Answers
Answer:okay so I did it it was very fun so here are my results EXPERIMENTAL DATA Before After 24 hours
Color of Starch solution It was a whitish color. Dark, purple, black color. inside bag!Color of Iodine solution A golden color. A transparent creme inside beaker color. Color of starch solution White White inside bag! Color of H20 in beaker TransparentExplanation: Conclusion
The conclusion to this test is that the plastic bag is permeable to iodine. The result
of this experiment clearly answers the "Problem" as stated above. This is~ by
the fact that the starch solution (dependent variable) in the baggie turned purple,
indicating the presence of iodine (independent variable) in the mixture. The starch
solution is the dependent variable because its color is affected by the iodine
solution. M.y hypothesis was that the iodine will get into the bag of starch because
the baggie is permeable to iodine. If the iodine solution penetrates the bag, it will
turn the starch solution inside the baggie, purple. The control data chart above
shows that if the starch had not been immersed in the iodine solution, but rather a
water solution, it would have remained the same color, white. Obviously, in order
for the iodine to enter the starch solution, the baggie must be permeable to the
iodine. The baggie represents a cell membrane. This lab is meant to demonstrate
whether or not a cell membrane is permeable to substances. Cell membranes of
living organisms may be permeable to some substances, but not permeable to other
substances. In this experiment,'1..charted that the iodine solution in the beaker did
not turn purple. This means that the starch solution did not penetrate the baggie
and therefore did not mix with the iodine outside the baggie. Because of this data, it
is clear that the plastic baggie is not permeable to starch, but is permeable to iodine.
In a cell membrane, this is called selective permeability. In other words, the iodine
can go through the baggie, but the starch cannot. The purpose of this experiment is
to show that a cell membrane is a type of barrier, and is permeable to some
substances, but may not be permeable to all substances. Therefore, a cell membrane
is selectively permeable.
Related Questions
Does a frog eat a chameleon ?
Answers
Answer:
Frog cannot eat a chameleon, due to it's tongue size and body structure, on the other hand chameleon can eat frog due to its coiled tongue, it can eat small sized frogs.
An energy-rich organic compound needed by organisms is:
(1) water
(2) oxygen
(3) salt
(4) glucose
Answers
Four children pull on the same stuffed toy at the same
time, yet there is no net force on the toy. How is this
possible?
Answers
Answer:
The forces the children are exerting on the object balanced one another.
Explanation:
Equal forces acting on an object in opposite directions.
Hope this helps!
Answer:
Sample Response: Forces are either positive or negative vectors, depending on the direction in which the force is acting. The net force is the sum of all of the forces acting on an object. If the children pull on the toy with the same force in opposite directions, the forces will be perfectly balanced and cancel out, leaving a net force of zero.
Explanation: :)
Which field is not a branch of biology?
Answers
Answer:
Computer science ig
Explanation:
Good Luck!
Individuals tend to make decisions with the elimination-by-aspects strategy as choices become more simple. Please select the best answer from the choices provided OT o F
Answers
Answer:
false
Explanation:
hope this helps :)
It is false that individuals tend to make decisions with the elimination-by-aspects strategy as choices become more simple.
What is decision making?The process of making choices by identifying a decision, gathering information, and evaluating alternative resolutions is known as decision making.
By organizing relevant information and defining alternatives, a step-by-step decision-making process can help you make more deliberate, thoughtful decisions.
The significance of decision making is found in how it assists you in choosing between various options.
Before making a decision, it is necessary to collect all available information and weigh its pros and cons. It is critical to concentrate on steps that can assist in making sound decisions.
The ability to choose between two or more alternatives in order to achieve the best result in the shortest amount of time.
Thus, the given statement is false.
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True or false: Large molecules called monomers are made of smaller subunits called polymers. A True B False
Answers
Reason: Because monomers are long chains of reapeating subuints in Polymers
The statement, large molecules called monomers are made of smaller sub-units called polymers is false.
Polymers are macromolecules formed by agglomeration of small molecules called monomers. Monomers are very small molecules which can join together to form long chains.
The subunits of polymers are monomers. Hence, the statement, large molecules called monomers are made of smaller sub-units called polymers is false.
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I put Biology but it is actually Astronomy.
Drag each tile to the correct box. Not all tiles will be used.
The presence of liquid water on Earth is an important factor in moderating the planet’s temperature. Place the tiles in the correct order to explain how water regulates the planet’s temperature.
1. Heat released by water prevents Earth from freezing at night.
2. Daytime temperature remain moderate.
3. Water absorbs solar radiation during the day.
4. Water absorbs heat from the land during the day.
5. At night, water releases heat.
What is the correct order?
**please help me im stuck thx**
Answers
Answer:
It goes in order like this:
1. Water absorbs solar radiation during the day.
2. Daytime temperatures remain moderate.
3. At night, water releases heat.
4. Heat released by water prevents Earth from freezing at night.
I hope this helps! :)
The correct order to explain how water regulates the planet’s temperature is as follows:
Water absorbs solar radiation during the day.Daytime temperatures remain moderate.At night, water releases heat.The Heat released by water prevents Earth from freezing at night.What is Solar radiation?Solar radiation may be defined as a type of electromagnetic radiation which is constantly emitted from the sun. Such type of radiation can be captured and transformed into useful forms of energy, such as heat and electricity through the utilization a variety of technologies.
The process of regulating the temperature initiates with the absorption of solar radiation during the daytime, due to this, the temperature of the daytime remains moderate.
This absorbed radiation at night time liberates heat. This liberated heat at night prevents the water to freeze for this specific duration.
Therefore, the correct order to explain how water regulates the planet’s temperature is briefly mentioned above.
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A plant is moved from direct sunlight and placed into complete darkness.
Which structure in the plant's cells would be most affected by this change
Answers
Does a toucan eat a frog ?
Answers
Answer:
Explanation
toucans take delight in eating the eggs of smaller birds, small juicy insects, tree frogs and reptiles including lizards and snakes.
how many kinds of dna is in a nucleotide molecule?
Answers
Answer:
four
Explanation:
Answer:
Because there are four naturally occurring nitrogenous bases, there are four different types of DNA nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C)
you go out to dinner with your best friend. during dinner you consume the following meal: spinach green with sunflower seeds, a Dr. Pepper and a piece of unbuttered french bread. identify the biological molecules that would likely be present and what would they be processed into after
Answers
Answer:
The biology Molecules that will.be present in what she consumed are Carbohydrates from unbuttered bread, vitamins green spinach, Fat and oil or lipids from sunflower seeds, proteins...
The Carbohydrates is processed into glucose, proteins is processed into amino acids, lipids is processed into fatty acids and glycerol.
Explanation:
From the food consumed, The biology Molecules that will.be present in what she consumed are Carbohydrates from unbuttered bread, green spinach contains vitamins like vitamin K, vitamin A, vitamin C, vitamin B12 , minerals like magnesium, iron, Fat and oil or lipids from sunflower seeds, proteins...
The Carbohydrates is processed into glucose after enzymes like salivary amylase acts on it from the chewing and in the stomach which produces glucose which makes it easily absorbable , proteins is processed into amino acids by the activity of hydrochloric acids and protease that processed it into amino acids, lipids is processed into fatty acids and glycerol by the activities of the enzymes lipase.
The minerals and vitamins present are in a way they can be absorbed.
The molecules that will be present in the foods shown above would be sugar, carbohydrates, lipids, fiber, vitamins, calcium, phosphorus, potassium, proteins, and magnesium.
We can arrive at this answer because:
French bread will supply the body with carbohydrates. These carbohydrates will be turned into sugars, mainly glucose.The proteins present in spinach will be transformed into amino acids that will be used in the production of other proteins.The lipids present in sunflower seeds will be transformed into fatty acids, glycerol, and fat.The calcium present in spinach will be absorbed by the bones.Vitamins, phosphorus, and potassium will be broken down and dissolved in the bloodstream.Fiber will be metabolized by the intestine.Based on this, we can say that proper nutrition is important because it promotes essential molecules for the functioning of the body.
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EXPLAIN Make a claim about the affect urbanization has on
biodiversity. Does urbanization always decrease biodiversity? Use
evidence to support your claim and explain your reasoning. Address
the following questions in your answers
• What are the main factors that lead to biodiversity loss in urban
areas?
• How is the size of a habitat related to its biodiversity and its stability?
• Can an ecosystem in an urban area ever return to its previous state?
Answers
Answer:
Urbanization decreases biodiversity. Land development reduces the size of habitats and affects the availability of resources. Larger habitats have a greater potential for biodiversity. If some of the natural habitat is retained, the impact of urbanization may not be as destructive. Assuming human development and its resulting pollution aren’t too extensive, an abandoned urban area could return to its previous ecosystem.
Explanation:
It is found that urbanization affects the biodiversity and the relationship between them is not linear as with the increase in urbanization the area of forest keeps on decreasing which reduces the natural habitat of many species and lead to their extinction.
What affects biodiversity?
Biodiversity of an area is the total number of living organisms (species) living in a particular area. Most of the biodiversity are found in the forests as these are the natural habitats of many animal species.
The ecological studies conducted on the urbanization and biodiversity have found that the urbanization generally shows a negative impact on the biodiversity levels of an area. The relationship between biodiversity and urbanization is not always a linear relation. As the area of urban citied increases, the area of forest decreases which lead to extinction of many important species.
The forests are the natural habitat of animals, as the natural habitat decreases the biodiversity of an area also decreases which affects the stability of the forest.
An ecosystem in an urban area can be returned to a biodiversity-rich area by introducing species and making the habitat more favorable for them.
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Can you find the atomic number of an element on the periodic table?
Answers
Answer:
yes!
Explanation:
hi, the atomic number of an element is usually right above the element symbol on the periodic table, and represents the amount of protons in the atom.
Which molecules would REQUIRE a channel or transport protein to cross the cell membrane?
A) CO2
B)H2O
C)k+
D)O2
Answers
Explanation:
Small non-charged molecules like CO2, H2O, O2 can pass through the membrane freely.
But others such as K+ require specific potassium bumps throughout the membrane. Which acts to transport Na+ and K+ cross the membrane.
Both photosynthesis and cellular respiration are part of the carbon cycle. Which statement best compares these two processes? Both release carbon dioxide as waste. Both provide organisms with usable energy. Both add bacteria to the soil. Both require fixation in order to convert molecules.
Answers
Answer:
Both provide organisms with usable energy.
Explanation:
Both photosynthesis and cellular respiration, a component of the carbon cycle provides an organism with usable energy.
Photosynthesis is the process whereby green plants manufacture their food using carbon dioxide and water using sunlight to produce energy rich glucose and oxygen gas as a by-product.
During cellular respiration is an oxygen driven aerobic process in which organisms breaks down glucose to produce energy rich ATP.
Both processes furnishes an organism with energy in the end. Although, photosynthesis is an energy building process, cellular respiration breaks down materials to liberate energy. This energy is used by both plants and animals for their living activities.Therefore, photosynthesis and cellular respiration provides an organism with usable energy.
Answer:
The answer is B
Explanation:
if coral reef continue to die off how do you think that would affect specialist species such as butterfly fish overtime?
Answers
Answer:
If coral reefs continue to die off, I think it would have a huge impact on specialist species such as the Butterfly Fish overtime. If there are less reefs for fish to call home, that leaves less hiding places from predators, less food for such creatures, and higher risk of extinction.
water freely enters and leaves cells through channels by membrane proteins by
Answers
Answer:
Your answer is Osmosis
Either by protein channels or by sliding through the lipid tails of the membrane itself, water may also travel easily through the cell membrane of all cells.
What can help a scientist identify any object in a group of objects? O the object's size the object's colors O the object's characteristics O the object's shape Mark this and return Save and Exit Next Subinit
Answers
Answer:
c
Explanation:
took the test
Answer:
C(the object's characteristics)
Explanation:
-The analysis of data gathered during a particular experiment is necessary in
order to
*
Answers
Answer:
arrive at a conclusion
Explanation:
The analysis of data gathered during a particular experiment is necessary in order to arrive at a conclusion that will address the aim of the experiment.
Without data analysis, valid conclusions about the experiment cannot be made and what the experimenter would have is just raw data that cannot say or answer anything about the experiment.
The data collected from experiments can be analyzed in two ways:
Descriptive data analysis Inferential data analysisIn descriptive data analysis, the collected data is summarized, arranged, or described in such a way that a pattern can be seen at a glance. It includes tables, charts, histograms, etc.
In inferential data analysis, the collected data is treated in such a way that an inference can be arrived at based on the study. This includes testing for a significant difference between means, testing for the goodness of fits, correlations, etc.
How many different types of substrates can enzymes react with?
Answers
Answer:
In some reactions, a single-reactant substrate is broken down into multiple products. In others, two substrates may come together to create one larger molecule
Explanation:
There may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products. In others, two substrates may come together to create one larger molecule.
Viruses are the smallest living organisms. True or false
Answers
Answer:
I believe it's true.
Answer:
true
Explanation:
viruses are an living organism and appear to be the smallest living organisms compared to any other organisms .
the tallest mountain of earth are in mountain range, which is made by two continental plates converging
Answers
Answer: The Himalayas
Explanation: The Himalayas are the world's tallest mountains. They are forming as two continents collide. The Appalachian Mountains are the remnants of a larger mountain range.
Which piece of evidence suggests that Africa and South America formed Gondwanaland 200 million years ago? coal fields a shared ocean folded mountains land formations created by glaciers
Answers
Answer:
C, Folded Mountains
Explanation:
your welcome
Answer:
folded mountains
Explanation:
Wind, humidity, and rocks are all ____________________in a terrestrial ecosystem.
Answers
Answer:
Abiotic factors
Explanation:
wrinkled seeds show up in the F2 Generacion even though they were not present in the F1 generations
Answers
Answer:
It could have been the recessive gene showing up in F2.
Explanation:
Suggest an experiment that could be used to determine the function of the proteins in the
plasma membrane.
HELP ASAP PLEASE!! WILL MARK BRAINLIST TO WHO FIRST ANSWERS
Answers
proteins in the plasma membranes help aid in the formation of several thihngs like muscles, hair, and amino acids which is made from transcriiption of the RNA from the DNA
Large complicated molecules crucial for cell construction and function are known as proteins. They are made up of various amino acids connected by the peptide bonds.
They are an important element of the cell layer as they carry nutrients across the membrane.To find the function of membrane proteins tests like fluorescence recovery following photobleaching can be used to determine the mobility of the proteins.Another method of nitrocellulose blots treatment by glutaraldehyde can be employed.To learn more about plasma membrane proteins follow the link:
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Which system of units is used by only a small number of countries in the
world, including the U.S.?
Answers
How would you slow a herd down
Answers
If its a herd of caddle or bulls, Somone on a horse would be riding next to the herd slowing turning the herd back to where they belong
Answer:
capture the leader of the herd, or cut them off.
Explanation:
the herd will follow their leader, so if you control the leader then you control the heard; if the herd doesn't have a leader or you cannot control the leader, then cut them off by blocking their way until they are going in the direction you want them to or have stopped.
What sort of overall charge will this atom of phosphorus have?
Answers
Answer:
negative
Explanation:
Tha last shell has 5 in its valency
It needs to gain in order to reach a full outer shell
The fossils of a few organisms are shown below. The first image is a bird, the second image is a dinosaur, and the third image is an Archaeopteryx. The dinosaur fossils were obtained from the lower sedimentary layer, and Archaeopteryx was found above it. The fossils of the bird were found on the topmost layer, which suggests that they’re the_____ . This information also suggests that Archaeopteryx _______.
-21 POINTS-
Answers
Answer:
They're the Youngest. This information also suggests that Archaeopteryx was once thought to be the oldest known fossil bird.
Explanation:
Hope this helps.
Based on the principle of superposition, we can conclude that the topmost layer is the youngest. Hence, the fossil of birds is the youngest, while Archaeopteryx is younger than dinosaur fossil.
According to the principle of superposition, sedimentary deposits are layered such that, the oldest layer is at the bottom and the youngest is the topmost layer.
Hence, dinosaur fossil are the oldest, followed by Archaeopteryx, then birds.
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