An experiment was conducted to demonstrate the passage of glucose and starch across a selectively permeable membrane that allows monomers but not polymers to diffuse through.

Glucose and starch powders were mixed in 10 ml of water and poured into a cellulose bag, which was then sealed at both ends and placed in a beaker of water. After 30 minutes, the presence of glucose in the beaker was recorded with a testing paper, which turns green if glucose is present. The presence of starch was recorded by adding a few drops of iodine, which causes the solution to turn violet if starch is present.

A beaker filled with 100 milliliters of distilled water. A bag filled with 10 milliliters of water and a solution of 2 percent glucose and 2 percent starch is placed in the beaker of water.

Which statement best describes the expected result?

A) The testing paper will turn green and the solution will turn violet.
B) The testing paper will turn green and the solution will not turn violet.
C) The testing paper will not turn green and the solution will turn violet.
D) The testing paper will not turn green and the solution will not turn violet.

Answer:

me

Explanation:

from me, ihave money

Answer:

from their mouths

Explanation:

:)

The sub-disciplines of science being referred to in the different situations respectively are:

1. Ecology

2. Biochemistry

3. Osteology

4. Evolution

5. Cell biology

The sub-disciplines of science are otherwise known as branches of science. They refer to specific areas of science instead of the general knowledge that science entails.

The various sub-disciplines of science include:

Considering all these definitions, one can conclude that the various sub-disciplines being referred to in the illustration are:

1. Ecology

2. Biochemistry

3. Osteology

4. Evolution

5. Cell biology

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Answer:

Soap or alcohol affects the hydrogen bonds between water molecules by making the bond weaker.

Soap or alcohol affects the hydrogen bonds between different water molecules due to their hydrophobic nature. They lower the hydrogen bonding between water by pushing their atoms up.

Soap is a component of fatty acid and glycerine. They are hydrophobic, which means they fear water. They are used to washing clothes and bodies. Furthermore, they mix with the oil of the body.

Soap is a surfactant, or a substance that lessens a liquid's surface tension. For instance, soap reduces water's surface tension by weakening the hydrogen bonds that give water its unique properties.

Thus, because they are hydrophobic, soap and alcohol influence the hydrogen bonds that connect various water molecules. By raising their atoms, they reduce the hydrogen bonding between the water molecules.

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Where is the statement

Answer:

aging

Explanation:

infancy last only around 12 months.

puberty last only around 4-6 years.

reproduction takes around 9 months.

aging however is something we do from birth to death.

The long, bushy tail of the raccoon may be a selective advantage for this species because the bushy tail helps keep the face warm during a snowstorm (Option d). In addition, it may serve as camouflage and also may act to communicate with other members of the population.

An evolutionary selective advantage is a feature in a species that confer an advantage to survive and reproduce in a particular environmental condition, which may be associated such as in this case to the tail in raccoons.

Therefore, with this data, we can see that an evolutionary selective advantage is any phenotypic feature that enhances the survival and or reproductive rate of individuals in a population or species.

Complete question:

The opossum is a new arrival in southern Ontario. Its niche is similar to that of the raccoon. An opossum has a long, bare, rat-like tail. A raccoon has a long, bushy tail. How is this a selective advantage for the raccoon?

selective advantage only applies to populations

the opossum  tail can grab onto a tree for balance

tail fur does not have an impact on survival

the bushy tail helps keep the face warm during a snowstorm

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The middle cochlear chamber that contains the organ of Corti is called the "scala media" or "cochlear duct".

It is one of the three fluid-filled chambers of the cochlea, the spiral-shaped part of the inner ear responsible for converting sound waves into neural signals that can be interpreted by the brain. The scala media is located between the scala vestibuli and the scala tympani, which are the other two fluid-filled chambers of the cochlea.

The organ of Corti is located in the cochlea, which is a spiral-shaped structure in the inner ear. The cochlea is filled with fluid and lined with thousands of hair cells, which are specialized cells that are responsible for converting sound waves into electrical signals. The organ of Corti is located on the basilar membrane, which is a thin sheet of tissue that separates the fluid in the cochlea from the inner ear's fluid-filled vestibule.

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The question is incomplete. Here is the complete question.

You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat and the rest have a dark coat. You know that light coat color is recessive in ground squirrels. What is the allele frequency for the light coat allele  and the dark coat allele? How many of the dark coated individuals do you expect to be heterozygotes at the coat color gene? Assume the population is at H-W equilibrium.

Answer: Allele frequency for light coat: q = 0.3;

              Allele frequency for dark coat: p = 0.7;

             There will be 42 heterozygote;

Explanation: A population in H-W equilibrium is a population which doesn't change from one generation to the next if there are no disturbing factors, as migration or mutation.

It follows the equation: \(p^{2}+2pq+q^{2}=1\).

p represents the frequency of the dominant allele;

q represents the frequency of the recessive allele;

2pq represents heterozygote individuals;

The sum of frequencies of both alleles must be 1, i.e.: \(p+q=1\)

For the population of squirrels:

\(q^{2} = \frac{9}{100}\)

\(q = \sqrt{\frac{9}{100}}\)

q = 0.3

\(p+q=1\)

\(p=1-q\)

\(p=1-0.3\)

p = 0.7

2pq = 2*0.7*0.3 = 0.42

In a population of 100 individuals: 0.42*100 = 42

The allele frequency for the light coat is 0.3; for the dark coat is 0.7.

It is expected to have 42 heterozygote individuals in this population.

Photosynthesis occurs in two stages, light-dependent and light-independent reactions. This last one is the Calvin cycle, and its main function is to produce sugars. D. to produce glucose.

Photosynthesis involves two stages: light-dependent and light-independent reactions.

Light-independent reaction is known as the Calvin cycle, and it takes place in the stroma.

During the Calvin cycle, sugars or carbohydrates are synthesized.

When carbón dioxide, CO₂, enters the leaves through stomas, it diffuses to the chloroplast stroma. Carbon atoms fixate, meaning that they incorporate into organic molecules. These molecules are used to produce 3-C sugars.

The whole process is impulsed by ATP and NADPH coming from light-dependent reactions.

The alternation of the processes of light-dependent and light-independent reactions help the cell conserve energy and matter.

Plants takes solar energy and produce ATP and NADPH. When there is no available solar energy, the plant uses these molecules to produce carbohydrates.

The correct option is D. to produce glucose

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Answer:

The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the cell theory.

hope this helps :)

Thus, although it is evolving by all the other forces, the evolution of human hair color is not being driven by the process of natural selection.

Natural selection is the method by which a species adapts to its surroundings. Natural selection causes evolution when individuals with particular traits have a better chance of surviving than those who are not able to adjust to the changes, and these traits are handed on to succeeding generations.

Better-adapted organisms will live and procreate through a process called natural selection. This indicates that this mutant organism's favorable alleles are handed on to progeny. Natural selection over many generations causes evolution to take place.

Thus, despite being influenced by all other variables, natural selection is not the primary cause behind the development of human hair color.

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Answer:

H₂ + Cl₂ ---> 2 HCl

Explanation:

It looks like the reactants are not allowed to have coefficients (not enough boxes), so you need to pick reactants and products that satisfy this condition. The only ones that appear to fit are:

H₂ + Cl₂ ---> 2 HCl

Answer:

Need more info please and thank you

Explanation:

I can help you but please give ne more info

Answer:

ATP is the form of energy that your cells require to perform their functions. This form of energy is made in the mitochondria in a process known as cellular respiration.

Explanation:

***I'm assuming that this question relates to respiration as it has to do with energy. ATP energy are products of cellular respiration. Along with ATP energy, we also have 2 more products, which is H2O and CO2.

We breathe out carbon dioxide since we don't need CO2 in our bodies and we sweat water by the amount of heat + energy you are using up.

***We need to undergo cellular respiration to obtain energy. To obtain this energy, you need the mitochondria as it is the powerhouse of the cell. The mitochondria creates that energy you need as a living organism.

Answer:

1. Isotope

Explanation:

Isotope is the atom of the same element whichhave same proton and electron but they have different mass number

An investigation is an example of research.

Research is the process of gathering and analyzing information in order to answer a question or solve a problem. Investigations are a type of research that is typically conducted to gather evidence about a crime or other incident. Investigators may gather evidence through interviews, document reviews, and physical examinations. They may also use scientific techniques, such as DNA testing or fingerprint analysis.

The goal of an investigation is to gather enough evidence to determine what happened and who is responsible. This information can then be used to bring charges against the perpetrator or to take other necessary steps.

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Answer:

The importance of fossils to the rock record is that fossils provide evidence that organisms from the past are not the same as those found today, and demonstrate a progression of evolution

Explanation:

Answer:

frequency of allele “A” is .39

frequency of allele “a” is .77

Explanation:

hardy weinberg equation

p^2 + 2pq + q^2 = 1 or (A+a)^2

p^2 =  (AA)

2pq =  (Aa)

q^2 = (aa)

AA -> 15/100 = .15

Aa -> 25/100 = .25

aa -> 60/100 = .60

if p^2 = AA = .15 then A = √.15 = 0.38729833462 = .39

if q^2 = aa = .60 then a = √.60 = 0.77459666924 = .77

wikipedia quoraAnkitGauba

Anaerobic respiration is the term for the breakdown of glucose when there is no oxygen present. When energy from glucose is released, a chemical activity known as respiration takes place in living cells.

In the absence of oxygen, glucose is partially converted to pyruvate. Anaerobic respiration is the name given to this process. Glucose is partially converted into water and carbon dioxide in the absence of oxygen. If all oxygen is removed, fermentation takes place. In anaerobic respiration, bacteria and yeast break down glucose (food) into alcohol and carbon dioxide while lacking oxygen to release energy.

So, we can say that the process of breaking down glucose when there is no oxygen present is known as anaerobic respiration. Living cells engage in a chemical process known as respiration when glucose is converted to energy.

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Answer:

Carboxyl group and Amino Group

Explanation:

Hope this helps.

Answer:

Explanation:

When a meal containing fried fish and toast bread is consumed, it goes through a series of processes in the digestive system of a human. Here's a general description of how the components are processed:

1. Mouth: The process of digestion begins in the mouth. Chewing breaks down the toast bread and fish into smaller pieces, while saliva mixes with the food to start the breakdown of carbohydrates.

2. Esophagus: The chewed food, now called a bolus, is swallowed and travels down the esophagus through peristaltic contractions. The esophagus carries the food to the stomach.

3. Stomach: The stomach is responsible for further mechanical and chemical digestion. It mixes the food with stomach acid and digestive enzymes to break down proteins. The fried fish is broken down into smaller pieces through mechanical churning.

4. Small Intestine: The partially digested food leaves the stomach and enters the small intestine. Here, bile from the liver and enzymes from the pancreas break down fats, while other enzymes continue the breakdown of proteins and carbohydrates. Nutrient absorption occurs through the walls of the small intestine and is facilitated by small finger-like projections called villi.

5. Large Intestine: Any remaining undigested food, as well as water and electrolytes, pass into the large intestine. The large intestine absorbs water and electrolytes while forming waste material known as feces.

6. Rectum and Anus: The feces are stored in the rectum until elimination through the anus occurs during a bowel movement.

Throughout this process, various digestive enzymes and gastric juices are secreted at different stages to facilitate the breakdown and absorption of nutrients. The fried fish and toast bread are broken down into smaller molecules, such as proteins, carbohydrates, and fats, which are then absorbed into the bloodstream to provide energy and nourishment for the body.

A. The thylakoid membrane plays a critical role in the conversion of light energy to chemical bond energy in ATP through the process of photosynthesis.

Within the thylakoid membrane, there are pigments called chlorophyll that are responsible for absorbing light energy. When light energy is absorbed by chlorophyll molecules, it excites the electrons, initiating a series of electron transport reactions.

The thylakoid membrane is crucial for this process because it provides the structural framework and houses the components necessary for electron transport and ATP synthesis.

It contains protein complexes such as photosystem I and photosystem II, cytochromes, and ATP synthase, which are involved in the sequential flow of electrons and the production of ATP.

B. If a chemical compound targets and alters the lipid components of the thylakoid membranes, resulting in reduced integrity and increased membrane leakage, it would likely have significant negative effects on plants. Here's how it can impact plants:

Disruption of photosynthetic electron transport: The altered lipid components could impair the arrangement and stability of the protein complexes involved in electron transport, such as photosystem I and photosystem II.

This disruption could hinder the flow of electrons and reduce the efficiency of photosynthesis, leading to a decreased production of ATP and NADPH.

Decreased energy production: With compromised thylakoid membrane integrity and increased leakage, the proton gradient required for ATP synthesis would be disrupted.

This would lead to a decrease in ATP production, which is essential for various energy-requiring processes in plants, including growth, metabolism, and cellular activities.

Thus, a chemical compound that targets and chemically alters the lipid components of the thylakoid membranes, causing reduced integrity and increased membrane leakage, would negatively impact plants by disrupting photosynthetic electron transport, reducing energy production, impairing chloroplast function, and hindering plant growth and development.

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(I would appreciate a Brainliest rating if this helped you)

Answer:

Describe Isotonic fluids:

♦ Isotonic fluids are solutions that have the same concentration of solutes as the body's fluids, specifically the blood plasma. This means that when isotonic fluids are administered into the body, they do not cause any change in the osmotic pressure across cell membranes and do not cause any net movement of water into or out of the cells.

Examples:

♦ Some examples of isotonic fluids include normal saline (0.9% NaCl), lactated Ringer's solution, and 5% dextrose in water (D5W).

Indications:

♦ Isotonic fluids are commonly used in medical settings to maintain or replenish fluid and electrolyte balance in patients. Indications for the use of isotonic fluids include dehydration, hypovolemia (low blood volume), electrolyte imbalances, and shock. They are also used during surgeries and blood transfusions to replace lost fluids.

Contraindications:

♦ There are certain situations where isotonic fluids should be avoided or used with caution. Contraindications for the use of isotonic fluids include congestive heart failure, pulmonary edema, and renal failure, as they may exacerbate these conditions. Additionally, isotonic fluids may not be appropriate for patients who require fluid restriction, such as those with certain kidney or liver conditions.

The two sentences that describe what scientists have discovered about red algae and sponges are:

B. Biomarker evidence of sponges has been found in rocks that date back to the great oxidation event, while evidence of red algae appeared long after the event.

D. The earliest fossil evidence of multicellular life is of red algae, while the earliest fossils of sponges, also multicellular, appeared much later.

Scientists have discovered biomarker evidence of sponges in rocks that date back to the great oxidation event, while the earliest fossil evidence of multicellular life is red algae.

Hence options B and D are correct.

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Resource economics is a discipline that examines how societies employ their limited resources. The primary purpose of resource economics is to analyze how resources are developed, utilized, and depleted over time.

In general, the study is concerned with the optimal use of resources in a way that maintains or increases the well-being of people over time.The following statement best explains the importance of resource economics: It examines the cost and profits of resource use. According to resource economics, the optimal use of resources is obtained when the cost of producing and distributing goods is at the lowest possible level, while still guaranteeing that the goods and services are of high quality.

In order to achieve this, resource economics analyses the cost and benefits of resource use, and offers insight into how society can make the most efficient use of its limited resources. Therefore, this statement is the most appropriate, since it clarifies that resource economics is concerned with analyzing the cost and profits of resource use, which is necessary for any community to use its resources in a way that is both sustainable and profitable. Resource economics examines how resources are utilized and depleted over time, with the aim of maintaining or increasing the well-being of people over time.

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The scientific method is a systematic approach used by scientists to investigate and understand the natural world these steps are iterative, meaning that scientists often repeat the process, refining their hypotheses and experiments to gain a deeper understanding of the phenomenon under investigation.

It involves a series of steps that help ensure objectivity, reproducibility, and reliability in scientific research.

The main steps of the scientific method are as follows:

Observation: The first step involves making careful observations of a phenomenon or a problem in the natural world.

Scientists use their senses or instruments to gather data and identify patterns or interesting phenomena.

Question: Based on the observations, scientists formulate a research question that addresses the underlying cause or mechanism of the observed phenomenon.

The question should be specific and testable to guide the subsequent steps.

Hypothesis: In this step, scientists propose a possible explanation or solution to the research question.

The hypothesis is a tentative statement that can be tested through further experimentation or observation.

It should be based on existing knowledge and provide a clear prediction.

Experimentation: Scientists design and conduct experiments to test the hypothesis.

They manipulate variables, control conditions, and collect data to analyze and draw conclusions.

The experiment should be carefully planned, with appropriate controls and statistical methods to ensure accurate and reliable results.

Analysis: After collecting the data, scientists analyze the results using statistical methods or other analytical techniques.

They examine the data to determine if it supports or refutes the hypothesis.

This step involves organizing and interpreting the data to draw meaningful conclusions.

Conclusion: Based on the analysis, scientists draw conclusions about the hypothesis.

If the data supports the hypothesis, it may be accepted as a plausible explanation.

If the data does not support the hypothesis, scientists may revise the hypothesis or propose alternative explanations.

Through this iterative process, scientific knowledge advances and contributes to our understanding of the natural world.

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Answer:

D.

Explanation: