemical symbol for hydrogen is H, water is H2O, argon is Ar, and uranium is U. The start of every symbol is a capital letter, so each element only has one capital letter. If there is more than one capital letter in a symbol, then you know there is more than one element inside of that chemical, meaning that it cannot be a pure element, and must be a compound or mixture. Hope that helped! Can I please have a brainliest? :)

Active transport requires energy and moves molecules against their concentration gradient, while passive transport does not require energy and moves molecules following their concentration gradient.

The fundamental difference between active and passive transport lies in the requirement of energy and the direction of molecular movement. Active transport requires energy, usually in the form of adenosine triphosphate (ATP), and moves molecules against their concentration gradient (low to high concentration). Examples of active transport include the sodium-potassium pump where sodium ions are pumped out of cells and potassium ions are pumped into cells, both against their concentration gradients.

On the other hand, passive transport does not require energy and moves molecules from areas of high concentration to areas of lower concentration, following their concentration gradient. Examples of passive transport include simple diffusion and facilitated diffusion.

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Answer: Glycolysis

The first stage of cellular respiration is glycolysis that takes place in the cytosol of the cytoplasm. Basically, in this process, the glucose splits up. The enzymes break down the glucose molecules into molecules of pyruvic acid. To split the glucose molecules energy is needed and that energy is provided by the molecules of ATP.

The kerbs cycle is the third stage of the cellular respiration. The pyruvic acid molecules that were produced in the first step i.e. glycolysis, enters the mitochondrion and starts the kerbs cycle. And the energy from the molecules is stored in 16 energy carrier molecules which includes four molecules of ATP’s as well.

Gel electrophoresis is a technique used to separate molecules like DNA, RNA, or proteins according to size and charge, by applying an electric field. The molecules move through a gel which acts as a sieve, allowing size-based separation, and the results are visualized using specific dyes.

Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge. The process involves using a gel as a filter to sort the molecules as they are forced through it by an electric field. Because nucleic acids and proteins have different charges under certain conditions, they will move through the gel at different rates. DNA, for example, possesses a net negative charge due to the phosphate groups along its backbone, making it migrate towards the positive electrode. Shorter DNA fragments move through the gel faster than the longer ones due to the gel's sieving effect, allowing for the separation based on size. After the electrophoresis, these separated fragments appear as bands on the gel which can then be stained with a specific dye to make them visible for analysis.

Answer: Basal surface is the surface of epithelial cell lies closest to its blood supply.

There are three surfaces in the epithelial cell.

1. apical

2. lateral

3. basal

1. Apical surface :  This is the surface which faces towards the cell and it is the exposed layer.

2. Lateral surface : This is the surface which is in between the adjacent cells.  

3. Basal surface :  It is divided into two lamina : Basal and Reticulate.

Basal lamina is made up of glycoproteins and collagen, this lamina remains separated from underlying connective tissue. Basal lamina is in attachment with Reticulate lamina.  Reticulate lamina is in contact with underlying connective tissues this arrangement forms a basal membrane for linking the epithelial surface with connective tissue layer or region of blood supply.

Answer: The surface of an epithelial cell which lies closest to its blood supply is called as the Basal surface.

Epithelial cell is primarily composed of two surface-

1) Apical surface- It is exposed to the environment and lies towards the lumen or internal organ cavity.  

2) Basal/ Basolateral surface- It is not exposed to the environment. It lies interiorly and attached to the basement membrane via integrin.

Epithelial cells do not have own blood supply. For obtaining nutrients, they are dependent on the blood capillaries which are present in the nearby tissues. For accomplishing this, the basal surface of epithelial cell plays an essential role. The nutrients from blood enters basal surface via basement membrane which is a selectively permeable membrane.

Thus, basal surface of epithelial cells lies closest to the blood supply.  

Answer:

Sample answer:

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Robber crabs eat other crabs, which likely controls the smaller crabs’ population. They also break down and digest plant matter in the ecosystem. That water pollution could negatively harm these crabs, especially if it occurs where young larvae live. Pollution could kill or harm some or all of the larvae, causing a drop in their population.

Robber crabs feeds on other crabs and control the smaller crabs’ population. It can be adversely affected by water pollution

it can also be referred as coconut crab and is the species of hermit crab.

These crabs can help to break down and digest plant matter present in the ecosystem.

Water pollution could harm these crabs, especially the young larvae. Pollution can kill or harm some of the larvae, causing a decrease in their population.

Thus, it can be concluded that robber crabs feeds on other crabs and control the smaller crabs’ population.

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Answer: the hair becomes club hair during the regression phase

Explanation:

Answer:

C6H12O6 + 6O2

Explanation:

The product is what the plant releases after photosynthesis. The chemical formula for glucose and oxygen is C6H12O6 + 6O2.

I believe the answer is transmission electron microscopes.

(Edited) It is Scanning Electron Microscope because it scan the surface of the substance and shows a 2 dimensional image

Answer:

Its B. the next one is structures of cell membranes. The one after this one is chemical message. The one after that one is insulation.  mark brainlest plz and yall welcome!!!

Explanation:

Fat around organs is also known as visceral fat or intra-abdominal fat. It serves a protective role in the body. Therefore, option B is correct.

It acts as a cushioning layer and provides insulation to protect the organs from mechanical shocks and impacts. This layer of fat helps safeguard vital organs like the liver, kidneys, and intestines from potential injuries.

While fat is present in various tissues and has numerous roles in the body, including hormone regulation and thermal insulation, the specific function of fat around organs is primarily related to protection.

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Answer

D..The enzyme changes shape and can no longer speed up the reaction.

Explanation:

We are a graph which shows the activity of an enzyme changes at different temperatures.

We have to find that which statement describe what happens to the reaction increases to 63 degrees.

We know that enzymes are biological catalyst and made from  proteins .

It does not change in the reaction.

Catalyst increase the rate of reaction but do not  any change in  the reaction.

Therefore , when temperature increase then rate of reaction increases upto optimized level and then decreases when temperature increases.

Hence,option D is true.

Why does darkness affect the light-independent reactions of photosynthesis?

Why does darkness affect the light-independent reactions of photosynthesis? Plants stop their daytime activities and rest during the night much like animals do. ... Mitochondria produce sugars more effectively in the darkness than chloroplasts do. Light independent reactions require the energy gathered in the

Darkness affects the light-independent reactions or Calvin cycle in photosynthesis indirectly by halting the production of ATP and NADPH from the light-dependent reactions, which are necessary for the Calvin cycle to synthesize carbohydrates.

Light-independent reactions, also known as the Calvin cycle, in photosynthesis, don't necessarily occur in darkness but are called 'light-independent' because they do not require light to proceed. They use the ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into carbohydrates. However, the Calvin cycle can be indirectly affected by darkness because the light-dependent reactions, which produce the ATP and NADPH needed for the Calvin cycle, cease without light. Without these products, the Calvin cycle cannot proceed efficiently. Additionally, enzymes like rubisco in the Calvin cycle are also sensitive to light and may be less active in the dark, further reducing the Calvin cycle's effectiveness at night.

Although fictional, a martian, in this sense, would be considered living. While a car would be considered non living.

Hope this helps :)

Mars is a planet that has the potential for life, but so far, there is no direct evidence of living organisms on its surface. Scientists are interested in searching for fossil life on Mars and are planning future missions to study Martian samples.

Mars is a planet that has the potential for life, but so far, there is no direct evidence of living organisms on its surface. The conditions on Mars, such as the lack of organic material and the sterilizing effect of ultraviolet light, make it unlikely for organisms to survive. However, scientists are still interested in searching for fossil life on Mars and are planning future missions to study Martian samples in laboratories on Earth.

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Salad dressing is an example of a heterogeneous mixture. The reason it is heterogeneous is because not everything is perfectly mixed in together. In most salad dressings, there are chunks or particles that you can visibly see and separate. For the mixture to be considered homogeneous, everything would have to be combined smoothly, you wouldn't be able to see any chunks, and nothing would have been able to be separated, at least by physical means.

A mixture is a solution or a suspension that is made up of two or more components. Mixtures can be classified as:

This heterogeneous mixture is a suspension of oil and vinegar.

An Italian salad dressing is a mixture that is made up of components such as oil, vinegar, spices e.t.c

When oil mixes with vinegar the solution formed is called an immiscible solution. This is because oil mixing with vinegar does not form a uniform solution.

Hence, a mixture of oil and vinegar is a heterogeneous mixture.

Therefore, the correct option is Option A.

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Answer:

Protein activity rises as temperature  rises, and in turn, improves the rate of the reaction.

Explanation:

Warmth plays a vital role in biology as a way to control reactions. Protein activity rises as temperature  rises, and in turn, improves the rate of the reaction. This also means activity lowers at colder  temperatures. All proteins have a variety of temperatures when they are working, but there are some  temperatures where they work optimally. Using the latest Celsius mode of temperature measurement, we  can quickly discover how warm or cool it is. It was also known as Centigrade. This is because it is based  on the freezing and boiling points of water with 100 degrees within those temperatures. The main SI unit  of temperature is the Kelvin, which measures certain temperatures. However, for our everyday practice,  we use Celsius which is directly associated to kelvins. This is placed so that pure liquid freezes at zero  degrees Celsius and boils at one hundred degrees Celsius.

30 total number of oak trees in the given population are suffering from oak wilt disease.

The Population may be defined as the total number of individuals of the same species living in a particular area at a given time.

According to the questions, out of 120 oak trees, 25% of them have oak wilt disease.

∴ 120/100 × 25 = 1.2 × 25 = 30.

Therefore, 30 total number of oak trees in the given population are suffering from oak wilt disease.

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An amoeba feeds through a process called endocytosis, specifically phagocytosis. This involves engulfing food particles with its plasma membrane which forms a vesicle. The food is then broken down and absorbed, and waste is expelled through exocytosis.

The process through which an amoeba feeds is called endocytosis. This is a type of active transport that involves the movement of particles such as large molecules, parts of cells, and even whole cells, into a cell. The amoeba surrounds the food particle with its plasma membrane, which invaginates, forming a pocket around the food particle. This pocket then pinches off, resulting in the food particle being contained in a newly created intracellular vesicle formed from the plasma membrane. This is sometimes referred to as phagocytosis, a type of endocytosis. Once the food particle is fully enclosed in the vesicle, it is broken down and absorbed by the amoeba. Any waste that remains is then expelled from the amoeba through a process known as exocytosis.

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lysosome- hulk SMASH.

nucleus- with great power comes great responsibility.

cell wall - I can protect all the day.

mitochondria-

I am the powerhouse of the cell.

chromosomes- it's not who I am underneath but what I do that defines me.

you'll like it I guess

thanks! ;) :D

Here are a few superhero slogans for some cell organelles: 'Blueprints of the cell, unlocking our potential!' for Chromosomes, 'Taking the bad, giving the good!' for Lysosome, and 'Controlling the cell for a powerful future!' for Nucleus.

Here are a few superhero slogans for some cell organelles:

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The composition of the hair shaft onto which shampoos and conditioners are applied are; keratin, water, lipids, minerals, and pigments (melanin).

The hair shaft is a part of the hair that is situated above the skin. The hair shaft is mostly composed of keratin with water, lipids, minerals and pigments (melanin). The hair shaft contains three layers which are; the cuticle (the thin outer part of the hair shaft), the cortex (the middle part of the hair shaft which is responsible for the texture, strength, and colour of the hair), and the medulla (the deepest part of the hair shaft). The cuticle is the first layer of the hair shaft to be damaged when hair is not treated properly through the use of insufficient  shampoo, conditioner, or brushing.

The answer is A: Infiltration.

A: infiltration because the rainwater is seeping into the ground.

Where's the evolution?

The physics of light affects not just how blue water looks to us, but how the animals living in the world's oceans, lakes, and rivers are able to find food and each other — and this, in turn, can impact their evolution. Natural selection favors traits that perform well in local environmental conditions. Many fish species, for example, have evolved vision that is specifically tuned to see well in the sort of light available where they live. But even beyond simple adaptation, the physics of light can lead to speciation. In fact, biologists recently demonstrated that the light penetrating to different depths of Africa's Lake Victoria seems to have played a role in promoting a massive evolutionary radiation. More than 500 species of often brightly colored cichlid fish have evolved there in just a few hundred thousand years!

Final answer:

Natural selection in the cichlid species of Lake Victoria occurred through rapid adaptive radiation, with species diversifying into various niches. This process led to the creation of about 500 different cichlid species, emphasizing the role of natural selection in biodiversity.

Explanation:

Natural selection in the cichlid fish species of Lake Victoria occurred via adaptive radiation, which is a rapid branching through speciation of a phylogenetic tree into many closely related species. This diversification allowed the cichlids to fill different niches and habitats, resulting in hundreds of species with specialized feeding strategies such as eating plankton, scraping algae, eating insect larvae, and eating the eggs of other cichlid species. The cichlids' remarkable diversity, which included about 500 species, showcases the power of natural selection in shaping biodiversity within a relatively short span of time, in this case, less than three million years.

Unfortunately, the introduction of the Nile perch, declining lake water quality, and increased fishing pressure contributed to the dramatic decline and extinction of many cichlid species in Lake Victoria, reducing the once vibrant biodiversity.

A. The seductive part

Final answer:

The most sensitive part of the body is the face, especially the anterior two-thirds of the tongue. This is determined through special and general sensory tests.

Explanation:

The most sensitive part of the body is the face, especially the anterior two-thirds of the tongue. These areas are responsible for taste, which is a special sense. Testing the sensitivity of general senses like touch and painful stimuli can help determine the level of sensitivity in different parts of the body.

For example, sensitive parts like the face and fingers have more representation on the brain's cortex compared to less sensitive parts like the legs or back. This means that the brain devotes more space to process sensory information from these highly sensitive areas of the body.

Chemical change: you should probably put a log burning

Homeostasis: you should draw the human body -the lungs and this as such showing if that's your level of drawing-

Stable: you should maybe draw a human being standing on one leg and completely balanced  or in control of their body

Id help you draw these things cos i guess im pretty good *looks at the screen*  but emm that's not gonna happen -_-||

Anyways Hopefully this helps ^-^

Ok. So what you want to do is -20 because it says went down 20 ft. Then -3 more. + 7. -20+-3=-23+-7=16 So you get 16. I hope that helps.

The answer is isotonic solution

compulsion is the action or state of being forced into do things

I think is b but I don’t no

b. is the answer. When the temperature rises particles move faster.

I would hope about 50% of the energy you get back from eating something