Sponges, cnidarians, and flatworms are all aquatic invertebrates that lack specialized respiratory systems. The reason why they do not require specialized gas exchange surfaces is because they have (B) a nearly all of their cells are in direct contact with the environment.
Sponges, cnidarians, and flatworms are aquatic invertebrates that lack specialized respiratory systems. The reason they do not require specialized gas exchange surfaces is because almost all of their cells are in direct contact with the environment.
Cnidarians are simple animals that possess a sac-like structure with a single opening, where they consume food and excrete waste. They have no specialized respiratory or circulatory system and exchange gas by simple diffusion through their body wall.
Sponges, on the other hand, have numerous pores and canals that allow water to circulate through their body, filtering out food and oxygen for use by their cells. Like cnidarians, they also have no specialized respiratory or circulatory system. Flatworms are more advanced than sponges or cnidarians, but still lack specialized respiratory systems.
Their flat body shape allows for a greater surface area to volume ratio, meaning that a large proportion of their body is in contact with the environment, allowing for sufficient gas exchange by diffusion through their body wall. Some flatworms also possess simple excretory systems that help to regulate water balance and eliminate waste products.
In summary, sponges, cnidarians, and flatworms do not require specialized respiratory systems because they are aquatic invertebrates that have a large surface area to volume ratio, which allows for a high rate of gas exchange by simple diffusion through their body wall.
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1. Which of the following is an example of sensitization:
You blink each time your eye doctor gives you a puff of air in your eyes.
A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.
You no longer feel your shirt touching your skin.
You're walking on the sidewalk and a bicyclist almost hits you, so you jump out of the way.
The example of sensitization from the given alternatives is that 'A dog was hit by his previous owner, and now the dog cowers each time his new owner reaches out to pet him.'
Sensitization refers to the process in which an organism becomes more sensitive to stimuli, both good and bad. It happens when the body's nervous system becomes oversensitized to a particular stimulus that it begins to respond even to weaker or non-threatening stimuli.
The example given in the first option refers to a simple reflex action that occurs in response to the puff of air that is blown into the eyes during the eye examination. The third option is about sensory adaptation, which occurs when sensory receptors are exposed to stimuli for an extended period, resulting in a reduction in sensitivity. The fourth option refers to the fight or flight response that occurs as a result of a threatening stimulus, in which an individual's body prepares to confront or flee from danger.
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which is the best statement?
Answer:
im pretty sure its 4
Explanation:
giving brainliest
Which part of the body connects the bones together and prevents them from rubbing against each other?
Blood
Cartilage
Muscle
Spinal cord
Answer:
b! (cartaladge)
Explanation:
Answer: Cartilage
Explanation: It’s a soft pad in between your joints that prevents them from rubbing together. Usually it is warn out in your years of life.
Directions:. Use your responses to answer the following question.
14. How do the methods of speeding the rate of solution for dissolving a solid in a liquid
compare to the methods of speeding the rate of solution when dissolving a gas in a liquid?
When comparing the methods of speeding the rate of solution for dissolving a solid in a liquid to the methods of speeding the rate of the solution when dissolving gas in a liquid, there are some notable differences:
Surface area: In dissolving a solid, increasing the surface area of the solid can significantly speed up the rate of solution. However, in the case of a gas, since gases are already in a dispersed form, increasing the surface area is not applicable.
Pressure: Increasing the pressure generally does not have a significant impact on the rate of the solution when dissolving a solid in a liquid. However, when dissolving a gas in a liquid, increasing the pressure can significantly enhance the solubility of the gas.
Temperature: Increasing the temperature generally increases the rate of solution for both solids and gases in a liquid.
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the reflex that prevents a muscle from exerting too much tension is the ________ reflex.
The reflex that prevents a muscle from exerting too much tension is the Golgi tendon reflex.
The Golgi tendon reflex is a mechanical reflex that prevents a muscle from contracting too much. This helps protect the muscle from injury or injury. The reflex occurs when a muscle contracts too much and sends a signal to the central nervous system.
The central nervous system then sends a feedback signal to the muscle, causing the muscle to relax. This helps maintain proper muscle tone and prevent injury. The Golgi tendon reflex is one of the main reflexes that help maintain muscle balance and postural stability.
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what is the difference between autosome and x-linked ?
Autosomal recessive disorders are typically not seen in every generation of an affected family. X-linked dominant disorders are caused by mutations in genes on the X chromosome, one of the two sex chromosomes in each cell.
Allison wants to give pictures from the dance competition to her friends. Which resolution is most efficient for sending the files in the body of an email?
36 dpi
72 dpi
1,200 dpi
300 dpi
The resolution which is most efficient for sending theses files (pictures) through an email is: B. 72 dpi.
What is a resolution?A resolution can be defined as the number of pixels that are contained in an image (picture) or on a display monitor.
In Computer science, a resolution is typically expressed as a function of the number of pixels on both the horizontal axis and vertical axis.
This ultimately implies that, the resolution of an image (picture) determines its quality and sharpness.
In conclusion, Allison should send the pictures from the dance competition to her friends by using a resolution of 72 dpi.
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Read each of the answers below carefully: Which statement best describes the cell cycle? a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase. b. Cells grow and develop during the mitotic phase. Cells reproduce during interphase. c. The nucleus of the cell divides during interphase. The cytoplasm of a cell divides during the mitotic phase. d. The nucleus of the cell divides during the mitotic phase. The cytoplasm of a cell divides during interphase.
Answer:
a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
Explanation:
Cell cycle refers to the series of processes that leads to the growth/development and division of a cell. The cell cycle uses MITOSIS for cell growth. Mitosis comprises of two distinct stages namely: INTERPHASE AND MITOTIC PHASE. The interphase is referred to as the resting phase of the cell in which the cell grows and develops.
On the other hand, MITOTIC PHASE is the stage where the actual division of the nucleus (karyokinesis) and cytoplasm (cytokinesis) generally called CELL DIVISION occurs. Therefore, the cell reproduces i.e. one cell forming two, in the mitotic phase.
The statement best describes the cell cycle - a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
Cell cyclethe series of processes that result in the growth and development and division of a cell.The cell cycle uses MITOSIS for cell growth. there are two distinct stages namely:INTERPHASE is referred to as the resting phase of the cell in which the cell grows and develops.MITOTIC PHASEis the stage where the actual division of the nucleus (karyokinesis)and division of cytoplasm (cytokinesis)Thus, The statement best describes the cell cycle - a. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
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sandra has taken up bodybuilding and is starting to become more interested in a diet to improve athletic performance. she read an article in a bodybuilding magazine that said she should dramatically increase her dietary protein intake. what happens to protein when it is consumed in excess of the body's needs? multiple choice excess amino acids are excreted in the urine. the extra amino acids increase muscle protein synthesis. excess amino acids are used to meet energy needs or converted to and stored as fat. all of the above are potential results of excessive dietary protein intake.
When protein is taken in excess of the body's demands, extra amino acids can be utilised to meet energy needs or transformed to and stored as fat.
What portion of the amino acid will transform into urea when protein intake is excessive?When you consume proteins, your body turns them into amino acids.. Amino acids that are left over form ammonia, which the body must expel. Many molecules (enzymes) produced by the liver convert ammonia into urea,
What occurs when the body has too much protein and how does the body react when there is not enough protein?While an excess of amino acids is often eliminated, an excess of protein is typically retained as fat. Over time, this may result in weight increase, particularly.
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Which of the following is responsible for the cohesive property of water?
Hydrogen bonds between water molecules and other types of molecules
Hydrogen bonds between the oxygen atom of one water molecule and the hydrogen atoms of another water molecule
Hydrogen bonds between two oxygen atoms of adjacent water molecules
Covalent bonds between the hydrogen atoms of one water and the oxygen atoms of another water molecule.
Answer:
Cohesion: Hydrogen Bonds Make Water Sticky
Hydrogen bonds are attractions of electrostatic force caused by the difference in charge between slightly positive hydrogen ions and other, slightly negative ions.
Which choice correctly orders the three pools of synaptic vesicles, from MOST common to LEAST common?A. release-ready, recycling, reserveB. the blood-brain barrier.C. release-ready, recycling pool, and reserve pool vesicles. D. Sensory neuron- interneuron-motor neuron- muscle
The correct option is C. The correctly orders the three pools of synaptic vesicles, from most common to least common are release-ready, recycling pool, and reserve pool vesicles.
Synaptic vesicles are responsible for storing and releasing neurotransmitters in the synaptic cleft. There are three pools of synaptic vesicles: the release-ready pool, recycling pool, and reserve pool. The release-ready pool contains vesicles that are primed and ready to release their contents upon stimulation.
The recycling pool contains vesicles that have already released their contents and are being recycled for future use. The reserve pool contains vesicles that are not yet ready for release and must undergo a process of maturation before being incorporated into the release-ready pool.
The correct option is C. Therefore, the correct order of these pools from most common to least common is release-ready, recycling, reserve.
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The element carbon has three natural isotopes: C-12, C-13, and C-14.
Use the periodic table to find the number of protons in a carbon atom.
Then make a drawing to show the nuclei of the three carbon isotopes.
Your drawing should convey the number of protons and neutrons in each of the three different nuclei.
Answer: See Below
Explanation:
1. There are 6 protons in a carbon atom (The # of protons is the same as the atomic number).
2. Attached below. Red circles are protons blue are neutrons.
Understand that the number following the C (12,13,14)
refers to the total number of protons and neutrons in the atom. Proton number does not change only neutrons can.
Explain Genotype Vs phenotype with examples
Answer:
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example, having blue eyes (an autosomal recessive trait) is a phenotype; lacking the gene for brown eyes is a genotype.
Explanation:
Answer:
The whole answers are on the picture.
Explanation:
I hope it helps to you a lot and if you are satisfied with my answer please mark it as brainliest (if my answer is right)... Thank You!
To form amino acids from the main chemicals in Twinkies, what needs to happen? They need to be broken apart into individual atoms and rebuilt through RNA translation. They need to be broken apart into individual atoms and rebuilt through RNA translation. These compounds are already amino acids that need no further construction. These compounds are already amino acids that need no further construction. They can't be used to form amino acids, but are used in cellular respiration to create ATP. They can't be used to form amino acids, but are used in cellular respiration to create ATP. Bonds between their elements can be broken and reformed to construct amino acids. Bonds between their elements can be broken and reformed to construct amino acids.
Answer:
They need to be broken apart into individual atoms and rebuilt through RNA translation.
Explanation:
To form an amino acid the individual elements needs to be joined together to form a compound.
An amino acid is made up of nitrogenous bases they are joined together to form codon and are translated to amino acid
The process of translation in deoxyribonucleic (DNA) acid helps to translate the bases into an amino acid. This amino acids are said to be the buildings blocks of protein they perform specific function in the body system.
construct an argument how the digestive system depends on the cardiovascular system to function properly
Answer:
The main function of the cardiovascular system is therefore to maintain blood flow to all parts of the body, to allow it to survive. Veins deliver used blood from the body back to the heart. When your blood circulates through your digestive system, it picks up nutrients your body absorbed from your last meal. So it is a very critical part of the digestive system since the body can't absorb nutrients to survive
the histology of tissue how tissues are specialised and adapted to carry out a particular function. using your biological drawing and any other sources showing how tissues are adapted for particular functions, explain each of the following statements: The histology of compact hard bone shows adaptations that are related to the function of: •bone for storage of calcium• the skeleton for support of the body
Answer:
•bone for storage of calcium: the body only gets the calcium it needs through the food you eat, or from supplements. Bones store calcium, a mineral that can be released into the bloodstream when calcium is needed elsewhere in the body.
The amounts of some vitamins and minerals we take in, especially vitamin D and calcium, directly affect the amount of calcium we store in our bones.
• the skeleton for support of the body: bones provide support for our bodies and help give them shape. Although they are very light, the bones are strong enough to support our full weight.
which of these explains why a drug that damages capsids can help in the treatment of a viral infection
Viruses are composed of genetic material surrounded by a capsid made of proteins. D. a drug that damages capsids can help in the treatment of a viral infection because capsids provide protection for viruses.
What is the viral structure?
The virus structure includes genetic material (DNA or RNA) inside a proteic protector layer known as the capsid.
The capsid structure might vary among viruses. It is composed of proteins that are codified by the viral genes in the viral genome.
Basically, the virus structure is always genetic material (DNI or RNA) surrounded or protected by proteins.
The correct option is D. Capsids provide protection for viruses.
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Complete question:
Why would a drug that damages capsids help treat a viral infection?
A. Capsids prevent the lytic cycle from beginning.
B. Transduction requires a capsid.
C. Viruses use capsids to increase genetic variation.
D. Capsids provide protection for viruses.
does anyone know the specializations of the dura mater?
RESPUESTA:La duramadre es la meninge exterior que protege al sistema nervioso central (encéfalo y médula espinal).
Es un cilindro hueco formado por una pared fibrosa y espesa, sólida y poco extensible. Se extiende hasta la 2ª o la 3ª vértebra sacra. Tanto la piamadre como la aracnoides reciben el nombre de leptomeninge.
La superficie interna es lisa y pulida y corresponde a la capa endóstica, mientras que la externa es regularmente redondeada y responde a las paredes óseas y ligamentosas del conducto vertebral, corresponde a la capa meninge [1](duramadre propiamente dicha que no continúa en el canal vertebral), de las que está separada por el espacio epidural.[2] Esta última, libre en su parte posterior, anteriormente se halla en contacto con el ligamento longitudinal posterior. En sentido lateral, se prolonga alrededor de cada nervio espinal, al que acompaña adelgazándose cada vez más por fuera del foramen intervertebral.
El extremo superior continúa sin límites netos con la duramadre craneal. Por su superficie externa, se adhiere al foramen magno y al atlas. El extremo inferior constituye el fondo de saco dural, que se detiene a nivel de S2-S3. Contiene a la cola de caballo y al filum terminale. Este último en la parte más inferior del saco dural, perfora a la duramadre, que se aplica contra él envainándolo. Desciende hasta la primera vértebra coccígea. La duramadre se adhiere a la cara anterior del conducto sacro.
huntington's disease is an autosomal dominant trait. given the pedigree below, if individual iv-2 has three children with a normal man, what is probability that exactly two of the three children would have the disorder?
There is a 50% probability that any kid born naturally to parents who have the Huntington's gene will also have the disease. It may be incredibly unsettling to live with the awareness that you are in danger.
How are individuals managing the sickness of Huntington's?Huntington's disease has no known treatment and there is no way to prevent it from becoming worse. However, some of the issues it causes, such as those brought on by depression medications, mood swings, and involuntary movements, can be lessened with therapy and support. To assist in making daily duties simpler, occupational therapy.
A person just requires one copy of the unusual gene to acquire Huntington's disease because it is an autosomal dominant illness. A individual inherits two copies of each gene, with the exception of chromosomal genes.
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The line goes through (-2,3) and (1,-3) find the slope?
Answer:
\( \boxed{ \boxed{ \bold {\blue{ - 2}}}}\)Explanation:
Let the points be A and B
A ( -2 , 3 ) ⇒( x₁ , y₁ )
B ( 1 , -3 )⇒( x₂ , y₂ )
Now, let's find the slope:
Slope = \( \sf{\frac{y2 - y1}{x2 - x1} }\)
plug the values
⇒\( \sf{ \frac{ - 3 - 3}{1 - ( - 2)} }\)
When there is a ( - ) in front of an expression in parentheses , change the sign of each term in the expression
⇒\( \sf{ \frac{ - 3 - 3}{1 + 2} }\)
Calculate
⇒\( \sf{ \frac{ - 6}{3} }\)
⇒\( \sf{ - 2}\)
Hope I helped!
Best regards!!
Answer:
m = -2
Explanation:
Step 1: Use slope formula to find slope
\(m=\frac{y2-y1}{x2-x1} =\frac{-3-3}{1-(-2)}= \frac{-6}{3} =-2\)
Therefore the slope of the line is -2
Therefore the slope is -2
Which of the following is NOT correct about all animals: Group of answer choices All animals have true tissues. All animals are eukaryotes. All animals are heterotrophic. All animals are multicellular.
In conclusion, while the statements that all animals are eukaryotes, heterotrophic, and multicellular are correct, the statement that all animals have true tissues is not accurate because sponges, a group of animals, do not possess true tissues. The statement that is NOT correct about all animals is "All animals have true tissues."
While it is true that most animals have true tissues, there is one group of animals called sponges that do not have true tissues. Sponges are multicellular organisms but lack specialized tissues. They have different cell types, but these cells are not organized into tissues like in other animals.
On the other hand, the other statements are correct about all animals:
- All animals are eukaryotes: Animals, including humans, are made up of cells that have a nucleus and other membrane-bound organelles. These characteristics are defining features of eukaryotic cells.
- All animals are heterotrophic: Animals cannot produce their own food through photosynthesis, unlike plants. Instead, they obtain energy by consuming other organisms or organic matter. They rely on external sources for their nutrition.
- All animals are multicellular: Animals are composed of multiple cells that work together to perform various functions. This multicellular organization allows animals to have complex body structures and perform specialized tasks.
In conclusion, while the statements that all animals are eukaryotes, heterotrophic, and multicellular are correct, the statement that all animals have true tissues is not accurate because sponges, a group of animals, do not possess true tissues.
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which of the following aid an example of a trade-off?
A) scientific information
B) scientific information put into policy
C) all the benefits that come from scientific endeavors
B) something sacrificed in order to gain something else
Answer:
c_all the benefits that comes from scientific endeavors
why inter-sectoral cooperation is important in tackling environmental problems?
Answer:
it is important because they have the greatest role in tackling environment
Help in this two questions
Answer:
i dont know what it is i need points
cell division in both bacterial and eukaryotic cells involves the replication and segregation of information and the division of contents within the cell a called?
In both bacterial and eukaryotic cells, cell division entails the replication and segregation of information as well as the division of the contents of the cell, known as the genetic process.
Binary fission is a kind of cell division that occurs in prokaryotic cells, which include bacteria. Chromosome replication, segregation of the copied DNA, and cytoplasmic division of the parent cell are all components of this process. Genetically identical cells are produced by cell division in both bacterial and eukaryotic cells.
The following things happen in the following order when bacterial chromosomes segregate during binary division: 1) At the source of replication, replication starts. Virtually every cell has a life cycle that includes cell division. One cell splits into two new cells through the process of cell division.
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Geese fly in a v-like formation when migrating. Which statement is evidence that supports advantages of this group behavior? (4 points)
A) Birds can work together to find food and shelter.
B) Birds conserve energy and reduce wind resistance.
C) Birds need to move faster to avoid being seen by predators.
D) Birds can compete for mates when they fly together.
Answer:
B
Have a nice day :D
Birds conserve energy and reduce wind resistance when they fly in V-like formation.
Why Geese fly in a V-like formation?Flying in a v-like formation allows geese to conserve energy and reduce wind resistance as they migrate. The lead goose breaks the wind for the rest of the group, which allows the other geese to fly more efficiently and use less energy. This group behavior helps the geese to cover long distances during migration, as they are able to fly for longer periods of time without tiring.
The other options do not provide evidence of advantages of this group behavior. Option A) may be true, but it is not specific to flying in a v-like formation. Option C) is not necessarily related to group behavior, as geese may need to move faster for other reasons. Option D) is not relevant to the topic of migration.
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how does the body maintain a constant partial pressure of oxygen in the arteries even as exercise intensity increases?
During exercise, the body needs more oxygen to meet the increased demand of the muscles.
To maintain a constant partial pressure of oxygen in the arteries, the body employs a few mechanisms:
1. Increased breathing rate: During exercise, the respiratory rate and depth of breathing increase. This allows more oxygen to be taken in and delivered to the lungs for oxygenation.
2. Increased heart rate: The heart pumps blood faster during exercise, which means that oxygen-rich blood is delivered to the tissues more quickly.
3. Vasodilation: The arteries supplying the muscles dilate during exercise. This widening of the blood vessels allows for increased blood flow, delivering more oxygen to the muscles.
4. Red blood cell production: With regular exercise, the body adapts by producing more red blood cells. Red blood cells carry oxygen, so an increase in their numbers enhances the oxygen-carrying capacity of the blood.
By combining these mechanisms, the body ensures that a constant partial pressure of oxygen is maintained in the arteries, even as exercise intensity increases. These adaptations support the increased oxygen demand of the muscles and promote optimal functioning during physical activity.
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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
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Describe the relationship between a monomer and a polymer.
What is the differences between gmo and transgenic cell?
Answer:
Differences between GMO and the Transgenic cell is given below:-
Explanation:
Genetically modified organisms (GMOs):-
Genetically modified organisms ( GMOs) are those species that used genetic engineering techniques to change their genomes. We have novel gene configurations which do not occur throughout the species' genetic variability. This may require the addition of genes or the silencing of the. GMO genes.Transgenic cell:-
Transgenic organisms represent a particular example of GMOs. They are when genome modification includes the genetic material from another species. Like GloFish, marine anemones have genes inserted in them and are thus called transgenic.How can ecosystem-based management help to advance sustainable
natural resources use in Guyana? Develop a plan using this concept
for the conservation of natural resources in Guyana
Ecosystem-based management is an approach that takes into consideration the entire ecosystem and its interconnected components when making decisions about natural resource use. It can help advance sustainable natural resources use in Guyana by promoting a holistic and integrated approach to conservation and management.
To develop a plan for the conservation of natural resources in Guyana using ecosystem-based management, the following steps can be taken:
1. Identify and understand the ecosystems: Conduct comprehensive assessments to identify and understand the various ecosystems present in Guyana, such as forests, wetlands, rivers, and coastal areas. This will provide insights into the biodiversity, ecological processes, and services these ecosystems offer.
2. Assess the state of the resources: Evaluate the current status and trends of natural resources in Guyana, including flora, fauna, water bodies, and minerals. This assessment will help identify vulnerable or endangered species, areas of high biodiversity, and potential threats.
3. Establish conservation goals and objectives: Define specific conservation goals and objectives based on the assessments conducted. These goals should consider the need to protect biodiversity, maintain ecosystem services, and support sustainable livelihoods for local communities.
4. Engage stakeholders: Involve relevant stakeholders, including government agencies, local communities, indigenous groups, NGOs, and scientific experts. Encourage their active participation in decision-making processes to ensure diverse perspectives are considered.
5. Develop management strategies: Based on the conservation goals and stakeholder input, develop management strategies that integrate the principles of ecosystem-based management. These strategies should focus on protecting key habitats, managing land and water resources sustainably, and minimizing impacts from activities such as mining, logging, and agriculture.
6. Implement and monitor: Put the management strategies into action, ensuring proper enforcement of regulations and policies. Regularly monitor and evaluate the effectiveness of the implemented strategies to identify any necessary adjustments or improvements.
7. Promote education and awareness: Raise awareness among the public and stakeholders about the importance of ecosystem-based management and sustainable natural resource use. Promote education and capacity-building initiatives to empower local communities to actively participate in conservation efforts.
By adopting ecosystem-based management, Guyana can enhance the sustainable use of its natural resources while safeguarding its unique ecosystems and supporting the well-being of its people.
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