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Introducción to Biochemistry: Mastery Test
1
Select the correct answer.
Why might two elements possess similar chemical properties?
ОА.
They belong to the same group of the periodic table.
OB. They have the same physical state.
OC. They have similar physical properties.
OD. They belong to the same period of the periodic table.
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Answer:
А. They belong to the same group of the periodic table.
Explanation:
Two elements possess similar chemical properties if they belong to the same group on the periodic table.
What determines the chemical properties of elements;
→ the number of valence electrons an element contains determines its chemical properties.
On the periodic table, groups are vertical arrangement of elements. Periodic groups classifies elements into groups based on the number of valence electrons they contain. So, elements in the same group will have the same number of valence electrons and hence similar chemical properties.The _____________ receives blood from the atrium and pumps it out of the heart.
Answers
Ventricles receive blood from the atrium and pump it out of the heart. The left ventricle pumps oxygenated blood to different parts of the body.
How does the heart pump blood?The heart has four chambers, such as the upper two atriums and the lower two ventricles. The right side of the heart holds the deoxygenated blood, and the left side holds the oxygenated blood.
The deoxygenated blood from different parts of the body is poured into the right atrium through the superior vena cava, inferior vena cava, and coronary sinus. Then, from the atrium, blood moves to the ventricle through the atrioventricular opening.
From the right ventricle, blood moves to the lungs for oxygenation through the pulmonary artery. In the lungs, the oxygenation of blood takes place, and the oxygenated blood comes to the left atrium. From the left atrium, the oxygenated blood comes to the left ventricle. From the left ventricle, blood goes to different body parts through systemic arteries.
Hence, the ventricles receive blood from the atrium and pump it out of the heart.
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Which sense of tiger is strong and how this smell help the animal in finding the fodd
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The sense of smell in tigers is highly developed and serves as a critical tool for survival. It helps them locate prey, establish territories, detect potential threats, and identify reproductive opportunities. The acute sense of smell in tigers enhances their hunting efficiency and contributes to their overall adaptation as top predators in their habitats
The sense of smell in tigers is particularly strong and plays a crucial role in their survival. Tigers have a highly developed olfactory system, equipped with specialized receptors in their nasal cavity that allow them to detect and discriminate various odors in their environment.
The sense of smell is essential for tigers when it comes to finding food. Tigers are carnivores and rely on hunting to sustain themselves. Their acute sense of smell helps them locate potential prey, even from a distance. Tigers can detect the scent of other animals, such as deer or wild boar, which enables them to track and stalk their prey effectively.
The olfactory system of tigers allows them to detect not only the presence of potential prey but also to gather information about the prey's location, health, and even reproductive status. They can identify the scent markings left by other tigers, which help them establish and defend their territories. Additionally, tigers can use their sense of smell to detect the presence of rival tigers or potential threats in their surroundings.
The ability to smell plays a vital role in a tiger's hunting strategy. Tigers often rely on ambushing their prey, and a keen sense of smell allows them to analyze the scent trails left by potential prey, determining their direction and estimating the distance to their target. This helps tigers plan their approach and execute precise and efficient hunting strategies, increasing their chances of a successful kill.
Moreover, a tiger's sense of smell is not only limited to locating prey but also plays a role in identifying potential mates. During the breeding season, female tigers release pheromones that indicate their receptiveness to mating. Male tigers can detect these scents and use them to locate and court females.
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Feedback loops are designated as positive or negative. Which statement is correct regarding feedback loops?
A. Positive feedback is good, negative feedback is bad.
B. Positive feedback loops are the most common in nature.
C. Positive feedback loops return systems to normal.
D. Positive feedback loops can drive a system to extremes.
Answers
Answer: option D is teh answer
Answer:
CORRECT (SELECTED)
Positive feedback amplifies signals and negative feedback opposes signals.
Explanation:
Positive feedback loops amplify a starting signal while negative feedback loops act to oppose the triggering stimulus.
Name one trait/advantage that cell organization during blastula stage allows.
Answers
The blastula in mammals develops into the blastocyst within the next stage. The inner cell mass and an outdoor layer known as the trophoblast are the two layers in which the cells of the blastula are arranged here. The inner cell mass, sometimes mentioned as the embryo blast, is where the embryo will eventually develop.
What about cells?The blastocyst, which is made from the blastula, eventually undergoes gastrulation to become an embryo. Until the transition stage, when the gastrula is produced and becomes more specialized, the blastula's purpose is to divide quickly with fewer cells.The smallest biological unit capable of supporting life on its own and constituting both all living things and bodily tissues.The cell membrane , the nucleus, and thus the cytoplasm are the three primary components of a cell.There are many billions of cells within the human body.They provide the body structure, absorb nutrients from meals, turn those nutrients into energy, and perform certain tasks.Intricate arrangements of microscopic fibers and hundreds or even thousands of tiny, unique structures mentioned as organelles can be found in the cytoplasm.All living things have cells as their fundamental building blocks.Cells provide the structure, absorb nutrients from meals, and perform critical tasks.Cells are often elongated, spherical, or circular.Some cells have lengthy ends that are pointed.They have a spindle-like appearance.Sometimes, cells might be rather lengthy.Some have branches, kind of a neuron or a nerve cell.Learn more about cell here:
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Explanation:
Blastula-stage cells can behave as pluripotent stem cells in many species. Pluripotent stem cells are the starting point to produce organ specific cells that can potentially aid in repair and prevention of injury and degeneration.
What human behavior was the cause of the Nipah virus outbreak in Bangladesh? How did scientists determine this?
Answers
Answer:
Humans drinking raw date palm sap was the cause of the Nipah virus outbreak in Bangladesh. Scientists found Nipah virus in bat excretions and discovered that bats were contaminating date palm juice with their excretions (saliva, urine).
Explanation:
Nipah virus can spread to people from:
1) Direct contact with infected animals, such as bats or pigs, or their body fluids (such as blood, urine or saliva).
2) Consuming food products that have been contaminated by body fluids of infected animals (such as palm sap or fruit contaminated by an infected bat).
Rabbits in most areas have a brown coat. The arctic hare has a bright white coat in
winter. How does the arctic hare's white color help it survive?
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Answer:
Indeed, rabbits, in most of the planet, tend to have their fur colored brown, copper or other similar shades. Now, in the Arctic regions, these animals do not have this color, but a white one, similar to the environment that surrounds them. This is so because these animals, for evolutionary reasons, have adapted their fur to the snowy environment that surrounds them in the Arctic, in order to avoid being detected by potential predators, protecting themselves and trying to ensure their survival.
1. What are the functions of the kidney? Select all that apply.
filters blood
controls body’s fluid balance
produces enzymes
balances electrolytes
produces hormones
2. Which organ controls the body’s fluid balance?
liver
kidney
gallbladder
pancreas
3. What are the functions of the pancreas? Select all that apply.
produces enzymes
stores bile
controls body’s fluid balance
produces hormones
4. Which organ makes hormones to regulate metabolism?
liver
kidney
gallbladder
pancreas
5. What are the functions of the liver? Select all that apply.
filters poisons from the blood
converts nutrients to glucose
controls body’s fluid balance
stores bile
PLEASE MAKE IT AS CLEAR AS POSSIBLE AND 5 POINTS FOR EACH QUESTION SO 25 POINT TOTAL WILL REPORT IF NOT ALL QUESTIONS ARE ANSWER BUT PLEASE BE QUICK BC IM IN THE TEST NOW.
Answers
Answer:
Filters blood and Controls the body’s fluid balance.
Explanation:
A kidney is made up of nephrons that contain filters to remove wastes and extra fluid as urine.
During an evening hike, you see a shooting star just like the one pictured here.
In which layer of the atmosphere does this shooting star occur?
troposphere
stratosphere
mesosphere
thermosphere
Answers
The shooting star occurs in the mesosphere, which is the layer of the atmosphere above the stratosphere and below the thermosphere.
The shooting star observed during an evening hike occurs in the mesosphere. Shooting stars, also known as meteors, are visible when small particles, typically from comets or asteroids, enter the Earth's atmosphere and burn up due to friction with the air molecules. The mesosphere is the third layer of the Earth's atmosphere, located above the stratosphere and below the thermosphere. It extends from about 50 to 85 kilometers (31 to 53 miles) above the Earth's surface. In the mesosphere, the air is thin and the temperature decreases with altitude. This layer is where most meteors burn up and produce the phenomenon of shooting stars that we observe from the ground.For more such questions on Mesosphere:
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Watch the virtual lab demonstrating DNA extraction. In this experiment how do the lysis solution in the salt solution vary by function?  Watch the virtual lab demonstrating DNA extraction.
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Answer:
Explanation:DNA extraction is isolation of DNA from the cell
First of all lysis solution is a buffer solution that serves the purpose of breaking those open cells in the experiment of DNA extraction .
Lysis solution is mainly buffer and ionic salts,they create isolated environment for the components of the cell.
The lysis solution contain more than one salt.This salt develops ionic strength in the solution.
In a population of cattle, the average body fat percentage is 10.5%. You select parents with an average body weight percentage of 20.8%. The offspring they produce have an average body weight percentage of 17.6%. Based on these data, what is the narrow-sense heritability of this trait
Answers
Heritability in the narrow sense -h²- refers to the proportion of the phenotypic variability that is influenced by genetic factors. In the exposed example, the narrow-sense heritability of this trait is h² = 0.689 ≅ 0.7
-----------------------------
Before answering the question, let us first review a few concepts.
The selection differential, SD, is calculated by getting the difference between the mean value of the desired trait in the population (X₀) and the mean value of the same trait expressed by parents, (Xs). So,SD = Xs - X₀
Heritability in the narrow sense -h²- is the measure of the genetic component to which additive genetic variance contributes.It referes to the proportion of the phenotypic variability that is influenced by genetic factors.
The heritability might be used to determine how the population will respond to the selection done, R.
h² = R/SD
The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h² with the selection differential, SD.R = h²SD
R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),
R = X₁ - X₀
Now that we know these concepts and how to calculate them, we can solve the proposed problem.
Available data:
Population average body fat ⇒ 10.5% ⇒ X₀ Selected parents average body weight ⇒ 20.8% ⇒ XsOffspring average body weight ⇒ 17.6% ⇒ X₁We ned to get the narrow-sense heritability of this trait, h².
h² = R/SD
R = X₁ - X₀ = 17.6% - 10.5% = 7.1%SD = Xs - X₀ = 20.8% - 10.5% = 10.3%
h² = R/SD = 7.1% / 10.3% = 0.689 ≅ 0.7
The narrow-sense heritability of this trait is h² = 0.689 ≅ 0.7
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Challenge: This DNA strand consists of eight pairs of nitrogenous bases. How many different sequences of eight bases can you make
Answers
Answer:
There are four nitrogenous bases that makes DNA. These are A, T, G and C. If a DNA strand has eight pairs of nitrogenous bases, the eight bases can be
1. AA GG TT CC
2. GC GG AT CG
3. AT TA GG GC
4. GA AG GC GG
If we have to make 8 pairs of bases, the number of possible sequences would be 4 to the power 8.
Answer: THERE WILL BE 65,536 DIFFERENT SEQUENCES OF 8 BASES.
Explanation:
Which of the following CANNOT be inferred based solely on the diagram shown below? (select all that apply)
Frog
Lizard
Their DNA is over 90% the same.
- They share a common ancestor.
- Both species evolved from an aquatic animal.
- Both of organisms' embryos have gills.
- They live in the same Environment.
Answers
- Their DNA is over 90% the same.
- They share a common ancestor.
- Both species evolved from an aquatic animal.
- Both of organisms' embryos have gills.
- They live in the same environment.
Without additional information or specific evidence, it is not possible to infer these statements from a diagram alone.
What determines whether an crop is a spring annual,
summer annual, or winter annual?
Answers
Agriculture is commonly described as the science or art of farming. What determines them is climate, temperature, cold, if seed can be sown outdoors in the spring , the ability to withstand early spring and fall frosts and winter temperatures.
Summer annual crops are known to germinate, flower, produce seed, and die by frost amidst the warmer months of the year.Winter annuals often sprout in the late summer and autumn, it is known to be dormant during the winter, and grow during the next spring and summer. its young winter annual plants live through the winter then flower, set seed and die out the following summer.
Winter annuals often bloom in winter or spring. They grows in very low to the ground. Examples are henbit, deadnettle, chickweed etc. Spring annuals are known to sprout early in the spring.
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The diagram shows a simple lipid
Answers
Answer:
the answer is saturated
Explanation:
you decide to halve the time you spend in the shower each day and to turn off the water while you're brushing your teeth and washing your face at the sink. Evaluate the effect that these actions might have on two different aspects of the water cycle if every person in your neighborhood also performed them
Answers
Answer:
If every person in your neighborhood decided to cut the amount of water they use in half, that would have a tremendous positive effect on the water.
Explanation:
Reducing shower time and turning off water while brushing teeth conserves water, benefiting both water supply by preserving sources and reducing demand on treatment facilities.
By halving the time spent in the shower and turning off the water while brushing teeth and washing faces, individuals in the neighborhood can significantly reduce their water consumption. This would have a positive effect on both the supply and demand aspects of the water cycle. On the supply side, the reduced usage would decrease the strain on local water sources such as rivers, lakes, and underground aquifers. It would contribute to the conservation of these resources, promoting their sustainability and maintaining ecological balance.
On the demand side, the reduced water consumption would alleviate the pressure on wastewater treatment facilities, reducing energy requirements for water treatment and decreasing the discharge of treated water back into the environment. Overall, these actions would promote water conservation, help preserve natural water sources, and contribute to a more sustainable water cycle in the neighborhood.
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The complete question is:
You decide to halve the time you spend in the shower each day and to turn off the water while you're brushing your teeth and washing your face at the sink.
Required:
Evaluate the effect that these actions might have on two different aspects of the water cycle if every person in your neighborhood also performed them.
what is the best cancer books which I can read them?
Answers
Medicine, Art, Time, Dreams, Data,
Exhaustion, Cancer, and Care by Anne Boyer. ...
The First Cell: And the Human Costs of Pursuing Cancer to the Last by Azra Raza. ...
The Emperor of All Maladies: A Biography of Cancer by Siddhartha Mukherjee.
3.
Which factor has the greatest effect on a person's human development?
a. biology
b. environment
c. Both A and B
d. Neither A nor B
Answers
Answer:
b
Explanation:
environmental factors play a very important role in the development of an individual
changes in latitude then lead to adaptation by an individual.....whereas some people who don't study biology still develop.
Answer:
A) Biology
Explanation:
I think the environment will have it's greatest effect on social development
What is the end result? Will give brainliest!
Answers
Answer:
B.
Explanation:
Meiosis, in the shortest nutshell, is basically mitosis but twice. So instead of 2 different cells, you get 4 different cells.
In the picture below the purple circles represent salt molecules. Which way would
the water molecules move across the membrane
Right to left toward the higher concentration of salt
Left to right away from the higher concentration of Salt
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Describe the role of GA in a-amylase production and in germination. Provide evidence for your claim
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Gibberellic acid (GA) plays a crucial role in a-amylase production and germination. GA stimulates the synthesis and release of a-amylase enzymes, which hydrolyze starch into sugars during germination. Experimental studies have demonstrated that the application of GA accelerates a-amylase production and enhances germination in various plant species
In terms of a-amylase production, GA stimulates the synthesis and release of this enzyme. a-amylase is responsible for breaking down starch into simpler sugars, which are then utilized by the plant for growth and development.
Studies have shown that applying GA to plant tissues or seeds results in an increased production of a-amylase, facilitating the conversion of stored starch into energy-rich sugars.
Regarding germination, GA is involved in breaking seed dormancy and promoting the growth of the embryonic plant.
It stimulates the production of hydrolytic enzymes like a-amylase, which enable the hydrolysis of starch reserves in the endosperm, providing the energy needed for germination and seedling establishment.
Additionally, GA helps in cell elongation and division, promoting the growth of the embryo and the emergence of the radicle.
Evidence for GA's role in both processes includes studies where the exogenous application of GA to seeds or plant tissues has been shown to enhance a-amylase production and promote germination.
Conversely, inhibiting GA synthesis or action results in reduced a-amylase activity and impaired germination. These findings support the critical involvement of GA in both a-amylase production and germination processes in plants.
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Can someone help me with the answers to some of my questions( I have the answer to some of the them) I need help with questions 4,5,9,19, 21,and 23)
4.A science class is conducting experiments to demonstrate conservation of mass. Both lab groups, A and B, use the same type of candle and burn them for the same amount of time. Which statement most accurately summarizes the expected results of the experiment?
Hint to Answer:Since A is a closed system, the law of conservation of matter will be followed. Since B is an open system, it could be difficult to account for all of the reactants and products.
5. 5. What type of chemical reaction is this?
4 Al + 3 O2 --> 2 Al2O3
A. single replacement
B.synthesis
C.double replacement
D. combustion
9.Match the half-life information to each correct answer.
Remember to use the table below or use your fingers like we did in class.
*Oxygen-22 has a half life of 2.25 seconds. How long would it take a 64 gram sample to decay into a 32 gram sample?
answer:✅2.25 seconds
*There are 24 grams of Rhodium-101 in a sample. Rhodium-101 has a half life of 3.3 years. How many grams of Rhodium-101 will remain after 6.6 years?
*Sodium-24 has a half life of 15 hours. What fraction of the sample is still Sodium-24 after 45 hours?
*Mercury-210 has a half life of 10 minutes. How many grams of a 200 gram sample remain after 40 minutes?
answer choices: 1/8, 12.5 g, 6 g,
21.Aiden climbs an apple tree and drops apples down to his classmate Aidan who is standing on the ground. The apples have an average mass of 0.080 kg. Which statement is false?
23.A student is asked to determine whether a wave is sound or light by playing 20 questions with their partner.
Which question would not help them to determine whether the wave is light or sound?
A. Does the wave transfer energy or matter?
B. Does the wave vibrate air molecules in the same direction as the wave transfers energy?
C. Does the wave travel faster in gases, liquids, or solids?
Answers
Based on the law of conservation of mass, no loss in mass for group A occurs whole some loss in mass may occur for group B.
What is conservation of mass?Conservation of mass is the principle that total mass remains unchanged in an isolated system undergoing change.
The conservation of mass is derived from law of conservation of mass.
In the experiment involving burning of candles, A is a closed system while B is an open system.
Since A is a closed system, the law of conservation of mass is observed and no loss in mass occurs.
Since B is an open system, it could be difficult to account for all of the reactants and products since some products or reactants may be lost from the system.
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which term matches this definition? The substance doing the dissolving in a solution
Answers
Answer:
solute
Explanation:
2. Suppose the object Marcie found is a rock formed by volcanic processes. What type of rock would it be? A. igneous B. metamorphic C. mineral D. sedimentary
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Answer:
The answer would be A. igneous
Explanation:
which type of star is vega
Answers
Answer:
Vega's spectral class is A0V
Explanation:
What is the codon for AAT?; What is the codon code for DNA?; What is the mRNA codon for alanine?; What is the mRNA of AAA?
Answers
Asparagine is the codon for AAT .Asparagine is an α-amino acid that is used in the biosynthesis of proteins.It is a polar, aliphatic amino acid because it has a -amino group, -carboxylic acid group, and side chain carboxamide. In humans, it is not necessary, therefore the body may produce it on its own.
A codon is a DNA or RNA sequence of three nucleotides (a trinucleotide) that forms a unit of genomic information encoding a particular amino acid or signaling the termination of protein synthesis (stop signals). There are 64 different codons: 61 specify amino acids and 3 are used as stop signals.
For alanine, mRNA codons are GCU, GCC, GCG, and GCA.
The template strand of DNA has AAA sequence, which will be transcribed to mRNA as UUU.
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Fill in the blanks
Nebulae are____ where____ can form.
Dust and gas
Stars
Light
Gravity
Plants
SOMEONE HELP!
Answers
Nebulae are Dust and gas where Stars can form, hence option A, B.
How is nebula formed?Although there are less than ten atoms per cubic meter in intergalactic space, it is not completely vacuum. Nature, after all, detests emptiness! When a few atoms are close enough to one another to clump together, a nebula starts to form. Naturally, the gravitational influence of atoms increases with the number of clumps they form. Eventually, a sizable gaseous cloud forms in space as a result of them being able to drag even more particles toward them.
A nebula is primarily a cloud of gas and dust in space; when there are several, they are collectively referred to as nebulae. Some of the most beautiful celestial phenomena are nebulae, and many of them have been given names that refer to things we are familiar with, like the land.
Therefore, option A, B are correct.
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Hi can someone whos good with biology please help me with this im struggling with it
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Explanation:
For the Punnett square, for each genotype (Letters), you just find out how many of a certain combination in the boxes that there are .
(e.g, if there's one BBRR = 1/16, if there's 3 BbRrs = 3/16)
Do that for each Genotypic Ratio.
For the phenotypic ratio, you need to find out which genotype is dominant, and if the genotype combo will show up in a guinea pig physically.
For example, for the Black, Rough Phenotype, it would be the BBRR combo, since both are dominant and will be present in the guinea pig.
i hope this helped you !!!!!!!!!!!
A dihybrid cross is a breeding experiment that involves studying the inheritance patterns of two different traits simultaneously.
It examines the inheritance of two different genes located on different pairs of homologous chromosomes. This type of cross allows for the analysis of independent assortment and the determination of the phenotypic and genotypic ratios of offspring.
The genotypic and phenotypic ratios are:
Genotype ratio:
BBRR: 1/16
BBRr: 2/16
BBrr: 1/16
BbRR: 2/16
BbRr: 4/16
Bbrr: 2/16
bbRR: 1/16
bbRr: 2/16
bbrr: 1/16
Phenotype ratio:
Black, rough: 9/16
Black, smooth: 3/16
White, rough: 3/16
White, smooth: 1/16
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Which statement describes characteristics of planarians?
A. They live in oceans, are parasites, and reproduce only sexually.
B. They live in fresh water, are parasites, and reproduce only asexually.
C. They live in oceans, are free living, and reproduce sexually and asexually.
D. They live in fresh water, are free living, and reproduce sexually and asexually.
Answers
Answer:
D. They live in freshwater, are free-living and reproduce sexually and asexually.
Explanation:
Most planarians are found in freshwater. Since they reproduce through fission, they reproduce asexually. However, since they are heteromorphic, they also reproduce sexually.
Answer:
I believe that the answer above is correct, and that D. “They live in fresh water, are free living, and reproduce sexually and asexually” is correct.
Explanation:
Some types of planarians live in water, and some live on land. Most planarians live in fresh water and sometimes stay in a big group. Some types are parasites, that means they live off of other living animals.
Help me please Yall I swear this is so anoying
Answers
Explanation:
Photosynthesis is performed by all plants,algae and even some microorganisms. Which plants use sunlight,water and carbon dioxide to create oxygen and energy in the form of sugar/ aka glucose/food for plants
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