Answers
The percentage change in the mass of the potato cylinders is both positive and negative because the concentrations of the sugar solutions differ.
OsmosisIn biology, osmosis refers to the movement of water molecules from regions of low solute concentrations or high water potentials to regions of high solute concentration or low water potential through a semi-permeable membrane.
Solutions with high solute concentrations as compared to the sap of cells are said to be hypertonic to the cells. The cells, will, therefore, lose water to hypertonic solutions.
Solutions with the same solute concentrations as cells are said to be isotonic to the cells. There is no net movement of water between such solutions and the cells.
Solutions with lower solute concentrations as compared to cells are said to be hypotonic to the cells. Such solutions lose water to the sap of the cells.
This is exactly what happened in the case of the solutions and the potato cylinders. Hypertonic sugar solutions will cause the potato cylinders to lose water and weigh less than their initial weights. This will return a negative percentage change in weight.
Hypotonic solutions, on the other hand, will cause the potato cylinders to gain water and weight more than their initial weights. This will return a positive percentage change in weight.
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Related Questions
what is name of the new island off iceland that has begun succesion since 1963?
Answers
Answer: Surtsey
Explanation:
Surtsey is a new island formed by volcanic eruptions in 1963-67.
You probably know that you need to breathe oxygen to survive. But how does your body use that oxygen? That oxygen helps your body to release _____ energy that is stored in _____ and other carbon based molecules. The energy is _____ to produce _____. This process of using _____ to produce _____ by breaking down _____ molecules is called _____.
Answers
That oxygen helps your body to release chemical energy that is stored in sugars and other carbon based molecules. The energy is released to produce ATP. This process of using oxygen to produce ATP by breaking down carbon-based molecules molecules is called cellular respiration.
What is cellular respiration?In Science, cellular respiration can be defined as a series of metabolic chemical reactions that typically occur in both prokaryotic and eukaryotic cells within living organisms, in order to produce energy in the form of adenosine triphosphate (ATP).
Generally speaking, the first step of cellular respiration is a biological and chemical process that is referred to as glycolysis.
In conclusion, we can reasonably infer and logically deduce that all living organisms such as humans, animals, eukaryotes, etc., breathe in oxygen and exhale carbon dioxide in order to survive, which occurs through a process that is referred to as cellular respiration.
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The largest carbon reservoir on Earth is coal.
True
False
Answers
Answer:
True this is the answer bro
is this molecule...
a. fatty acid
b. straight chain sugar
c. nitrogenous base
Answers
Answer: a. Fatty Acid
Explanation:
A fatty acid is a carboxylic acid with a long side chain of hydrocarbons. Most fatty acids contain an even number of carbon atoms in the hydrocarbon chain and follow the general molecular formula of CH3(CH2)xCOOH where x is the number of carbon atoms in the hydrocarbon chain.
what is the meaning of cell division
Answers
Answer:
mitosis and meiosis.
Explanation:
There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life.
describe how genes are related to the structure and function of proteins
Answers
Explanation:
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble proteins)
Answer:
Proteins are composed of long chains of amino acids organized into a specific order. Genes provide the instructions for making the amino acid chains that are then assembled into proteins.
Chlorophyll a and bare
examples of what inside.
a chloroplast that
absorbs light energy?
A. Chloroplasts
C. White light
B. Thylakoids
D. Pigments this
Answers
Answer:
D. Pigments
Explanation:
Chlorophyll contains pigments (650; 700) which absorbs light
What evidence does the author provide to support the claim that genetic engineering has led to the advancement of
medical science?
OA. Genetic engineering involves processes such as genetic fusion that can be used to engineer the human gene
structure of cells, thereby creating improved or more advanced organisms.
B.
Genetic engineering alters the existing gene structure of an organism to create a new organism or to improve
certain chacteristics of the organism to improve its functioning.
OC. Genetic engineering allows for the production of genetically modified organisms (GMO), such as the first ever
type of insulin-producing bacteria that functions on a newer and improved level than the existing organism.
D. Genetic engineering allows scientists to artificially enhance genetic structure and holds the potential to cure
deadly diseases in humans that have no known cure.
Answers
The author provide evidence to support the claim that genetic engineering is Genetic engineering alters the existing gene structure of an organism to create a new organism or to improve certain characteristics of the organism.
Genetic engineering, also referred to as genetic alteration, is a process that uses technologies created in laboratories to change an organism's DNA. This could have adding new DNA, deleting a segment of DNA, or changing a single base pair (A-T or C-G).
Among other things, genetic engineering has been utilized in science and industry to create cancer therapies, brewing yeasts, and genetically modified plants and animals. As a component of GM technology, DNA is put into the genome of an organism. To produce a GM plant, new DNA is inserted into plant cells.
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Molecular basis of non infectious diseases
Answers
Answer:
NCDs share four major risk factors: tobacco use, physical inactivity, the harmful use of alcohol and unhealthy diets.
Explanation:
Some fungi live with other
organisms in a beneficial
relationship.
Which of the following is one of
these relationships?
A. fungi and fish
B. fungi and green algae this
C. fungi and mammals
D. fungi and reptiles
Answers
Answer:B
Explanation: Fungi and green algae have a symbiotic relationship because the fungi gets pigment from the algae and the algae helps with absorbing water from the help of the fungi
Answer:
b) fungi and green algae
Explanation:
Some fungi live with other organisms in a beneficial relationship. Fungi and green algae is one of these relationships. Hence, the option (b) is correct answer.
Which model—conservative, semiconservative, or dispersive—is the model we now know is correct?
Answers
Answer: Semi-Conservative
Explanation:
The strands separate as seen in the figure and are used to create new strands.
Define the word scavenger.
Answers
Explanation:
1. an animal that feeds on carrion, dead plant material, or refuse.
2. a person who searches for and collects discarded items.
Chlorophyll in the
chloroplast reflects which
color on the spectrum of
visible light?
A. red
C. violet
B. blue
D. green
Its green
Answers
Chlorophyll in the chloroplast reflects green color on the spectrum of
visible light.
What is chlorophyll?
The ability to produce their own nourishment exists in green plants. They achieve this through a process known as photosynthesis, which makes use of the green pigment chlorophyll. A molecule with a specific color known as a pigment can absorb light at various wavelengths depending on the color. Although there are many various kinds of pigments in nature, chlorophyll is special in that it allows plants to absorb the energy they require to develop tissues.The little structures called chloroplasts found in a plant's cells are where chlorophyll is found. This is the location of photosynthesis.Each pigment has a distinctive absorption spectrum that illustrates how it absorbs or reflects various light wavelengths. Chlorophyll and other pigments used in photosynthesis absorb wavelengths, creating electrons that power photosynthesis. All visible light wavelengths, with the exception of green, are absorbed by chlorophyll, the green pigment found in all photosynthetic cells. Because of this, plants seem green to us.
Hence, Chlorophyll in the chloroplast reflects green color on the spectrum of visible light.
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Describe two similarities in the structure of the organic molecules shown.
Answers
1 . They all contain carbon. Most of them are flammable.
2 . They are all soluble in non-polar solvents. They are mostly, are covalently bonded molecules.
Amino acids and nucleic acids are two examples of biomolecules found inside cells. C, H, O, as well as N make up amino acids and nucleic acids alike.
The basic building elements of the body, amino acid residues, are strung together to form peptides, which are then joined together by acids linked by peptide bonds proteins. The fundamental distinction is that peptides are composed of shorter molecules called amino acids versus proteins.
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If a woman with normal vision that carried an allele for color blindness X N X n married a man with normal vision(XNY), what would be their possible offspring
Answers
The fovea capitis helps connect the
Answers
The fovea capitis helps connect the femur to the hip.
What is fovea capitis?
The head (or ball-shaped end) of the femur has a small, oval-shaped indentation on top called the fovea capitis.It has a triangle-like form. Its base has a connection on one side to the hip socket at one end. The opposite side is joined to the other end. The triangle's tube-shaped top is joined to the femoral head at the fovea capitis.What is the function of fovea capitis?
The ligamentum teres (LT) is found in the fovea capitis. One of the big ligaments that attaches the femoral head to the pelvis.The round ligament or ligament capitis fumoirs are other names for this ligament.In infants, the LT stabilizes and transports the blood flow to the femoral head.Therefore, the fovea capitis helps to connect the femur to the hip bone.
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What advantages does a coelom provide the earthworm and the salamander?
Answers
Explanation:
The coelom refers to the body cavity derived from mesoderm germ layer and mainly found in multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs.
There are many advantages that coelom provides to the earthworm and the salamander. The digestive system of earthworms and salamanders is more complex, here coelomic fluid helps their body processes and assists as a hydrostatic skeleton.
The coelom's main advantage is its flexibility. The internal organs for example the heart, liver, lungs, and intestines develop, and they help to push into the coelom. The fluid of the coelom diminishes the organs for protecting the organs and also enables them to turn, bend, shift and move. In this way, coelom helps the animals internally to finish and run the system inside in the correct way. Coelom helps the earthworms and salamanders in building the correct system and protecting their organs to maintain and enable them to function properly.
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According to the cell theory cells from different organisms of function because they
Answers
Answer:
They are basic functional unit of life
An example of a relationship
where one organism gains but
the other is harmed would
be...
A. a tick on a deer.
B. a bird building a nest in a tree.
C. a fish swimming upstream.
Answers
Answer:
a) a tick on a deer.
Explanation:
A tick on a deer is an example of a relationship where one organism gains but the other is harmed.
Here the tick gets energy, but the deer loses its blood. Therefore, the option (a) is the correct answer.
URGENT
A steroid hormone approaches its target cell. Which will happen first?
The hormone will enter the nucleus
The hormone will combine with proteins to form lipoproteins
The hormone and its receptor will interact with the DNA
The hormone and its receptor will enter the cell’s nucleus
Answers
A steroid hormone approaches its target cell, therefore the hormone will enter the nucleus and is what will happen first which is therefore denoted as option A.
What is a Hormone?This is referred to as a chemical messenger which is released directly into the bloodstream and is responsible for the control of certain metabolic reactions occurring in the cell and an example is steroid hormone such as androgens.
In a situation whereby a steroid hormone approaches its target cell, it first passes through the plasma membrane before it then becomes adhered to the receptors which are present in the nucleus or cytoplasm.
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Cystic fibrosis is caused by
a mutation in the affected
individual's DNA.
What type of mutation
causes cystic fibrosis?
A. the addition of several different
codons
B. the loss of one base
C. the loss of a whole amino acid (3
base pairs) this
D. the CAG codon repeating at least 40
times
Answers
Cystic fibrosis is caused by a mutation in the affected individual's DNA therefore the type of mutation which causes cystic fibrosis is the loss of a whole amino acid (3 base pairs) and is denoted as option C.
What is Mutation?This is referred to as the change in the DNA sequence of an organism and it often occurs when there is an errors in DNA replication during cell division.
Cystic fibrosis is caused by the loss of a whole amino acid (3 base pairs) from the cystic fibrosis transmembrane conductance regulator gene which was why it was chosen as the correct choice.
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PLEASE HURRY WILL MARK BRAINIEST ⚠️⚠️
This diagram shows a plant cell. Which structure is found in a plant cell but is absent in an
animal cell?
A- 3
B- 1
C- 2
D- 4
Answers
Differentiate between the lysogenic and lytic cycles. (1 point)
Viral proteins are synthesized during the lysogenic cycle.
O The virus injects DNA into the host cell during the lysogenic cycle.
O The host cell is destroyed during the lytic cycle.
O The host cell copies its own DNA during the lytic cycle.
Answers
Differentiate between the lysogenic and lytic cycles The virus injects DNA into the host cell during the lysogenic cycle.
The lytic cycle includes the replica of viruses using a number cellular to fabricate greater viruses; the viruses then burst out of the cellular. The lysogenic cycle involves the incorporation of the viral genome into the host cellular genome, infecting it from inside.
Inside the lytic cycle, the viral genome does no longer comprise into the host genome. within the lysogenic cycle, the viral genome consists of into the host genome and stays there throughou The main difference among lytic cycle and lysogenic cycle is that lytic cycle destroys the host cell while lysogenic cycle does no longer spoil the host mobile
The primary difference between lytic cycle and lysogenic cycle is that lytic cycle destroys the host cell whereas lysogenic cycle does not destroy the host cell. Viral DNA destroys the host cell DNA and arrests the cellular features within the lytic cycle. but, in the lysogenic cycle, viral DNA may merge with the host.
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Only a small amount of the energy stored in food is available to the next organism in a food chain as a result of which of the following?
Answers
Only a small amount of the energy stored in food is available to the next organism in a food chain as a result of losses to the environment because 90% of energy is lost in the environment as heat.
what is the food chain?A food chain is described as a linear network of links in a food web starting from producer organisms and ending at an apex predator species, detritivores, or decomposer species.
A food chain also shows how organisms are related to each other by the food they eat.
We know that energy is passed up the food chain from one trophic level to the next but only about 10 percent of the total energy stored in organisms at one trophic level is actually transferred to organisms at the next trophic level. The reason for this is that he rest of the energy is used for metabolic processes or lost to the environment as heat
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PLEASE HELP…*image provided*
Answers
. How did Mendel study heredity?
Answers
Answer:
Explanation:
By experimenting with pea plant breeding, Mendel developed three principles of inheritance that described the transmission of genetic traits, before anyone knew genes existed. Mendel's insight greatly expanded the understanding of genetic inheritance, and led to the development of new experimental methods.
hope it helps! :)
Challenges in sustainable development
can you explain this diagram.. I will mark you brainlist..
help... !!!!
Answers
Answer:
Explanation:
environment is first then society then economy
A Haiku about the sea floor spreading
Answers
A Haiku about the sea floor spreading is given below:
The Seafloor Spreading
Spreading with dirt and plastics
Leaving sea life dying
What is Haiku?Haiku is a seventeen-syllable Japanese poetry with three lines of five, seven, and five syllables that generally evoke pictures of the natural world.
These are the rules for creating haiku:
There are a total of 17 syllables.Haiku is only three lines long.The first line of a Haiku typically contains 5 syllables, the second line has 7 syllables, and the third line has 5 syllables.Avoid titles and rhyme (both of which are almost never used in haiku), as well as metaphor, simile, and most other rhetorical elements (they are often too abstract or detour around the directness exhibited in most good haiku).
Haikus are historically derived from the Japanese Hokku. Hokkus are group poetry that adhere to the 5/7/5 formula. They are intended to comment on the writers' season or surroundings and to generate some form of contrasting visual split by a kireji or "cutting word."
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Currently, new regulations control the use of pesticides and chemical fertilizers to reduce what?
Answers
Pesticides and fertilizers create water and air contamination and significant health consequences. Chemicals are regulated to reduce water contamination.
What are pesticides?Insecticides, fungicides, and nematicides are all examples of pesticides. It is essential to exercise population control over the unwanted organisms and insects that cause severe damage to the crops. On the other hand, pesticides can never be used in excess, as this would have a negative impact on living things.
Fertilizers are added to the soil in order to improve its fertility and thus the development of plants. In addition, they contain hazardous substances.
Both insecticides and fertilizers are known to include compounds that are potentially harmful. These chemicals almost certainly will lead to the contamination of water and air, in addition to causing health problems for the organisms in the surrounding area.
Contamination of water is a critical problem that has been on everyone's minds for a considerable amount of time. It is possible to lessen the amount of water contamination by lowering the amount of pesticides and fertilizers that are used.
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A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years ago did two species share a common ancestor, if the molecules found in these two species differ by a total of eight mutations?
1.5 million years
10 million years
40 million years
20 million years
Answers
20 million years ago two species share a common ancestor, if the molecules found in these two species differ by a total of eight mutations.
Neutral mutations play an major role in the phenomenon of evolution because they generally take place at a consistent rate over time.
Every time when a genome is passed from one generation to another , a small error is responsible for changing the base sequences. So the mutation rate in the genome copy is calculated by both the rate of error per copy and the number of copies made per unit time. Both of these factors may be impacted by species biology.
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