A bird just sitting on a wire doesn't touch the ground, or anything in contact with the ground, so electricity stays in the power line. However, if a bird were to touch a power line as well as equipment or other metal that is grounded, it could potentially give electricity a path to the ground and the bird could be shocked.
When a bird is perched on a single wire, its two feet are at the same electrical potential, so the electrons in the wires have no motivation to travel through the bird’s body. No moving electrons means no electric current. The bird is safe, however if that bird stretches out a wing or a leg and touches a second wire, especially one with a different electrical potential, it will open a path for the electrons — right through the bird’s body.
Power lines carry alternating currents or AC where the electric current regularly changes direction. Over time the voltage alternates between positive and negative indicating the direction of voltage flow. Voltage is the difference in charge between two points, whilst current, measured in amperes, or amps, is the rate at which the charge is flowing. The number of cycles per second is measured in Hertz (Hz) and average power lines have a frequency of 50 Hz. Because the voltage in the wire is constantly changing, the voltage of a bird sitting on a wire is also changing. In other words, the bird is constantly being charged and discharged through its feet.
The other thing we need to think about is the capacitance of the bird. This is the ability of the bird to collect and store electric charge. Because birds are very small and shaped a bit like spheres, they can’t store much electric charge. In fact, when a bird sits on a 50 Hz power line it can only carry a current in the order of microamps (μA), or 0.00000001 amps.
So although the bird does have a current running through its body, it is too small to electrocute it or even give it an electric shock. For comparison, a current of about 10 milliamps (0.01 amp) is enough to produce a painful shock in humans, and electrocution is possible from about 50 milliamps. We don’t know whether birds perched on power lines can feel the current going through their bodies. Perhaps they enjoy the buzzing sensation that they may be feeling and perhaps this explains why you don’t often see big birds, with a larger capacity, sitting on power lines.
A bird is also made of cells and tissues. These cells and tissues do not provide the electricity in the wire with an easier route to travel than the one it is already on. Because a bird's body is not a good conductor of electricity, the electricity essentially ignores the bird on the wire and continues to travel along the copper wiring to its destination. In fact, humans would also be able to not be shocked by a power line if we hung suspended from the power line with both of our hands on the line and no other grounding objects around us.
Answer:
bird's don't get electrocuted when they land on electric wire because their legs don't have blood
darwin was well aware of what effect his theory of evolution would have on the public and on the church of england.
Darwin was well aware of what effect his theory of evolution would have on the public and on the church of England.
The statement is true.
Darwin's groundbreaking theory was that new species do not originate from God's eternally unchangeable creation but rather develop organically via a process of evolution.
Darwin held off on releasing his findings for several decades while he gathered more evidence because he was fully aware of the effect his theory of evolution would have on the general public and the Church of England. He suggested that natural populations can also change after citing selective breeding of tamed animals as proof that groupings of creatures can undergo change.
The public and religious establishment in Britain was astonished when Darwin's work was first made public in 1859.
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Antibodies that help defend the body against harmful substances are which
type of biomolecule?
B. Carbohydrates
A. Nucleic acids
C. Proteins
D. Lipids
Do cells use carbohydrates as a source of amnio acids
Answer:
Yes sssdddddsdsssss
Explanation:
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The examination of physical evidence by a forensic scientist is usually undertaken for.
The examination of physical evidence by a forensic scientist is usually undertaken for identification or comparison purposes.
A forensic scientist is a kind of scientist that has a keen observation so that he can analyze a crime scene and carry out investigations.
Physical evidence can be described as any clue, such as an object, an impression, marks, etc that are present at the crime scene.
Based on the physical evidence, the forensic scientist can carry out an investigation. The physical evidence acts as a solid clue in crime investigations. A forensic scientist can identify the clue or compare it with a suspect in order to catch a culprit.
Physical, as well as chemical examination of the physical evidence, is done so that authentic results can be deduced from it.
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which term best describes the organization of the nervous system? please choose the correct answer from the following choices, and then select the submit answer button. answer choices hierarchical random linear disconnected
Hierarchical is the word that best explains how the nervous system is organized.
What exactly is a nervous system?The control center of your body is your neurological system. It is controlled by your brain and governs your actions, thoughts, and automatic reactions to your environment. Additionally, it regulates other bodily functions and systems, including digestion, breathing, and sexual development (puberty).Why is the nervous system so crucial?The nervous system facilitates communication between all body parts. In addition, it responds to alterations both inside and outside the body. The nervous system transmits and receives information using both chemical and electrical methods.There are two primary sections of the nervous system: The brain and spinal cord make up the central nervous system.learn more about nervous system here
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How can you justify that Golgi exhibits the phenomenon of membrane flow?
67. huang hh, liang y. integrating molecular interactions and gene expression to identify biomarkers and network modules of chronic obstructive pulmonary disease. technol health care 2022; 30: 135-142.
Chronic obstructive pulmonary disease (COPD) is the world's top cause of death for the greatest number of individuals, known for its chronic obstructive diseases, chronic bronchitis, and emphysema.
How genes impact on COPD?The precise causal process of COPD is still unknown, despite several attempts to discover biomarkers and pathways. In order to better understand the biological mechanism and network module underlying COPD, this study integrates information on biological interactions with information on gene expression. 49 genes were chosen using a sparse network-based technique from the peripheral blood mononuclear cell expression data of 136 participants, comprising 42 ex-smokers and 94 COPD patients. The findings indicate that these 49 genes may have an impact on COPD-related biological functions and molecular processes.Learn more about the COPD with the help of the given link:
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answers
1. Top Predator
2. Carnivore
3. Herbivores
4. Producers
Answer:
found at the producers 4.
The main purpose of a forester is to identify land for timber harvesting.
Under a microscope you view a cell with an extensive smooth endoplasmic reticulum present. What could this indicate?.
The cell has a high energy demand.The clean endoplasmic reticulum capabilities in lots of metabolic processes. It synthesizes lipids, phospholipids as in plasma membranes, and steroids. Cells that secrete those merchandise, which includes cells of the testes, ovaries, and pores and skin oil glands, have an extra of clean endoplasmic reticulum.
Large quantities of clean ER are located in liver cells in which one in every of its important capabilities is to detoxify merchandise of herbal metabolism and to endeavour to detoxify overloads of ethanol derived from extra alcoholic ingesting and additionally barbiturates from drug overdose.
Smooth ER includes an extended community of a folded, tube-like structure. You can think about it like a pipeline with a variety of twists and turns. The indoors of the clean ER is known as the lumen, that is enclosed via way of means of a phospholipid membrane, much like the membrane that encloses the complete cell.
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How are iconic and covalent bonds alike? How are they different?
Does the formation of sperm is more in low temperature???
Answer:
Sperm production is a process that's sensitive to heat. Ideally, sperm production occurs around 93.2ºF, which is about 5ºF below normal body temperature. This is why the testes hang below the body to keep the temperature a bit lower.
Explanation:
Which of the following is not one of the eight characteristics of life?
A) Homeostasis
B) Growth
C) Movement
D) using energy and resources
Answer:
Suppose D since even non living things could use energy
double histidine based epr measurements at physiological temperatures permit site-specific elucidation of hidden dynamics in enzymes
Double Histidine Based EPR Measurements at Physiological Temperatures Permit Site‐Specific Elucidation of Hidden Dynamics in Enzymes is a research paper written by Kevin Singewald and Xiaowei Bogetti.
What is the abstract?All biological activities revolve around protein dynamics. In this study, we use the dHis-Cu(II)NTA motif to gather site-specific data on dynamics for both a ß-sheet and a -helix site of GB1, the protein G immunoglobulin binding domain. Our CW-EPR measurements revealed spectral characteristics that agreed with both the general rigidity of GB1 and the expectations made by molecular dynamics simulations. With the use of this knowledge, we demonstrate how this method may be used to clarify the role of dynamics in substrate binding of a functionally essential -helix in human glutathione transferase A1-1 (hGSTA1-1). We find that the helix has two dynamical modes. The inclusion of the inhibitors GS-Met and GS-Hex caused the structure of hGSTA1-1 to favor the more rigid active state, but the faster mode may help with the search.
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Homo _____ is the only surviving species of the genus Homo (choose your answer… sapiens, erectus or habilis). The first modern human trait to evolve was ______ (choose your answer… bipedalism, symbolic language or a massive skull), which allowed early humans to walk upright and use ______ (choose your answer… tools, fire or language).
Answer: Homo Sapiens is the only surviving species of the genus Homo (choose your answer… sapiens, erectus or habilis). The first modern human trait to evolve was bipedalism (choose your answer… bipedalism, symbolic language or a massive skull), which allowed early humans to walk upright and use tools (choose your answer… tools, fire or language).
Explanation:
When are hypothesis supported in science?
(Environmental science)
Answer:
it has to be an idea that can be supported through carefully crafted experimentation or observation.
What is the typical magnification of an ocular lens? What other magnifications are possible?
(Subject science)
Answer:
An ocular lens consists of one to three lenses and is also provided with a mechanism, called a field stop, that removes unnecessary reflected light and aberration. Different types are available according to the magnification they provide, such as 7x and 15x.
Our body needs Oxygen and Glucose to ensure which process can take place in our
body?
A. Homeostasis
B. Photosynthesis
C. Thermoregulation
D. Cellular Respiration
Answer: Number D
Explanation: During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts.
Answer:
The answer will be
D). Cellular Respiration
Which of the following are examples of processes in your body that we must keep balanced?
A. Blood sugar levels, heart rate, wrinkles on our skin, and brushing our teeth
B. Body temperature, finger nail growth and food intake
C. Body temperature, blood sugar levels, and blood pressure
D. None of the above
Answer:
option = c the process in body that w must keep balanced are body temperature, blood sugar levels and blood pressureBody temperature, blood sugar levels, and blood pressure are examples of processes in your body that we must keep balanced. Therefore, option (C) is correct.
Body temperature, blood sugar, and blood pressure must be adjusted for health. Homeostatic mechanisms control these physiological processes to preserve internal stability and optimise cellular and organ function.
To facilitate metabolism and enzyme activity, body temperature is tightly controlled. To keep cells energised and avoid consequences from excessive or low blood sugar, glucose levels must be managed. Controlling blood pressure ensures adequate blood circulation and protects blood vessels and organs.
Option A includes wrinkling and tooth brushing. Option B contains unregulated processes like fingernail growth and food intake. Option D claims that none of the following are balanced processes, yet option C lists balanced bodily processes.
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How to cure ringworm?
What component of plant cells does the tobacco mosaic virus infect?
natural selection is a fundamental mechanism driving the evolution of species. to research this conclusion, a group of scientists wants to test the effects of increased ocean acidity on a population of coral. what result from this experiment would confirm that natural selection is a process that can drive evolution? (3 points)
Many soil-dwelling bacteria produce molecules that can be naturally synthesized and kill other species of bacteria. What are these bacteria-killing molecules called?.
These molecules that kill bacteria are known as anti-biotics.
Antibiotic literally translates to "against bacteria". It is a specific class of antimicrobial agent that works to kill bacteria. The use of antibiotic drugs is common in the treatment and prevention of bacterial infections since they are the most effective type of antibacterial agent. Bacterial growth may be prevented or killed by them.They either destroy the germs or make it difficult for them to proliferate and flourish.There are several ways to take antibiotics:Orally (by mouth): These could be tablets, capsules, or liquids.Topically: You might apply this to your skin as a cream, spray, or ointment. Additionally, it can be ear drops, eye drops, or eye ointment. Intravenously: an injection.So, the answer is antibiotics.
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charlotte looks at a plant through a microscope and notices that the plant cells are packed with green chlorophyll. there is also a thin waxy layer at the top of the segment. what part of the plant is she most likely viewing?
The part of the plant where cells are packed with green chlorophyll and there is also a thin waxy layer at the top of the segment can be the leaves.
Chlorophyll is the green colored pigment found in the plants. It is present inside the chlorophyll and is involved in the process of photosynthesis. The function of the chlorophyll is absorb the energy from the sunlight, which participates in the light reaction.
Leaves are the thin flattened structures of the plant that arise from the stems. They are mostly green in color and whole cells are rich in chlorophyll. The function of the leaves if to make food for the entire plant by photosynthesis.
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novel cell types and developmental lineages revealed by single-cell rna-seq analysis of the mouse crista ampullaris
On ampullae microdissected from E16, E18, P3, and P7 mice, single-cell RNA-seq was carried out.
Briefing:The crista's hair cells, support cells, and glia were discovered by cluster analysis, along with the ampulla's dark cells and other nonsensory epithelial cells, mesenchymal cells, vascular cells, macrophages, and melanocytes.
The new cell types identified by single-cell RNA-seq may be crucial for comprehending crista function, and the markers found in this study may make it possible to examine how these cells change during development and disease.
Where are the vascular in the body?The network of blood vessels known as the vasculature connects the heart to all other organs and body tissues. Organs and tissues receive oxygen-rich blood and nutrients from the heart through arteries and arterioles, while deoxygenated blood is returned to the heart by veins and venules.
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what term describes the measure of how quickly a carbohydrate will raise an individual’s glucose levels when consumed on its own, irrespective of the amount eaten?
Glycaemic index is used to measure the amount of carbohydrates that will raise an individual’s glucose levels.
Glucose is a sweet sugar and belongs to the class of carbohydrates.
It is obtained from food that we consume and in response our body utilizes it for energy purposes.
Glycaemic index of food refers to the time period during which carbohydrates are disintegrated and absorbed in the blood.
If GI is higher then it will enter the blood more quickly as compared to lower GI levels.
Higher GI levels means higher glucose levels in the blood and vice versa.
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macrophage are immune system cells that patrol the blood and body tissues. when a macrophage finds a foreign invader, the macrophage ingests (takes in) the foreign invader and then chemically digests (breaks down) that foreign invader. to perform this frequent chemical digestion, macrophage have more than the average body cell.
macrophage are immune system cells that patrol the blood and body tissues. when a macrophage finds a foreign invader, the macrophage ingests (takes in) the foreign invader and then chemically digests (breaks down) that foreign invader. to perform this frequent chemical digestion, macrophage have more than the average body cell is
Macrophages are immune system cells that are vital to the development of non-specific defense mechanisms that provide the first line of defense against pathogens. These large immune cells are present in nearly all tissues and actively remove dead and damaged cells, bacteria, cancerous cells, and cellular debris from the body.
What is Macrophages?
Macrophages are specialized cells that hunt for, engulf, and kill bacteria and other dangerous organisms. They can also activate other cells by releasing substances known as cytokines, which present antigens to T cells and start an inflammatory response.
Blood monocytes that leave the bloodstream to differentiate in various organs give rise to macrophages. Each macrophage population exhibits significant variety, which most likely reflects the level of specialization necessary for each tissue's environment.
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what field of work has been most impacted as dna technology has improved? banking forensic analysis international trade electronics manufacturing
Forensic Analysis has been most impacted as DNA technology has improved. For Example, DNA Fingerprinting.
Forensic Analysis- The term "forensic analysis" refers to a comprehensive process for determining, examining, and documenting the origin, development, and consequences of a security incident or a breach of municipal, state, and organizational legislation.
DNA Fingerprinting- The nucleotide sequences of specific human DNA regions that are distinctive to each individual are used in the laboratory procedure known as DNA fingerprinting to ascertain a person's likely identification.
Nucleotide Sequence- The most fundamental understanding of a gene or genome is its nucleotide sequence. No comprehension of genetic function or evolution could be complete without learning about this blueprint, which includes the instructions for developing an organism.
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ringworm is caused by: group of answer choices worms infected with fungi invading the skin. dermatophytes that have invaded deep into the living tissue. a hypersensitivity caused by superficial contact with dermatophytes. toxins produced by dermatophytes. dermatophytes growing in the outer dead tissue layers of the skin (epidermis).
Ringworm is caused by C) dermatophytes growing in the outer dead tissue layers of the skin epidermis.
Ringworm is spread through pores and skin-to-pores and skin touch or via touching an infected animal or object. Ringworm is usually scaly and can be crimson and itchy. Ringworm of the scalp is common in children, where they could purpose bald patches.
Ringworm is a common fungal pore and skin infection otherwise called tinea. Ringworm maximum normally affects the skin on the frame tinea corporis, the scalp tinea capitis, the feet tinea pedis, athlete's foot, or the groin.
Ringworm after touching an animal that has ringworm. Many special sorts of animals can unfold ringworm to people, which include puppies and cats, especially kittens and puppies.
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Disclaimer:- your question is incomplete, please see below for the complete question.
A) worms infected with fungi invading the skin.
B) dermatophytes that have invaded deep into the living tissue.
C) dermatophytes growing in the outer dead tissue layers of the skin (epidermis).
D) a hypersensitivity caused by superficial contact with dermatophytes.
E) toxins produced by dermatophytes.
What structural property of dna gave watson and crick the idea that dna replication was likely to proceed via a semiconservative mechanism?.
The complementary nature of base pairing between the two strands of DNA is the structural property of DNA that gave Watson and Crick the idea that DNA replication was likely to proceed via a semiconservative mechanism.
Watson and Crick are the two scientists known for coming up with the model of DNA, the hereditary molecule. DNA is a double helix structure made up of two strands. These strands are held together by the complementary pairing of the 4 nucleotide bases.
In the DNA, adenine from one strand pairs with thymine from the other strand. Guanine from one strand pairs with cytosine. This complementary pairing is the reason that Watson and Crick proposed the semi-conservative model for DNA replication.
In the semi-conservative model, each strand of DNA acts as a template strand from which a new strand is made.
Although a part of your question is missing, you might be referring to this question:
What structural property of DNA gave Watson and Crick the idea that DNA replication was likely to proceed via a semiconservative mechanism?
A) The nitrogen content in the bases
B) The complementary nature of base pairing between the two strands
C) The repeating nature of the sugar-phosphate backbone
D) The helical shape of the double strand
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the transcription factor zeb2 regulates development of conventional and plasmacytoid dcs by repressing id2.
Answer: Zeb2 controls commitment to both the cDC2 and pDC lineages by inhibiting Id2.
Explanation: Pre-pDCs give rise to plasmacytoid dendritic cells, whereas pre-cDCs, which are lineage-committed, give rise to the two lineages of conventional dendritic cells (cDC1 and cDC2). The formation of pDCs and cDC1s has been linked to a number of transcription factors , but it is uncertain whether TFs are necessary for pre-cDCs to commit to the cDC2 lineage at an early stage. From the pre-pDC and pre-cDC stage on, Zeb2 was expressed, and it was significantly expressed in mature pDCs and cDC2s. Id2 was discovered to be a specific target of Zeb2 by chromatin immunoprecipitation research. We thus deduce that Zeb2 controls commitment to both the cDC2 and pDC lineages by inhibiting Id2.
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