Why is light emitted by elements when they are heated?
Answers
Answer:
Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light.
Explanation:
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Related Questions
write 7 differences between cell and virus.
Answers
Hey there! Here are 7 differences between a cell and a virus:
A cell is a significant structural and functional unit of all living organisms. Instead, a virus is an infectious agent that is considered non-living. The cell is a living component, unlike a virus that is a parasite. Cells are present in a living form, on the other hand, the virus is present in both living and non-livingA virus doesn’t contain any kind of cytoplasm, cell wall, cell membrane, ribosome or mitochondrion, whereas a cell contains all of these (depending on what kind of cell it is). Many viruses do not even have a membrane, often formed of only a protein capsid containing the DNA or RNA based genome. Cells can exist independently like bacteria or can be as a part of larger organisms like our own cells in the body. Viruses on the other hand are non-living infectious particles that are dependant on a living host to reproduce.Cells reproduce through binary fission and mitosis or meiosis. When a virus replicates, it uses lytic fission to do itVirus particles are slightly smaller than a cell.Hope this helped. Explanations and examples are included within the points.
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An individual who could trace a picture of a bicycle with his or her finger but could not recognize
Answers
An individual who could trace a picture of a bicycle with his or her finger but could not recognize the bicycle suffers from visual agnosia.
Visual agnosia is a disorder that affects an individual's ability to identify and recognize visual objects. Patients with this disorder can distinguish individual features of an object, but they are unable to perceive the object as a whole. People with this disorder can identify the color, texture, or shape of an object, but cannot recognize the object itself.
The severity of visual agnosia can vary from patient to patient, and it can affect their daily life in different ways. For example, a person with visual agnosia may have difficulty recognizing family members, reading, or driving. Some patients may only experience mild symptoms, while others may experience severe symptoms that affect their ability to function.
Visual agnosia is caused by damage to the visual cortex of the brain, which is responsible for processing visual information. Treatment for this disorder involves working with a speech and language therapist, an occupational therapist, and a neuropsychologist. The aim of treatment is to help the individual develop coping strategies to deal with the condition and to improve their overall quality of life.
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which type of tissue covers the body surface and lines organs and cavities?
Answers
Answer:
The type of tissue that covers the body surface, lines organs and cavities is called epithelial tissue or epithelium. It forms the covering on all internal and external surfaces of your body, lines body cavities and hollow organs, and is the major tissue in glands.
The nucleic acid _________ copies DNA so _________ can be made.
Answers
first blank: rna
second blank: protein
what happens to amino acids after digestion until they reach the liver.
Answers
Answer: Once passed through the membrane, the amino acids or peptides are released into the intestinal blood stream and are transported to the liver by the hepatic (liver) portal vein. This is known as the enterohepatic circulation.
What chemical bond most likely stores the mos energy?
Answers
The chemical bond that typically stores the most energy is the covalent bond, specifically the triple bond, as it involves the sharing of the highest number of electrons.
Covalent bonds involve the sharing of electrons between atoms, resulting in the formation of a stable molecule. Within covalent bonds, there are variations in bond strength, which correspond to the amount of energy required to break the bond.
Among covalent bonds, triple bonds are generally the strongest and store the most energy. Triple bonds involve the sharing of three pairs of electrons between two atoms. Examples include nitrogen gas (N2) and acetylene (C2H2), where the nitrogen and carbon atoms form triple bonds, respectively.
The strength of a covalent bond depends on several factors, including the number of shared electron pairs and the types of atoms involved. Bonds with higher bond orders (such as double or triple bonds) tend to be stronger and store more energy compared to single bonds.
It is important to note that other types of chemical bonds, such as ionic bonds and metallic bonds, also play significant roles in storing and releasing energy, but in general, covalent bonds, particularly triple bonds, are known for storing the most energy.
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A(n) ___________________ is a substance with specific chemical and physical properties.
Neutron
Proton
Electron
Element
Answers
Answer: Elements
Explanation: Elements are unique forms of matter with specific chemical and physical properties that cannot be broken down into smaller substances by ordinary chemical reactions.
Gregor Mendel observed that two plants with purple flowers could produce some offspring with white flowers and some offspring with purple flowers. Which of these choices did Mendel use to explain this result?
Answers
Answer:
Heterozygosity
Explanation:
The correct term that could explain the phenomenon is heterozygosity.
In heterozygous condition, a gene is made up of two different alleles in which one would be dominant and the other would be recessive.
In heterozygous purple plants in which the alternate color is white, the white color is not expressed because its allele is in a recessive state. If two heterozygous plants are mated, the recessive allele in each plant would combine into some of the offspring, resulting in the production of white color progeny in addition to the dominant purple color progeny.
Let us assume that the purple color allele is P and the white color is p.
Pp x Pp
PP Pp Pp pp
PP and Pp - purple color
pp - white color.
Answer:
dominant and recessive traits
Explanation:
List features shared by plants and charophytes that are not shared with most other eukaryotes
Answers
The features which are shared by plants and charophytes that are not shared with most other eukaryotes include:
ChloroplastCellulose structure.What is a Chlorophyll?This is referred to as a type of pigment which is green in color and is found and housed in the organelle known as chloroplast. It also traps the solar energy from the Sun which is required for photosynthetic activities and making of food by them.
Plants and charophytes have shared characteristics such as the presence of chlorophyll a and b and a cellulose structure which makes them rigid which makes them different from other eukaryotes.
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where did the crispr system first originate and what is its purpose in nature?
Answers
The CRISPR system was first originated in the bacteria, and it serves as a defense mechanism for them against viruses and other foreign genetic material.
The CRISPR system is a method of gene editing. It is a genetic engineering tool that can make precise modifications to DNA. It was first discovered in bacteria as a defense mechanism against viruses, but it has since been adapted for use in genetic engineering.
The CRISPR system is a natural defense mechanism of bacteria against viral infections. Bacteria are constantly exposed to viruses, which invade their cells and hijack their genetic machinery to reproduce. The CRISPR system acts as a kind of immune system for bacteria, allowing them to recognize and destroy invading viruses by cutting their DNA into pieces.The CRISPR system works by using a guide RNA to target specific sequences of DNA. The guide RNA is designed to match the sequence of the virus or other foreign genetic material, and once it finds its target, it signals the Cas9 enzyme to cut the DNA. This destroys the virus and prevents it from replicating.
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49. Seeds may be dispersed by which of the following methods?
a. gardeners planting gardens
b. through animal feces
c. on the shoes of people walking through fields
d. by transplanting small plants from one area to another
Answers
Is using fossil fuels in generating electricity better or using renewable energy? why?
Answers
Answer:
Explanation:
Using renewable energy will always be better than fossil fuels.
This is because fossil fuels need a very long time to renew themselves. And we will run out of them long before they can renew themselves. Besides this, there is a more concerning and very alarming issue with using fossil fuels instead of other energy sources. Global warming and environmental destruction is a very big problem for us in the 21st century. The air is more and more polluted. Temperatures are rising and oceans are rising with them. We will lose the ability to grow food and raise animals in the future if we continue like this.
what actions could we take to reduce the impact of humans on ocean ecosystems? group of answer choices create marine protected areas where harmful human activities such as fishing are banned by controlling and limiting the use of fertilizers and pesticides in agriculture by enforcing existing laws on fishing quotas and practices and establishing better international agreements reducing the amount of plastic used e.g. plastic bags and packaging all of the above!
Answers
Taking all of these actions together can help to reduce the impact of humans on ocean ecosystems and promote a more sustainable and healthy relationship between humans and the ocean.
Creating marine protected areas where harmful human activities such as fishing are banned can help to preserve and protect marine habitats and species, allowing them to thrive and recover from human impact.Controlling and limiting the use of fertilizers and pesticides in agriculture can help to reduce the amount of runoff and pollution that enters the ocean, which can lead to harmful algal blooms, dead zones, and other negative impacts on marine ecosystems.Enforcing existing laws on fishing quotas and practices, as well as establishing better international agreements, can help to ensure that fishing practices are sustainable and do not deplete fish populations or damage marine habitats.Reducing the amount of plastic used, such as plastic bags and packaging, can help to prevent plastic pollution in the ocean, which can harm marine life and ecosystems.What is an ecosystems?
An ecosystem is a community of living organisms (plants, animals, and microbes) interacting with each other and with their non-living (abiotic) environment (such as air, water, soil, and sunlight) in a particular area or region.
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Some people argue that
biochemical pathways are too complex to have evolved because
all intermediate steps in a given pathway must be present to
produce the final product. Critique this argument. How could
you use the diversity of metabolic pathways that produce the
same or similar products to support your case?
Answers
Answer:
all intermediate steps must be present
Explanation:
genetic evolution
The diversity of metabolic pathways changes the production of specific products with respect to the intermediate step present in the overall pathway.
What is a Metabolic pathway?A metabolic pathway may be characterized as a series of enzyme-catalyzed reactions that significantly direct the transformation of a substance into a final product.
It is true that biochemical pathways are too complex to have evolved because all intermediate steps in a given pathway must be present to produce the final product.
But apart from this, the diversity of metabolic pathways alters the synthesis of final products with respect to the intermediate steps that remarkably contribute to the overall reaction.
Therefore, the utilization of the diversity of metabolic pathways that produce the same or similar products directly depends on the intermediate steps.
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T/F the absence of chemical residues always rules out the possibility of arson
Answers
The statement ' the absence of chemical residues always rules out the possibility of arson' is false as chemical residues may contain arson.
While the presence of certain chemical residues, such as accelerants like gasoline or kerosene, can be a strong indicator of arson, their absence does not definitively rule out the possibility of arson.
Other factors, such as burn patterns, multiple points of origin, and eyewitness accounts, can also provide evidence of arson. Therefore, a thorough investigation involving multiple lines of evidence is necessary to determine the cause of a fire.
While the presence of chemical residues such as accelerants can provide strong evidence of arson, their absence does not necessarily rule it out.
There are several reasons why accelerants may not be found, including the use of a low-odor or slow-burning accelerant that does not leave behind significant residues, the complete combustion of the accelerant like arson during the fire, or the loss of the accelerant due to evaporation or soaking into porous materials before samples can be collected.
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How long does adaptation usually take? (Plant)
1.a decade
2.an hour
3.A few days
4.Centuries
Answers
Answer: The answer is (4), centuries
Explanation:
Plant adaptation is a long-term process that occurs over many generations. It is driven by natural selection, which is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce. Hence option D is correct.
The rate of plant adaptation can vary depending on the environment and the plant species. However, it is generally a slow process that takes many years or even centuries to complete.
For example, some plants have adapted to the cold temperatures of the Arctic over millions of years. These plants have developed thick, waxy leaves that help to insulate them from the cold, and they have also developed a slower metabolism that allows them to conserve energy.
Other plants, such as weeds, can adapt to new environments more quickly. This is because weeds are often generalists, meaning that they can survive in a wide range of conditions. They can also reproduce rapidly, which allows them to quickly spread to new areas.
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What is the main advantage of chronometric dating over relative dating?
A.
Chronometric dating is far more precise; it can pinpoint the exact year of a fossil.
B.
Chronometric dating causes less damage to fossils than relative dating.
C.
Chronometric dating requires no advance technology or expensive materials.
D.
Chronometric dating can compare the age of fossils found far from each other.
Answers
Answer:
A
Explanation:
Chronometric dating has revolutionized archaeology by allowing highly accurate dating of historic artifacts and materials with a range of scientific techniques.
Answer:
Chronometric dating has revolutionized archaeology by allowing highly accurate dating of historic artifacts and materials with a range of scientific techniques.
Explanation:
4. What is TRUE about the use of bones to solve crimes?
Children are best identified by
observing ribs and joints.
Adults are best identified using teeth and long bones.
When human bones are found, a crime definitely took place.
The long bones are measured in length and circumference.
Answers
The truth about the use of bones to solve crimes is that long bones are measured in length and circumference. That is option D.
What is a bone?A bone is defined as a rigid and hard structure which consists of compact tissues and makes up the musculoskeletal system of the body.
There are different types of bones which include the following:
Long bone: has a long, thin shape. Short bone: has a squat, cubed shape. Flat bone: has a flattened, broad surface. Irregular bone: has a shape that does not conform to the above three types.The long bones of human being can be measured in length and circumference which is an advantage against that of animals and can serve as solution in a crime scene.
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“Some viruses are programmed to reproduce by identifying bacteria, killing them, and assembling new viruses.viruses do not eat the bacteria and do not grow after they are made. Viruses are not alive. Explain two reasons why.”
Answers
1. Viruses cannot reproduce on their own: Unlike living organisms, viruses cannot reproduce on their own. They need to infect a host cell and hijack the host cell's machinery in order to replicate themselves. Once they have infected a host cell, they use the cell's energy and resources to create new copies of themselves. However, they do not have the ability to reproduce outside of a host cell.
2. Viruses do not have the ability to carry out metabolic processes: Living organisms carry out metabolic processes, such as respiration and digestion, in order to obtain energy and nutrients. Viruses do not have the ability to carry out these processes on their own. They rely entirely on the host cell to provide them with energy and nutrients. In fact, viruses do not even have the necessary machinery to carry out these processes. They lack the organelles, such as mitochondria, that are responsible for energy production in living cells.
Here is the table 1.1 explain the differences between the average numbers of mitochondria in the cells shown in table 1.1
Thankss
Answers
Answer:
which school are you from I may answer the questions
In the table, it is shown that the liver and the heart muscle cells contain the majority of the mitochondria, as they need more energy to carry out most of the vital reactions, and the sperm has less, while red blood cells have not a single.
What is the function of the mitochondria?The mitochondria are an organelle in which energy is produced, such as ATP, and most eukaryotic cells have this organelle, however, there are some exceptions, such as mature red blood cells, which do not have this organelle and produce energy through glycolysis and the pentose phosphate pathway. More mitochondria will be in those cells that work more.
Hence, in the table, it is shown that the liver and the heart muscle cells contain the majority of the mitochondria, as they need more energy to carry out most of the vital reactions, and the sperm has less, while red blood cells have not a single.
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in what two important ways is the pulmonary circulation different from the systemic circulation?
Answers
The pulmonary circulation and systemic circulation are two distinct circulatory systems within the body. The primary difference between the two is the function and destination of the blood they carry.
Firstly, the pulmonary circulation is responsible for the exchange of oxygen and carbon dioxide between the lungs and the blood, whereas the systemic circulation distributes oxygenated blood to the rest of the body.
Secondly, the pressure in the pulmonary circulation is lower than the pressure in the systemic circulation. This is because the pulmonary circulation only needs to pump blood to the lungs, whereas the systemic circulation pumps blood to the entire body, including the brain and other vital organs. This lower pressure in the pulmonary circulation allows for easier gas exchange in the lungs.
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The pulmonary circulation and systemic circulation are two distinct parts of the cardiovascular system. The pulmonary circulation is responsible for carrying deoxygenated blood from the heart to the lungs, where it is oxygenated and returned to the heart. The systemic circulation, on the other hand, is responsible for carrying oxygenated blood from the heart to the rest of the body.
There are two important ways in which the pulmonary circulation differs from the systemic circulation. Firstly, the pulmonary circulation involves a shorter distance for the blood to travel. This is because the lungs are located very close to the heart, and the blood only needs to travel a short distance to reach them. In contrast, the systemic circulation involves a much longer distance, as the blood must be pumped all the way to the extremities of the body.
Secondly, the pressure within the pulmonary circulation is much lower than that of the systemic circulation. This is because the pulmonary circulation only needs to move blood a short distance, and the lungs do not require the same amount of pressure as the rest of the body. In contrast, the systemic circulation requires much higher pressure to move blood to the extremities, which is why the left ventricle of the heart is much thicker and more muscular than the right ventricle. In summary, the two important ways in which the pulmonary circulation differs from the systemic circulation are the shorter distance for the blood to travel and the lower pressure within the system.
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Angiosperms are different from all other plants because only they have A. seeds B. vascular tissue C. flowers D. sexual reproduction the gametophyte is more obvious than the sporophyte.
Answers
Answer:
C is correct because angiosperms are the only organisms in the plant kingdom that create flowers.
Explanation:
A is incorrect because gymnosperms (conifers, cycads, ginkgo) also bear seeds.
B is incorrect because the majority of extant plants are vascular plants.
D is incorrect because the gametophyte in angiosperms is significantly reduced in size compared to that of gymnosperms.
how to control diarrhoea
Answers
Answer:
Diarrhea should go away in a few days without treatment. until you feel better, rest, drink enough fluids, and watch what you eat.
the most common mineral group contains___ minerals 3.1.3
Answers
Answer: silicate minerals
Explanation: I am truly sorry if i didn't understand or got it wrong ty
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PLEASEEE HELP!!! Can someone please help me with this question
Answers
Answer:
The answer is
Explanation:
The particle is a virus because it has genetic information and can infect humans.
Hope this helps....
Have a nice day!!!!
Answer:
A
Explanation:
What is the name for the process of using light energy to convert carbon dioxide and water to glucose and oxygen?
Answers
Answer:
Option D. Photosynthesis
Explanation:
Photosynthesis is the process of using light energy to convert carbon dioxide and water to glucose and oxygen. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
What goes first with organ ,epithelial tissue ,epithelial cell and organ system
Answers
Epithelial tissue lines the organs of the body, including the lungs, heart, and stomach.
Is epithelium an organ system?Epithelium, endothelium, and mesothelium are three types of epithelial cell sheets that line your internal organs, and body space and form the outer layer of your skin. Epithelium generally lines alleyways that are open to the external environment, such as your respiratory area and digestive system.
Glandular epithelial tissue is also established as part of the glands, including hormone-manufacture organs like the liver, pancreas, and spleen. Epithelial tissues are widespread all around the body. They form the covering of all body surfaces.
So we can conclude that Simple epithelial tissues are normally classified by the shape of their cells.
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the organ that makes estrogen and progesterone is the __________.
Answers
The organ that makes estrogen and progesterone is the ovaries.
The ovary is a female reproductive system organ that produces an egg. When this is discharged, it goes down the fallopian tube into the uterus and may be fertilised by a sperm. Each side of the body has an ovary (from Latin ovarium, 'egg, nut').
The ovaries also produce hormones that influence the menstrual cycle and fertility. The ovary goes through various phases, beginning in the perinatal period and ending with menopause. Because of the many hormones that it secretes, it is also an endocrine gland.
The ovaries are referred to as the female gonads. Each ovary is pale in colour and is positioned beside the uterine lateral wall in a location known as the ovarian fossa. The ovarian fossa is the area in front of the ureter and the internal iliac artery that is limited by the external iliac artery. This section is approximately 4 cm x 3 cm x 2 cm in size.
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What is true about low-level radioactive waste?
Select all that apply.
Most states have a low-level radioactive waste disposal site.
Low-level radioactive materials may be incinerated before disposal so they take up less space.
Supplies used in nuclear medicine are considered low-level waste.
Materials that have not been contaminated by radioactive materials are still considered low-level waste if they have been exposed to neutron radiation.
Answers
Answer:
Materials that have not been contaminated by radioactive materials are still considered low-level waste if they have been exposed to neutron radiation.
Scavengers living in the coral reef scavengers living in the coral reef clean up algae and decayed matter. Thus, correct answer is B.
What are the ways to control starfish populations?The Harlequin shrimp is a native of salt water marine environment. It is found near the coral reefs in the Pacific and Indian Oceans. It drives nutrition by eating starfish. They are very skilled in obtaining the starfish as a prey. They firstly eat the tube feet and soft tissues and then the central disk is feeded upon.
They are also called Hymenocera picta scientifically and are majorly habitats to the coral of the Pacific and the Indian oceans. They belong to the phylum Arthropoda and are invertebrates.
They are two inches in length and specifically eats starfishes. Their feeding mechanism enables the population of the starfish to be balanced as starfishes are the primary food source for them.
Therefore, Scavengers living in the coral reef scavengers living in the coral reef clean up algae and decayed matter. Thus, correct answer is B.
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Explain how mitosis can contribute to the maintenance and complexity of life on Earth?
Answers
Answer:
The process of mitosis generates new cells that are genetically identical to each other. Mitosis helps organisms grow in size and repair damaged tissue. Some species of algae are capable of growing very quickly.
Explanation:
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