Can we call human evolution as adaptive radiation

View Schools What Is a Radiation Oncology Technician? A radiation oncology technician -- more commonly called a radiation therapist -- is a healthcare professional who specializes in using radiation technology to treat cancer patients. Based on the orders of oncologists and dosimetrists, radiation therapists use linear accelerators to administer radiation therapy to patients. Prior to the procedure, they discuss the treatment strategy with patients and address any questions or concerns they might have. During the procedure itself, they are responsible for positioning the patient, following safety protocols to prevent overexposure, ensuring that the machine is functioning properly and monitoring the patient's reaction. They must also keep careful records of the treatment for review by the physician. The table below gives an overview of what you might want to know about becoming a radiation oncology technician. Degree Required Associate's or bachelor's degree Education Field of Study Radiation therapy, radiography/radiological imaging Key Skills Using radiation-based equipment to diagnose and treat cancer Licensure Required Licensure and certification may be required, varies by state Job Growth (2020-2030) 9%* Average Salary (2020) $94,300* Source: *U.S. Bureau of Labor Statistics What Are the Duties of a Radiation Oncology Technician? Radiation therapy, also called radiotherapy and irradiation, is used to destroy cancer cells and is administered as a treatment in more than ...

1. Average oncologist income is up. According to the latest Medscape Physician Compensation report, average oncologist incomes increased by 2% in 2021, from an average of $403,000 in 2020 to $411,000 in 2021. Consistently high salaries may be one reason most oncologists feel “fairly compensated.” Two out of three surveyed oncologists told Medscape they believe they’re fairly compensated. Even though oncologists are not the highest paid physicians (that honor goes to plastic surgeons), cancer doctors rank near the top of the list of physicians who feel fairly compensated. 4. Paperwork takes up a significant amount of oncologists' time. Oncologists aren’t necessarily getting paid to do what they love most, caring for patients. The Medscape report showed that cancer physicians spent 15.8 hours a week on administrative tasks and paperwork. This burden takes time away from patient care, which reduces income. Also, when it comes to who spends the most time on administrative tasks, oncologists are inline with physicians overall, who average 15.5 hours per week. 5. Oncologist salary varies according to geographic location. Oncologists in the South and Midwest earn more, on average, than oncologists who work on the East coast, despite the inflated cost of the living and presence of prestigious cancer centers in the major metropolitan areas in New York City, Boston, and Baltimore. According to Physicians Thrive, the difference in salary is a question of Was this helpful?

One of these paths of macroevolution is called divergent evolution. In divergent evolution, a single species interbreeds, either through natural means or artificially chosen traits and selective breeding, and then that species begins to branch off and become a different species. Over time as the two new different species continues to evolve, they become less and less similar. In other words, they have diverged. Divergent evolution is a type of macroevolution that creates more diversity in species in the biosphere. Catalysts Sometimes, divergent evolution occurs through chance happenings over time. Other cases of divergent evolution become necessary for survival in a changing environment. Some circumstances that can drive divergent evolution include natural disasters like volcanoes, weather phenomena, the spread of disease, or an overall climate change in an area in which the species lives. These changes make it necessary for the species to adapt and change in order to survive. Natural selection will "select" the trait that is more beneficial for the species' survival. Adaptive Radiation The term adaptive radiation is also sometimes used interchangeably with divergent evolution. However, most science textbooks agree that adaptive radiation is focused more on the microevolution of a rapidly reproducing population. Adaptive radiation may lead to divergent evolution over time as the new species become less similar, or diverge, in different directions on the tree of life. While...

Speciation and Adaptive radiation: • The fast evolution of various species from a common parent species is referred to as adaptive radiation. • Speciation occurs as a result of adaptive radiation. • When a group of individuals within a species gets departed from the rest of the species and the development of its own distinct features takes place, this is known as speciation. • It is the process of creating a new microbe, plant, or animal species.

Question Updated on: 13/06/2023 When electromagnetic radiaiton of wavelength 300 n m falls on the surface of sodium electrons are emitted with a kinetic enegry of 1.68 × 10 5 J m o l −. What is the minimum enegry needed to remove an electorn from sodium? Strategy: The minimum enegry required to remove an electron from target metal is called work function W 0 of the metal. It can be calculated from Eq., provided we know the energy of the incident photon and kinetic enegry of a single photoelectorn. Step 1 : Calculating the enegry ( E ) of incident photon: E = h v = h c λ = ( 6.6 × 10 − 34 J s ) ( 3.0 × 10 8 m s − 1 ) ( 300 × 10 − 9 m ) = 6.6 × 10 − 19 J Step 2 : Calculating the kinetic enegry of a single photoelecton: K E = ( 1.68 × 10 5 J m o l − 1 ) 6.022 × 10 23 e m o l − 1 0.279 × 10 18 J e − 1 = 2.79 × 10 − 19 J e − 1 Step 3 : Calculating the minimun energy needed to remove an electorn: h v = h v 0 + k E ∴ h v 0 = h v − k E = ( 6.6 × 10 19 J ) − ( 2.79 × 10 − 19 J ) = 3.81 × 10 − 19 J When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with kinetic energy of 1.68 xx 10^(5) J "ml"^(-1) . What is the minimum energy needed to remove an electron from sodium ? What is the maximum wavelength that will cause a photoelectron to be emitted. When electromagnetic radiations of wave length 300nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68xx10^(5) J "mol"^(-1) . What is the minimum energy ...

Resident Salaries by Post-Graduate Year (Effective 7/1/2023) POSITION ANNUAL SALARY PGY 1 $69,869 PGY 2 $72,536 PGY 3 $76,062 PGY 4 $80,311 PGY 5 $83,041 PGY 6 $86,534 PGY 7 $88,923 PGY 8 $90,907 PGY 9 $94,405 Benefits • Medical Plan • Prescription Drug Plan • Dental Plan • Vision Plan • Employee Life Insurance • Tax-Deferred Retirement Plan with health system direct contributions and matching

[ "article:topic", "authorname:openstax", "absorber", "blackbody", "blackbody radiation", "emitter", "Planck\u2019s hypothesis of energy quanta", "power intensity", "quantized energies", "quantum state of a Planck\u2019s oscillator", "Stefan\u2013Boltzmann constant", "license:ccby", "showtoc:no", "program:openstax", "licenseversion:40", "source@https://openstax.org/details/books/university-physics-volume-3" ] \( \newcommand\) • • • • • • • • • • • • • • • Learning Objectives By the end of this section you will be able to: • Apply Wien’s and Stefan’s laws to analyze radiation emitted by a blackbody • Explain Planck’s hypothesis of energy quanta All bodies emit electromagnetic radiation over a range of wavelengths. In an earlier chapter, we learned that a cooler body radiates less energy than a warmer body. We also know by observation that when a body is heated and its temperature rises, the perceived wavelength of its emitted radiation changes from infrared to red, and then from red to orange, and so forth. As its temperature rises, the body glows with the colors corresponding to ever-smaller wavelengths of the electromagnetic spectrum. This is the underlying principle of the incandescent light bulb: A hot metal filament glows red, and when heating continues, its glow eventually covers the entire visible portion of the electromagnetic spectrum. The temperature ( T) of the object that emits radiation, or the emitter, determines the wavelength at which the radiated energy is ...

Discussion introduction A good, general sequence to remember is radio waves, microwaves, infrared, light, ultraviolet, x-rays, gamma rays micropulsations • small, almost sinusoidal fluctuations of the geomagnetic field, usually with durations of seconds to minutes radio waves • oscillating, electric circuits • discovered in 1888 • micropulsations, electric power transmission, analog audio signals, radio transmission, microwaves • ELF, SLF, ULF, VLF, LF, MF, HF, VHF, UHF, SHF, EHF Radio Frequency Bands 1 *The ITU actually assigns the designation ELF to everything below VLF. Thus ELF on the table above is ELF1, SLF is ELF2, and ULF is ELF3. †The middle bands are sometimes identified by their relative wavelengths. Thus low frequency (LF) is also called long wave (LW), medium frequency (MF) is also called medium wave (MW), and high frequency (HF) is also called short wave (SW). ‡This designation is not official, but I like it. The "t" in tremendous matches the "t" in terahertz (the geometric mean of the band), matches the "t" in twelve (1THz=10 12Hz), matches the "t" in trillion (10 12 is also known as a trillion). name ITU 1 number frequency wavelength extremelylowfrequency (ELF)* 1 (~10 01Hz) 3 - 30Hz 100,000 - 10,000km superlowfrequency (SLF)* 2 (~10 02Hz) 30 - 300Hz 10,000 - 1,000km ultralowfrequency (ULF)* 3 (~10 03Hz) 300 - 3000Hz 1000 - 100km verylowfrequency (VLF) 4 (~10 04Hz) 3 - 30kHz 100 - 10km lowfrequency (LF) † 5 (~10 05Hz) 30 - 300kHz 10 - 1km mediumfrequency (M...

\( \newcommand\) • • • What is next for life on Earth? Life is dynamic! Species begin, populations grow, species die out, new species are born. Extinction is an important part of this. If organisms never went extinct, there wouldn't be any habitats available for new ones to arise. What could be next? Extinction Most of the species that have lived have also gone extinct. There are two ways to go extinct. The most obvious way is to die out completely. The other way a species goes extinct is if it evolves into a different species. Extinction is a normal part of Earth's history. Most of the organisms that have lived have gone extinct. Sometimes large numbers of species go extinct in a short amount of time. This is a mass extinction. The causes of different mass extinctions are different: collisions with comets or asteroids, massive volcanic eruptions, or rapidly changing climate are all possible causes of some of these disasters ( Figure below). An extinct Tyrannosaurus rex. This fossil resembles a living organism. Adaptive Radiation After a mass extinction, many habitats are no longer inhabited by organisms because they have gone extinct. With new habitats available, some species will adapt to the new environments. Evolutionary processes act rapidly during these times. Many new species evolve to fill those available habitats. The process in which many new species evolve in a short period of time to fill available niches is called adaptive radiation. At the end of this period ...

We have to find h ν o ​ h ν o ​ = h ν − K E = λ h . C ​ − 6 . 0 2 3 × 1 0 2 3 1 . 6 8 × 1 0 5 5 / m o l ​ h ν o ​ = 3 0 0 × 1 0 − 9 m 6 . 6 2 6 × 1 0 − 3 4 × 3 × 1 0 8 ​ − 6 . 0 2 3 × 1 0 2 3 1 . 6 8 × 1 0 5 ​ = 0 . 0 6 6 2 6 × 1 0 − 1 7 − 0 . 2 7 8 9 × 1 0 − 1 8 = 0 . 0 6 6 2 6 × 1 0 − 1 7 − 0 . 0 2 7 8 9 × 1 0 − 1 7 h ν o ​ = 0 . 0 3 8 3 7 × 1 0 − 1 7 J The minimum energy necessary to overcome the attractive force between the electron and the surface of the silver metal is 7 . 5 2 × 1 0 − 1 9 J. What will be the maximum kinetic energy of the electrons ejected from silver which is being irradiated with ultraviolet light having a wavelength 3 6 0 A ˚?