What is true about an atom

Answer: Determining a substance's physical or chemical identity. What are the two main requirements for identification? The adoption of testing procedures that give characteristic results for specific standard materials and the number and type of tests needed to identify a substance to exclude all other substances.

Extracellular polymeric substances help protect biofilms from issues such as drying out and predators. Option A

Biofilms are complex communities of microorganisms that adhere to surfaces and form a protective matrix. They can be found in various natural and artificial environments, such as riverbeds, medical devices, and plumbing systems. Biofilms provide advantages to the microorganisms within them, including protection from environmental stresses and predators.

One of the key components that helps protect biofilms is extracellular polymeric substances (EPS). EPS are complex mixtures of polysaccharides, proteins, and DNA that are secreted by microorganisms within the biofilm. These substances form a matrix that encases the cells, providing structural support and protecting the community.

EPS help biofilms resist drying out by retaining water and preventing desiccation. The polysaccharides in EPS can absorb and retain moisture, creating a hydrated environment within the biofilm even in dry conditions. This is crucial for the survival of the microorganisms within the biofilm.

Additionally, EPS serve as a barrier against predators. The matrix formed by EPS can make it difficult for predators, such as protozoa or grazing organisms, to access and consume the microorganisms within the biofilm. It acts as a physical defense mechanism, limiting the exposure of the microorganisms to predation.

While quorum sensing, becoming sessile (immobile), and autoinducers are all important mechanisms and processes associated with biofilms, they do not directly address the protection of biofilms from drying out and predators. So Option A is correct.

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The remora fish, which adheres to a shark and feeds on the leftovers of the Parasitism, mutualism, and commensalism are all types of symbiosis. The correct option is C.

Thus, a biological relationship between two or more distinct species is called symbiosis. Three different kinds of symbiotic interactions include parasitism, mutualism, and commensalism. One species gains from parasitism while the other suffers. The parasite can harm or even kill its host while feeding on it. In a mutualistic connection, both species gain from the interaction.

For instance, bees pollinate flowers while the blooms feed the bees nectar. One species gains by commensalism, whereas the other is neither aided nor hurt, which is a type of symbiosis.

Thus, the ideal selection is option C.

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A paramecium is considered a living organism because it exhibits characteristics associated with living organisms, such as movement and response to stimuli.

The ability of a paramecium to move forward at rates up to 2 millimeters per second demonstrates its capability for self-propelled motion, a defining feature of living organisms. Additionally, the paramecium's ability to avoid objects by reversing its swimming direction showcases its responsiveness to external stimuli. This behavior indicates a level of sensory perception and decision-making, further supporting its classification as a living organism. While swimming backward may not be as smooth as swimming forward, the fact that a paramecium can change its direction of movement demonstrates adaptability and a degree of control over its actions. Overall, these characteristics collectively indicate the living nature of a paramecium.

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Answer:

Boreal forest is among the largest terrestrial biomes on earth in which minerals in the soil most rapidly depleted.

The great white shark or Carcharodon carcharias is an animal, which means it has a cell membrane made of the following phospholipids:

• phosphatidylcholine (PtdCho)

• phosphatidylethanolamine (PtdEtn)

• phosphatidylinositol (PtdIns)

• phosphatidylserine (PtdSer).

Phospholipids are amphipathic molecules, which means they have a hydrophilic head and a hydrophobic tail, which organize themselves into a bilayer that makes the cell membrane and separates the outside of the cell from the inside of the cell. This membrane is selectively permeable and it doesn't let ions and polar molecules pass through.

In a white shark cell, it will be also cholesterol present in the membrane, which wouldn't be present in the case of a plant. Cholesterol helps the membrane to have rigidity and strength because it fills the spaces left between the tails of the phospholipids.

We can have the ion channels as an example of a transmembrane protein, they exist to let ions go in and out of the cell given that they can't diffuse across the cell membrane.

1.Ice melting is a physical change

2.Eggs cooking is a chemical change

3.Salt dissolving is a physical change

4.Wood burning is a chemical change

5. Fireworks exploding is a chemical change

A substance can change physically even when no new substance is created as a result of the change. It simply modifies the substance's outward attributes, such as its shape, size, texture, or phase (such as solid, liquid, or gas).

When a compound undergoes a chemical change, a new substance or substances with new chemical properties are created. Chemical bonds are broken and formed as a result of this process, which transforms one or more chemicals into one or more new substances. Chemical changes can release or absorb energy (heat, light, or sound), and they are frequently irreversible.

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Answer:

mantle i believe the answer should be mantle

Answer:

Mantle~

Explanation:

~~

Answer:

provides your brain with a constant supply of oxygen rich blood

Yes, the distribution of chlorophyll, stomata, mesophyll cells, and vascular bundles supports photosynthesis.

Let us discuss each separately.

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Answer:

The planet closest to the sun is Mercury, at just 58 million km (36 million miles) or 0.39 Astronomical Unit (AU) out.

Answer:

Causes of Urban Sprawl:

Population Growth: Rapid population growth is a significant cause of urban sprawl. As cities experience an increase in population, there is a greater demand for housing and infrastructure, leading to the expansion of urban areas into previously rural or undeveloped lands.

Transportation Infrastructure: The development of transportation infrastructure, such as highways and roads, can contribute to urban sprawl. Improved accessibility and connectivity provided by these infrastructures often lead to the outward expansion of cities as people choose to live farther away from city centers.

Human Health Effects Associated with Urban Sprawl:

Sedentary Lifestyle and Obesity: Urban sprawl often leads to increased reliance on private vehicles and longer commuting distances. This sedentary lifestyle, coupled with the lack of pedestrian-friendly infrastructure, can contribute to a decrease in physical activity and an increased risk of obesity among residents.

Air Pollution and Respiratory Issues: Urban sprawl is associated with increased vehicular emissions, leading to poor air quality. Exposure to high levels of air pollution can cause respiratory problems, such as asthma and other respiratory diseases, impacting the health of individuals residing in these areas.

Relationship between Population Density and Petroleum Use:

The graph illustrates that there is an inverse relationship between population density and petroleum use. As population density increases, per capita petroleum use tends to decrease. This relationship suggests that higher population density is associated with more efficient use of petroleum resources, potentially due to factors such as improved public transportation systems, shorter commuting distances, and increased availability of alternative modes of transportation. The graph indicates that cities with higher population density tend to have lower per capita petroleum use, while cities with lower population density exhibit higher per capita petroleum use.

Steps to Encourage Smart Growth and Limit Urban Sprawl:

Mixed-Use Development: Municipalities can encourage mixed-use development, which involves integrating residential, commercial, and recreational spaces within the same area. This approach reduces the need for long commutes and promotes walkability, thereby limiting urban sprawl.

Transit-Oriented Development: Promoting transit-oriented development focuses on creating compact, vibrant communities around public transportation hubs. By providing easy access to public transit options, municipalities can encourage residents to rely less on private vehicles, reducing congestion and the need for expansive road networks.

Methods to Reduce Harmful Effects on Wildlife Populations:

Wildlife Corridors: Establishing wildlife corridors or green belts can mitigate the negative impacts of highways and urban sprawl on wildlife populations. These corridors provide protected pathways for wildlife to move between fragmented habitats, reducing habitat fragmentation and enhancing biodiversity conservation.

Eco-Friendly Infrastructure Design: Implementing wildlife-friendly infrastructure design features such as wildlife crossings, underpasses, and fencing can help prevent wildlife-vehicle collisions. These measures allow animals to safely traverse across highways and urban areas, minimizing the detrimental effects on wildlife populations.

Increasing Food Production within Urban Areas:

One practical way to increase food production within urban areas is through the implementation of urban agriculture initiatives. This can involve utilizing rooftops, balconies, community gardens, and vacant lots to cultivate crops, raise livestock, or engage in aquaculture. Urban agriculture not only increases local food production but also promotes food security, community engagement, and environmental sustainability by reducing the carbon footprint associated with long-distance food transportation.

By adopting smart growth strategies, addressing the impacts of urban sprawl on wildlife and implementing urban agriculture initiatives, municipalities can actively promote sustainable and resilient urban development.

Mitochondrial diseases are caused by mutations in the mitochondrial DNA, which is located in the mitochondria. These mutations are usually inherited from the mother, as the mitochondrial DNA is passed down from the mother to her children.

Mitochondria are organelles found in the cells of all eukaryotic organisms, which are responsible for generating most of the cell’s supply of chemical energy. They are often referred to as the “powerhouses” of the cell. Mitochondria are essential for life and are involved in a variety of cellular processes, such as metabolism, cell growth, and cell death. They contain their own DNA and can replicate independently from the cell. Mitochondria are also involved in several metabolic pathways, such as the tricarboxylic acid cycle, the beta-oxidation of fatty acids, and the synthesis of amino acids. Mitochondria are essential for life and have been linked to a variety of degenerative diseases, such as Parkinson's disease, Alzheimer's disease, and diabetes.

It is very rare for a mitochondrial disease to be inherited from the father or contracted from a viral, bacterial, or parasitic infection.

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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

Disinfectants 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

Compound leaves and leaves with lobed margins can be suited to windy environments because they decrease air resistance, avoiding the loss of water by evaporation.

A plant adaptation is any type of trait that confers an evolutionary advantage in a given environment.

Plant adaptations include, for example, the presence of fewer stomata in leaves in plants living in arid conditions.

In conclusion, compound leaves and leaves with lobed margins can be suited to windy environments because they decrease air resistance, avoiding the loss of water by evaporation.

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Answer:

If humans and animals could do photosynthesis, there would be several potential benefits and drawbacks:

Benefits:

Energy production: Photosynthesis is the process by which plants and some bacteria convert light energy into chemical energy, which is used to fuel metabolic processes. If humans and animals could do photosynthesis, they could potentially produce their own energy from sunlight, reducing their reliance on other energy sources.

Reduced food requirements: Photosynthesis could potentially reduce the need for food in humans and animals, as they could use sunlight to produce some nutrients and energy. This could be particularly beneficial when food is scarce, such as during famine or in space travel.

Environmental sustainability: Photosynthesis is a crucial process in the carbon cycle, converting carbon dioxide into organic compounds. If humans and animals could do photosynthesis, they could potentially reduce their carbon footprint and contribute to environmental sustainability.

Drawbacks:

Limited energy production: While photosynthesis is an efficient process for plants, it may not be as efficient in humans and animals. It is possible that the energy produced through photosynthesis may not be sufficient to meet the energy requirements of humans and animals, particularly if they are engaging in high-energy activities.

Limited nutrient production: Photosynthesis produces mainly glucose and other simple sugars, which may not be sufficient to meet all the nutritional needs of humans and animals. This could lead to deficiencies in certain nutrients, such as protein and essential amino acids.

Evolutionary limitations: Humans and animals have evolved to obtain energy and nutrients from food, and it is unclear whether the ability to do photosynthesis could be developed through evolution. It is also possible that the ability to do photosynthesis could have negative impacts on other aspects of human and animal biology, such as the immune system or reproductive health.

In summary, the ability for humans and animals to do photosynthesis could have some potential benefits, such as energy production, reduced food requirements, and environmental sustainability. Still, it may have some drawbacks, such as limited energy and nutrient production and evolutionary limitations.

Explanation:

Ribosomal subunits are made by the nucleolus. The

Ribosome contains two different subunits, both of which are required for translation. The small subunit (“40S” in eukaryotes) decodes genetic messages, while the large subunit (“60S” in eukaryotes) catalyzes the formation of peptide bonds.

In eukaryotes, rRNA is assembled into four strands on the ribosome and into three strands in prokaryotes. Eukaryotic ribosomes are produced and assembled in the nucleolus. Ribosomal proteins enter the nucleolus and bind four rRNA strands to form the two ribosomal subunits (small and large) that make up the complete ribosome. The

Ribosomal units exit the nucleolus through the nuclear pore and enter the cytoplasm where they bind for protein synthesis. When no protein is produced, her two subunits of the ribosome separate.

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The nucleolus manufactures ribosomal subunits. The ribosome contains two different subunits, both of which are required for translation.

Both of the two distinct subunits found in ribosomes are necessary for translation. The big subunit (designated the 60S in eukaryotes) catalyzes the synthesis of peptide bonds, while the small subunit (designated 40S in eukaryotes) decodes genetic signals.

The ribosome assembles rRNA into three strands in prokaryotes and four strands in eukaryotes. The nucleolus is where eukaryotic ribosomes are made and put together. The two ribosomal subunits (small and big) that make up the entire ribosome are formed when ribosomal proteins bind four strands of rRNA inside the nucleolus. The

Therefore, the ribosomal subunits are produced in the nucleolus. Both of the two different subunits found in the ribosome are necessary for translation.

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Answer:

Explanation: The two finches eat different kinds of food. The woodpecker finch eats insects and the large ground finch eats seeds. They do not compete for the same resources.

Due to differences in their eating habits and resources, large ground finch and the woodpecker finch can live successfully on the same island.

The criteria for coexistence are as follows:

The required food for woodpecker finch is small insects and plant woods, while the required food for a large ground finch is plant seeds which usually migrates at the time of seed dispersal.

Both these species do not compete for the same resources, and therefore, both of them are successfully living on the same island.

According to the law of competitive exclusion, no two species can coexist in the same niche for a long time. If they do so, there will be competition for similar demands of food and space.

Therefore, due to differences in their eating habits and resources, large ground finch and the woodpecker finch can live successfully on the same island.

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Stevens says that the intensity of a feeling is: decreased as the physical stimulus became more intense.

Option B is correct.

The force per unit charge that is applied to a positive test charge that is at rest at that location is represented by the electric field, which is described mathematically as a vector field that can be connected to any point in space. An electric field can be created by either the electric charge or time-varying magnetic fields.

The intensity (I) of a wave is determined by dividing the surface area over which the energy is dispersed by its rate of energy transfer. To put it another way, intensity refers to the rate of energy flow per unit area. The amount per unit region is estimated by force. Intensity is typically used to describe the size of waves per unit area. Another way to think about a wave's strength is its power per unit of area over time.

Therefore, Stevens asserts that the intensity of a sensation is as follows: diminished as the force of the actual improvement increments.

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The answer is Dermal tissue

*Dermal tissue helps in covering and protecting the plants as well as controlling their gas exchange and water absorption in roots. It is covered by a waxy cuticle that helps in preventing the plants from water loss.

*Apical meristem is responsible for the extension of the shoots and roots.

*Endodermis is responsible for regulating the movements of water, ions, and hormones into and out of the vascular system.

*Nodes are the site where the buds, leaves, and branching twigs originate. .

Answer:

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

Answer:

ice, rain, snow, clouds, water vapor

Silt suspended in the water surrounding a coral reef can cause coral bleaching and Mercury in water can lead to brain and nerve damage in fish and humans.

The silt in the water can come from a variety of sources such as construction activities, agricultural run-off, or erosion caused by natural events like storms. The loss of coral reefs can have a significant impact on humans, particularly on the fishing and tourism industries.

Mercury in the water of a large lake that is popular for fishing, Mercury can enter water bodies through industrial waste, mining activities, or atmospheric deposition. In this case, it could be due to the discharge of mercury-containing waste from industries, or from coal-fired power plants in the region, Fish living in the lake can absorb the mercury from the water which can damage their brains.

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The complete question is:

Research each type of water pollution listed below. Then describe its origin, its effect on one organism in the polluted water, and its effect on humans silt suspended in the water surrounding a coral reef near the coast of a small island community in the Caribbean SeaOrigin: Effect on one organism: Effect on humans: mercury in the water of a large lake that is popular for fishing Origin: Effect on one organism: Effect on humans:

Answer:

Cloning removes the nucleus from an egg cell and replace it with the nucleus from another organism.

More information :

Answer:

The correct answer would be - high intercellular ratio the ratio of NAD/NADH and low intercellular ratio the ratio of [NADP+]/[NADPH]

Explanation:

The role of NAD/NADH in dehydrogenation reactions and NADPH/NADP  in reductions explains that to promote or increase the oxidation of substrates the ration of NAD+/NADH should be high:

malate + NAD+ <===-> OAA +NADH + H+.

As NADPH and NADP+ generally help to increase the reduction of substrates, so we expect the ratio of [NADP+]/[NADPH] to low.

  Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example, a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. Stars begin their lives as clouds of dust and gas called nebulae. The gravity of a passing star or the shock wave from a nearby supernova may cause the nebula to contract. Matter in the gas cloud will begin to coalesce into a dense region called a protostar.

The force or speed of a machine is multiplied by its mechanical advantage. It is a figure (without units) that indicates how many times the apparatus multiplies a force (or speed). I. M. A. An ideal machine's mechanical advantage is the optimal mechanical advantage. Thus option A is correct.

The ratio of load to effort is referred to as a machine's mechanical advantage. The efficiency of a machine is due to its mechanical advantage. Effort/Load = Mechanical Advantage. The mechanical advantage M A is equal to F 0 F I where F 0 is the output force and F I is the input force.

Therefore, multiplies the resistance force.

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Answer:

second option

Explanation:

brainly keeps marking my explanation as inappropriate?; had to delete it entirely