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.
Given the DNA sequence: GGTACCTAAG
What would the sequence be that pairs with it?
Select one:
a. GGTACCTAAG
b. CCATGGATTC
c. GACGAATCCA
Answer:
I will say the answer is b because it ccatggattc
what explains a broken bone healing?
A protective thrombus plus callus are formed around a fracture shortly after it occurs as a result of the body's protective measures to treat the wound. On both sides of a fracture line, fresh bone cell "threads" start to form.
Why do bone cells do what they do?The cells that compose bone tissue are known as bone cells. A highly specialized tissue called bone serves three major purposes: to protect internal organs, to provide a solid framework for muscular activity, and also to store minerals like calcium and phosphorus.
Where do bone cells reside?The growing parts of bone, such as the periosteum and endosteum, include osteoblasts, the bone cells in charge of creating new bone. Osteoblasts, that don't divide, produce and secrete calcium salts and the collagen matrix.
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i need help with this please
Answer:
1st Activity = Cold Front
2nd= High Pressure with a Cold Front
Describe two ways that decomposers differ from herbivores?
Answer:
decomposers obtain food by breaking down the remains of dead organisms or other organic wastes, and herbivores are animals that eat plants.
decomposers help the soil and environment by taking away all that food or animal waste by giving back to the earth for it can make something. While herbivores are the one taking the energy from the plants that the decomposers make.
Hope this helps
Madelyn was to identify cells as plant or animal. How can she pinpoint which are plant cells?
Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall
One of the most common plants in Atlantic salt marshes is cordgrass. Periwinkle snails cling to the top of tall cordgrasses during high tide. The tall cordgrasses provide protection from the snails’ predators, such as the blue crab. While the snails do not feed directly on the cordgrass, the snails can damage the cordgrass when they graze on algae and fungi that grow on the grasses. If the snail population grows too large, it can decrease cordgrass growth.
Question
Based on the passage, which of the following describes the ecological role that cordgrass serves for the snails?
Responses
Cordgrass is a biotic factor for the snails because it is the snails’ main food source.
Answer A: Cordgrass is a biotic factor for the snails because it is the snails’ main food source.
A
Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails.
Answer B: Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails.
B
Cordgrass is an abiotic factor for the snails because it provides habitat for the snails and crabs.
Answer C: Cordgrass is an abiotic factor for the snails because it provides habitat for the snails and crabs.
C
Cordgrass is an abiotic factor for the snails because it produces algae and fungi for the snails.
Answer:
it is b cause the answr js b so coy
Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails. Hence option B is correct.
What is biotic factor?Biotic factor is defined as the live elements or factors that have an impact on an environment or other organisms residing there. A particular ecosystem is the result of the interaction of biotic and abiotic components. Anything that can be used as fuel to encourage bacterial development or is a bacteria itself is referred to as a biotic supplement.
In most salt marshes, periwinkle snails can be seen grazing on the cordgrass just above the water line. They mostly focus on the fungi that inhabit the grass, not much of the actual grass itself. But because they munch on the grass, the fungi can spread further throughout the plants.
Thus, Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails. Hence option B is correct.
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The substrate sequence recognized by protein kinase A (PKA) is R-R-G-S-I. The pseudosubstrate sequence found within the regulatory domains of PKA is R-R-G-A-I. Draw each sequence as a peptide. Describe the role of each amino acid (in both sequences).
Answer:
The guanidine group of the first two arginine forms a pair of ions, by which salt bridge is formed
Glycine In both sequence, act as non-polar amino acid and two leucine of enzymes will form a hydrophobic groove. isoleucine fits into the hydrophobic groove.
In R-R-G-S-I serine is phosphorylated by an active catalytic subunit .
In R-R-G-A-I serine is been replaced by alanine
Explanation:
The role of the each amino acids
The guanidine group of the first two arginine forms a pair of ions, by which salt bridge is formed
Glycine In both sequence, act as non-polar amino acid and two leucine of enzymes will form a hydrophobic groove. isoleucine fits into the hydrophobic groove.
In R-R-G-S-I serine is phosphorylated by an active catalytic subunit .
In R-R-G-A-I serine is been replaced by alanine
Attached below is the sequence as a peptide .
what is combustion? What is the equation for the combustion of methane
Answer:
Its the process of burning!
CH4+O2>>CO+H2+H20
Explanation:
A bacterium called Salmonella can cause
food poisoning.which kingdom is it in?
Answer:
monera kingdom
Explanation:
Answer:
The kingdom is Monera Kingdom
Explanation:
How did Pasteur’s experiment with the flasks help disprove the idea that living things could just appear or come from nonliving things like water and air?
Answer
Through a curved flask
Explanation:
Before Pasteur's experiment, the common belief was that of spontaneous generation. That is, that living things could exist from non living things. Therefore, it was assumed that if you boiled a pot of broth and left it exposed, microorganisms grew in it from non-living air particles, not pre-existing microorganisms. Pasteur disproved this by creating a curved flask, that would allow air to enter the liquid, but was not big enough to allow microorganisms to enter the flask. Thus, all the microorganisms got stuck in the curve, and no organisms were found in the broth even with air exposure.
Which is an example of an analogous structure?
A horses and cows having four legs
B whales and sharks having dorsal fins
C chickens and ducks laying eggs
D frogs' and toads' hind legs
Answer:
B whales and sharks having dorsal fins.
Explanation:
Hope this helps!
The process of ecological change in a community over time
Answer:
Ecological succession is the process of change in the species structure of an ecological community over time. ... It is a phenomenon or process by which an ecological community undergoes more or less orderly and predictable changes following a disturbance or the initial colonization of a new habitat.
Explanation:
RNA differs from DNA in three ways. They are
1.
2.
3.
Answer:
below!
Explanation:
"RNA is single-stranded while DNA is double-stranded.
RNA contains uracil while DNA contains thymine.
RNA has the sugar ribose while DNA has the sugar deoxyribose."
-DNA vs RNA Expii
Hope this helps! :)
Is this correct?
LOOK AT IMAGES!!!
Answer:
i think the second question is the answer in the middle, im not sure about the first one.
Explanation:
Hi!~
Answer:
Option one is: Incorrect, the best option is A)
Option two is Incorrect, the answer is B) Kittens are not exposed to humans and new situations early on.
Explanation:
Option 1: Option A makes the most sense, but I might be wrong! :(
Option 2: If a kitten is born in the streets, the kitten grows up not knowing people, so those cats are afraid of people. The option you chose is saying that if you raise your cat then put it outside, the cat becomes feral- This is incorrect, because the cat grew up with humans.
I hope this helps!~ <3
Which condition leads to a slower rate of weathering?
O porous rocks
O cold climates
O hard minerals
O high temperatures
Answer:
I would say cold climates. The only other answer would be hard minerals.
Explanation:
The condition responsible for a slower rate of weathering is cold climate.
What is weathering?
Weathering is the disintegration of rocks, soils and minerals as well as wood and artificial materials, usually assisted by high temperatures.
Factors responsible for weatheringWaterAtmospheric gasesAnimals, etcThus, the condition responsible for a slower rate of weathering is cold climate.
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What would be the most likely result if humans stopped burning fossil fuels?
A. Greenhouse gases levels would decrease
B. The polar ice caps would melt more quickly
C. There would be less oxygen in the atmosphere
D. Global warming would increase
Answer:
A. Greenhouse gases levels would decrease.
Explanation:
Hope this helps!
Answer:
A. Greenhouse gases levels would decrease
Explanation:
Burning fossil fuels like coal, oil and natural gas for energy releases greenhouse gases like carbon dioxide and methane into the atmosphere. These greenhouse gases contribute to global warming by trapping heat in the atmosphere. If humans stopped burning fossil fuels, it would dramatically reduce the amount of new greenhouse gases being emitted. This would allow atmospheric greenhouse gas levels to gradually decrease over time as natural processes absorbed some of the excess gases.
The other answers are not likely results:
B. The polar ice caps would melt more quickly - Stopping fossil fuel combustion would actually help slow the melting of polar ice caps by reducing global warming.
C. There would be less oxygen in the atmosphere - Fossil fuel combustion does not significantly impact atmospheric oxygen levels.
D. Global warming would increase - Ending fossil fuel use would lead to less global warming in the long run by reducing greenhouse gas emissions.
So in summary, the most immediate and likely result of humans stopping fossil fuel combustion would be decreasing levels of greenhouse gases in the atmosphere, as option A states. This would then help slow climate change impacts like polar ice melting.
TTT 18. All of the following are chemical approaches to control micro-organism excepts: A. Antibiotics B. Disinfectants 19. The scientific name for modern man is C. Antiseptics D. Autoclaving A. Homo erectus B. Homo sapiens 20. In which of the following kingdoms are prokaryotic organisms placed? A. Fungi B. Protest C. Australopithecus D. None C. Planate D. Monera 21. Plants which have true roots, leaves, stem & seeds inside the fruit are A. Gymnosperm C. Mosses D. Ferns B. Angiosperm 22. Which of the following taxonomic groups contains closely related organisms? A. Genus C. Phylum B. Order D. Class 23. Malaria causing single celled parasitic protozoan is called A. Paramecium B. Salmonella C. Mosquito D. Plasmodium 24. Which one of the following kingdoms is consists of eukaryotic organisms such as yeast moulds and mushrooms? A. Ecosystem B. Population 26. Which of the following organism are consumers? A. Photosynthetic B. Chemosynthetic bacteria C. Green plant D. Scavengers Answer the following questions. C. Kingdom monera D. Kingdom plantae A. Kingdom fungi B. Kingdom protista 25. Ecology is a biological science that deals with all of the following except C. organism D. none
All of the options are chemical approaches to control micro-organism excepts: B Disinfectants
19. The scientific name for modern man is: B. Homo sapiens
20. kingdoms are prokaryotic organisms placed D. Monera
21. Plants which have true roots, leaves, stem & seeds inside the fruit are: B. Angiosperm
22. taxonomic groups contains closely related organisms A. Genus
23. Malaria causing single-celled parasitic protozoan is called: D. Plasmodium
24. kingdoms consists of eukaryotic organisms such as yeast, molds, and mushrooms A. Kingdom fungi
25. Ecology is a biological science that deals with except: D. none
26. The organism that are consumer is D. Scavengers
What is the chemical approaches to control micro-organismDisinfectants are special chemicals that are used to kill germs or prevent them from growing on surfaces or objects. They are not usually used to control microorganisms within living things, unlike antibiotics, antiseptics, and autoclaving, which are all chemicals used to control microorganisms.
Homo sapiens is the fancy name used by scientists to refer to regular, everyday humans This is the species that humans are a part of.
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18. All of the following are chemical approaches to control micro-organism excepts: A. Antibiotics B. Disinfectants
19. The scientific name for modern man is C. Antiseptics D. Autoclaving A. Homo erectus B. Homo sapiens
20. In which of the following kingdoms are prokaryotic organisms placed? A. Fungi B. Protest C. Australopithecus D. None C. Planate D. Monera
21. Plants which have true roots, leaves, stem & seeds inside the fruit are A. Gymnosperm C. Mosses D. Ferns B. Angiosperm
22. Which of the following taxonomic groups contains closely related organisms? A. Genus C. Phylum B. Order D. Class
23. Malaria causing single celled parasitic protozoan is called A. Paramecium B. Salmonella C. Mosquito D. Plasmodium
24. Which one of the following kingdoms is consists of eukaryotic organisms such as yeast moulds and mushrooms? A. Ecosystem B. Population
25. Ecology is a biological science that deals with all of the following except Answer the following questions. C. Kingdom monera D. Kingdom plantae A. Kingdom fungi B. Kingdom protista C. organism D. none
26. Which of the following organism are consumers? A. Photosynthetic B. Chemosynthetic bacteria C. Green plant D. Scavengers
what is the resting phase of the cell cycle called?
A. Prometaphase
B. Mitosis
C. Interphase
The resting phase of the cell cycle is called interphase.
Interphase is a critical stage in the cell cycle during which the cell prepares for division by going through different activities such as growth, DNA replication, and protein and organelle production. It is the longest phase of the cell cycle and is separated into three subphases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
The cell develops in size, synthesises RNA and proteins, and performs its regular duties during the G1 phase. The cell enters the S phase after passing through the G1 checkpoint. The DNA of the cell is reproduced during the S phase, resulting in the production of two identical copies of each chromosome.
This ensures that during cell division, each daughter cell receives a complete set of genetic material. The cell enters the G2 phase after DNA replication, where it continues to expand and prepares for mitosis.
Interphase is not a real resting phase because the cell is actively engaged in multiple cellular functions. However, because the cell is not visibly dividing at this period, it is commonly referred to as the resting phase.
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what's the difference between the leaf cell and root cell in osmosis and physiological support
Answer: Cells in plant roots do not contain chloroplasts because they are not exposed to light. The chloroplasts contain green pigments called chlorophyll.
Explanation:
Explain how this experiment showed that genetic drift was not a cause of the antibiotic resistance
By demonstrating a consistent pattern of antibiotic resistance increase rather than random fluctuations, the experiment provided evidence against genetic drift as a significant cause of antibiotic resistance in the studied bacterial population.
To explain how an experiment showed that genetic drift was not a cause of antibiotic resistance, let's consider the following scenario:
In the experiment, a population of bacteria with varying levels of antibiotic resistance was divided into two separate groups: Group A and Group B. Each group was kept in separate environments and exposed to the same antibiotic over a period of time.
If genetic drift were a significant factor in the development of antibiotic resistance, we would expect to observe random fluctuations in resistance levels within each group over time, leading to divergent resistance patterns between the two groups.
However, the experiment showed that both Group A and Group B displayed a consistent increase in antibiotic resistance over time. This implies that there was a selective pressure favoring the bacteria with higher resistance, indicating that natural selection, rather than genetic drift, was driving the increase in resistance.
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In general, when performing spread plates, __________
mL of cell suspension is added to the plate to prevent the formation of a microbial ______________.
Adding more than 1 mL of cell suspension to an agar plate will result in a ____________.
Adding less than 1 mL of cell suspension to an agar plate will result in a ____________.
Answer:
a) 0.1 mL
b) contamination
c) clumping of colonies
d) Uneven colonies
Explanation:
In general, when performing spread plates, 0.1 mL
mL of cell suspension is added to the plate to prevent the formation of a microbial contamination
Adding more than 1 mL of cell suspension to an agar plate will result in a clumping of colonies.
Adding less than 1 mL of cell suspension to an agar plate will result in a Uneven colonies
In general, when performing spread plates, 0.1mL of cell
suspension is added to the plate to prevent the formation of a
microbial contamination.
Adding more than 1 mL of cell suspension to an agar plate will
result in a clumping of colonies. Adding less than 1 mL of cell
suspension to an agar plate will result in an uneven colony.
What is a Colony?
These contain two or more conspecific individuals living in close
association with one another.
The procedures given above must be adhered to in the
preparation of cell cultures in the laboratory.
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For Phase 1, the therapeutic modalities used generally will be ones that decrease blood flow.
O a. True
O b. False
Answer:
A.TRUE
yan po yung answer
Making Inferences Why do
you feel pain when you pull on
your hair or nails, but not when
you cut them?
Answer:
because the pain in our body is from the skin or tissue so when you pull the hair you are actually up rooting it from its attachment with ur skin hense you feel the pain
n pea plants, the gene for the color of the seed has two alleles. In the Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Punnett Square showing a grid that is blank with 4 empty boxes, two columns and two rows. The female parent plant across the horizontal side, top, of the grid indicates a yellow phenotype and a genotype of Yy. The male parent plant along the vertical side of the grid indicates a yellow phenotype and a genotype of YY.
Based on the Punnett square, what percentage of offspring would have genotype YY?
0%
25%
50%
100%
None of the progeny would have a gene of YY, according to the Punnett square. The genotypes of the parents are Yy for the female parent and YY for the male parent. The male parent's potential gametes are Y and Y, and the female parent's potential gametes are Y and Y.
These gametes can result in children with either the YY or the Yy genotype. Punnett's square, however, demonstrates that each child will have the genotype Yy and none will have the genotype YY. Consequently, 0% of the children have the genotype YY.
Punnett's squareThe potential results of a DNA cross between two people are visualized using a Punnett square. It is called after British geneticist Reginald Punnett, who created the idea in the early 20th century.
Each of the four spaces that make up the square represents a potential allele combination from each parent. Along the upper and left sides of the square, the alleles are listed.
Along the upper and left sides of the square are lists of the potential gametes from each parent. The potential genotype of the offspring arising from the fusion of the two gametes is represented by the box where each row and column intersect.
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Answer:
0 %
Explanation:
Question: Will weather changes (drought/flooding) over time cause changes in the beak depth of a bird population? Write your response in space provided. Refer to the rubric at the end of the page when writing your response.
HELP ASAPPPPPPPPP THE ANSWER IS BLURED ON COURSE HEROOO!!!!!
Answer:
In times of severe drought, the average beak depth increases to handle the limited food supply. With only tough seeds to eat, a large beak is needed. Due to a large beak being needed, the small and medium beaked finches died out after 5 years as they were unable to adapt to these new conditions.
Explanation:
Answer:
help hoy sjshsu Kroos isnsus isns
What causes "red tides"?
Answer:
A "red tide" is a common term used for a harmful algal bloom. This bloom, like many HABs, is caused by microscopic algae that produce toxins that kill fish and make shellfish dangerous to eat. The toxins may also make the surrounding air difficult to breathe.
Explanation:
Answer:
microscopic algae
Explanation:
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( . .) (. . )
( づ hope this helped! ⊂ )
Which state of matter is most likely represented in the image?
O Gas
Solid
Liquid
O Plasma
Answer:
gas
Explanation:
25 POINTS + BRAINLIEST PLEASE HELP
If a cell's lysosomes were damaged and stopped functioning, the cell would
not be able to break down necessary nutrients
not be able to direct protein construction
lose structure, shape, and the ability to move
lose the ability to release waste products
The unit of force is the:
pound
newton
foot
gram
Answer:
Force has units of Netwons
A biochemical Lugol test involved dropping iodine on a cracker and observing
whether the reagent changes color or not. If this test indicated that starches are
present, which monomer would be associated with this test?
Answer:
glucose
Explanation:
Starch is composed of glucose monomers linked by glycosidic bonds.